中国物理学会高能物理分会第十二届全国会员代表大会暨学术年会

13 Jul 2026, 08:00 → 19 Jul 2026, 19:00 Asia/Shanghai

中国物理学会高能物理分会第十二届全国会员代表大会暨学术年会定于2026年7月13日至19日在广州召开。会议由中国物理学会高能物理分会主办、华南师范大学承办。会议期间将同期举办第十四届“晨光杯”优秀论文评选活动，高能物理战略研讨会也将在大会召开之前于2026年7月14日召开。

现将相关事宜通知如下。

一、会议主要内容：

（一）交流国内外高能物理和粒子物理领域最新研究成果和进展。

        本次大会将按照以下五个研究领域来组织报告，并在每个领域中包含实验和理论研究进展：

1. TeV物理和超出标准模型新物理

2. 强子物理与味物理

3. 高能重离子物理

4. 中微子物理、粒子天体物理与宇宙学

5. 粒子物理实验技术

       大会组委会诚挚邀请各位同仁参加本届会议，并积极提交学术报告摘要。报告安排及日程将在后续通知和会议网站中发布。本次会议也安排海报展示，海报尺寸:90厘米*120厘米。

        

（二）第十四届“晨光杯”青年优秀论文评选。

        高能物理分会每两年举办一次青年优秀论文评选。第十四届“晨光杯”青年优秀论文评选与第十五届全国粒子物理学术会议同期举办，欢迎青年科技人员积极参加评选活动，并邀请各位高能物理分会的常委和委员积极组织、推荐优秀论文参选。

参加评选活动的条件：

1. 申请人是从事高能物理（包括粒子物理理论和实验、中高能核物理、宇宙线和高能天体物理等）科研工作的35岁以下尚未获得高级科教职称的青年科研人员（即不接受已经获得教授、副教授以及同等职称的研究人员参评）。

2. 参评论文必须是申请截止日期以前，已正式发表的论文或已接受发表的论文。

3. 申请人应为参评论文的主要贡献者，且申请人及申报论文的第一单位为国内单位。

4. 参评论文正式发表时间为上届“晨光杯”评选活动截止（2024年4月30日）后正式发表的论文。

        申请于2026年4月30日截止（以电子邮件接收时间为准）。符合条件的申请人将申报论文、《申请—推荐表》及所需之两位《专家评阅意见表》（已正式发表的论文不必填写此表）的电子版文件(表格下载地址: https://indico.ihep.ac.cn/event/28557/)，在截止日期前发送至学会秘书处（邱雯：qiuw@ihep.ac.cn）。学会秘书处将对申请人和所申报的论文进行资格审查，并根据申报论文的专业内容，组织专家初评。进入终评论文的作者将在本届全国高能物理大会上报告论文成果，经终评委员会评委无记名投票遴选出“晨光杯”青年优秀论文。

        “晨光杯”将设一等优秀论文1-3篇，二等优秀论文3-6篇。高能物理分会将对优秀论文作者颁发入选证书和物质鼓励。

        诚挚邀请各位老师同仁在征集范围内积极组织、推荐论文参加。

二、会议有关事项：

1．会议时间：2026年7月15日－7月19日，7月14日报到，7月19日离会。

        高能物理战略研讨会将于2026年7月14日召开，拟参加战略研讨会的老师敬请7月13日报到。

2. 会议地点：广州白云国际会议中心

3. 住宿酒店：广州白云国际会议中心

4、报到及注册地点：入住酒店的一楼大堂，会议开始后在会场注册。

5. 会议注册：

（1）注册费：粒子物理大会：教师和博士后2000元/人，学生1500元/人。会议可为随行人员提供会议用餐，收费标准为1000元/人。战略研讨会注册费：500元/人。

（2）会议注册：

        请使用中文进行注册，并确保姓名、单位信息、税号等信息的准确，以便于开发票。

（3）注册截止时间：2026年5月31日；报告摘要提交截止时间：2026年5月20日。

        鉴于7月份为广州旅游旺季，请拟参会人员务必按时注册和提交报告和摘要。

6. 地方会务组联系人：

卫敏杰（会务秘书）  电话: 020-39337116 (办公室), Email: weiminjie@scnu.edu.cn

王倩（会务协调人）电话: 020-39337116 (办公室), Email: qianwang@m.scnu.edu.cn

7. 高能物理分会秘书处联系人：

邱  雯（分会秘书）  电话：010-88235843(办公室), Email：qiuw@ihep.ac.cn

赵  强（分会秘书长）电话：010-88236578(办公室), Email：zhaoq@ihep.ac.cn

 

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会议手册.pdf

岭客汇订房系统操作指南.pdf

白云国际会议中心附近酒店推荐.pdf

第三轮会议通知.pdf

第二轮会议通知.pdf

第十四届“晨光杯”青年优秀论文专家评阅意见表.docx

第十四届“晨光杯”青年优秀论文申报、推荐意见表.docx

Monday, 13 July

14:00 → 21:00 高能物理战略研讨会报到

19:00 → 21:00 DRD探测技术国际合作交流会

Tuesday, 14 July

08:30 → 12:00 高能物理战略研讨会

Conveners: 主持人1：赵强 (Institute of High Energy Physics, Chinese Academy of Sciences) , 主持人2：黄性涛 (Shandong University)

08:30 分会领导致辞

08:40 CEPC规划和国际合作态势（40+20 mins）

Speaker: 娄辛丑 (高能所)

09:40 STCF规划和进展（40+20 mins）

Speaker: 彭海平 (USTC)

10:40 茶歇

11:00 BEPCII升级和高能所未来发展规划（40+20 mins）

Speaker: 曹俊

12:00 → 14:00 午餐

14:00 → 21:00 粒子物理大会报到

14:00 → 18:00 高能物理战略研讨会

Conveners: 主持人1：曹庆宏 (Peking University) , 主持人2：高原宁 (Peking University)

14:00 锦屏地下实验进展和未来规划（40+20 mins）

Speaker: 岳骞

15:00 综合讨论-I

16:00 茶歇

16:20 综合讨论-II

18:00 → 20:00 晚宴

Wednesday, 15 July

08:30 → 12:00 粒子物理大会

Conveners: Session-1 Chair: 王恩科 (South China Normal University) , Session-2 Chair: 赵政国 (USTC)

08:30 开幕式

09:00 高能物理分会工作报告

Speaker: 王贻芳 (中国科学院高能物理研究所)

09:30 中微子实验研究进展

Speaker: 贾怡 (高能所)

10:00 茶歇+合影

10:30 格点 QCD 研究进展

Speaker: 季向东 (上海交通大学)

11:00 STCF研究进展

Speaker: 郑阳恒 (中国科学院大学)

11:30 高能量前沿及探测器进展

Speaker: 何 苗 (中国科学院高能物理研究所)

12:00 → 14:00 午餐

14:00 → 18:10 分会1：TeV物理和超出标准模型新物理

Conveners: Chair1：曹庆宏 (Peking University) , Chair2：卢建新 (中国科学技术大学)

14:00 A fundamental understanding of QED vacuum and more

TBD

Speaker: Prof. JianXin Lu

14:20 Combination of ATLAS and CMS searches for Higgs boson pair production at 13 TeV

I will presents a combination of searches for Higgs boson pair (HH) production performed by the ATLAS and CMS Collaborations using Run 2 data.

Speaker: 瑞(Rui) 张(Zhang) (南京大学(Nanjing University))

14:32 Double Higgs searches at CMS

The study of Higgs boson pair production provides direct access to the structure of the Higgs potential and is one of the key probes of electroweak symmetry breaking at the LHC. In the Standard Model, Higgs boson pairs are produced with a very small cross section, making this measurement experimentally challenging. At the same time, this process is highly sensitive to possible contributions from physics beyond the Standard Model, including modifications of the Higgs self-coupling, anomalous interactions in effective field theory interpretations, and the production of new resonances decaying into a pair of Higgs bosons.

This talk presents an overview of searches for Higgs boson pair production performed by the CMS experiment. A broad range of final states is covered, exploiting the complementary sensitivity of channels involving b quarks, photons, W and Z bosons, tau leptons, and multilepton signatures. The talk summarizes the combination of multiple final states, constraints on the Higgs boson self-coupling and effective field theory parameters, and the prospects for future improvements with larger datasets and upgraded analysis techniques.

Speaker: Jin Wang (IHEP)

14:44 Evidence for the dimuon decay of the Higgs boson and search for Higgs pair production with bb𝜏𝜏 final state at ATLAS

In this talk, I will present the latest results on the search for Higgs boson decaying into dimuon final state as well as the search for Higgs boson pair production using bb𝜏𝜏 final state at the ATLAS experiment. In addition, I will present the corresponding HL-LHC projection results based on the latest analysis strategy.

Speaker: Yanlin (彦麟） Liu (刘） (Shandong University)

14:56 Search for X-> HH ->WWgammagamma

The H→γγ decay channel provides a clean final-state topology that allows the mass of a Higgs boson to be reconstructed with high precision. The H → WW has the second-largest Higgs branching fraction. This presentation will show the first CMS results of a search for resonant di-Higgs production, X → HH, where one Higgs boson decays to a diphoton pair and the other decays to WW, using CMS data.

Speaker: 绍炜 宋 (高能所)

15:08 Search for HH->bbgammagamma at CMS

A search for di-Higgs boson production in the HH→bbγγ channel is presented using proton-proton collision data collected by the CMS experiment. Combining the large H→bb branching fraction with the excellent diphoton mass resolution of CMS, this channel provides strong sensitivity to the Higgs self-coupling and potential beyond-Standard-Model signatures. The analysis strategy and its sensitivity to the Higgs self-coupling modifier $\kappa_\lambda$ are discussed.

Speaker: Chuxue Yang (Peking University)

15:20 The Higgs Study of the 2HDM+S under LHC and precision measurement

The 2HDM+S is the singlet extension of the two-Higgs-doublet model (2HDM). The singlet field and its mixing with the 2HDM Higgs sector lead to new contributions to the electroweak precision observables, in particular, the oblique parameters, as well as the direct searches of BSM Higgs In this work we performed a systematic investigation of the impacts of each mixing angle on the oblique parameters. We identified five benchmark cases, where at most one mixing angle was nonzero, and analyzed the 95% C.L. allowed parameter space using the oblique parameters. We also studied the non-alignment limit of the 2HDM+S, which typically has tighter constraints on the masses and mixing angles. We will also show the results from LHC direct searches and compare the 2HDM+S and 2HDM.

Speaker: Prof. Wei Su (Sun Yat-Sen University)

15:32 茶歇

16:00 Entanglement in Electroweak Physics

TBD

Speaker: Qing-Hong Cao (Peking University)

16:20 Measurements of Z-boson pair entanglement in decays of Higgs bosons at the ATLAS experiment

Entanglement is a key property of quantum systems. In this study, the first measurements of quantum entanglement between spins in pairs of Z bosons are reported, using proton-proton collision data from the Large Hadron Collider (LHC) at center-of-mass energies of 13 TeV and 13.6 TeV, recorded with the ATLAS detector. Measurements of angular observables sensitive to ZZ spin-density-matrix elements in the H->ZZ->4l process yield coefficients C2,1,2,-1 = -0.71 ± 0.45 and C2,2,2,-2 = 0.08 ± 0.44, consistent with their Standard Model predictions. A complementary hypothesis test using the full angular distribution, and relying on several Standard Model assumptions in the decays, provides substantially higher sensitivity to quantum correlations and disfavors the separable-state hypothesis at a significance of 4.7 standard deviations (expected 4.9 sigma) relative to the entangled Standard Model hypothesis. These results provide strong evidence of quantum entanglement between massive bosons (spin qutrits) at the electroweak scale.

Speaker: Mingyi Liu (USTC)

16:40 Toward quantum simulations of sphaleron dynamics at colliders

Sphaleron dynamics in the Standard Model at high-energy particle collisions remains experimentally unobserved, with theoretical predictions hindered by its nonperturbative real-time nature. In this work, we investigate a quantum simulation approach to this challenge. Taking the 1+1D $O(3)$ nonlinear $\sigma$-model as a protocol towards studying dynamics of the sphaleron in electroweak theory, we identify the sphaleron configuration and establish lattice parameters that reproduce continuum sphaleron energies with controlled precision. We then develop quantum algorithms to simulate sphaleron evolutions where quantum effects can be included. This work lays the ground to establish quantum simulations for studying the interaction between classical topological objects and particles in the quantum field theory that are usually inaccessible to classical methods and computations.

Speaker: 昊 ZHANG (Institute of High Energy Physics, Chinese Academy of Sciences)

16:52 近产生阈的费米子对自旋纠缠

本报告将以LHC上的 toponium 和 BES上的 psi(2S)->tau tau为例，介绍 t tbar 之间，以及 tau+ tau- 之间的自旋纠缠相关理论预言和实验测量方案。

Speaker: 由凯 王 (陕西师范大学)

17:04 Measurement of spin correlations induced by gluon polarization in parton showers with CMS

A study of angular correlations inside jets induced by gluon polarization is performed using proton-proton collisions at a center-of-mass energy of \sqrt{s} = 13.6 TeV. The data correspond to an integrated luminosity of 34.7 fb^{-1}, collected in 2022 with the CMS detector at the LHC. The details of the parton shower are investigated using jets reconstructed with the anti-k_\mathrm{T} algorithm and subsequently declustered with the Cambridge-Aachen algorithm. A novel analysis technique is developed to identify characteristic features of the jet substructure and to select intermediate gluon splittings into quark-antiquark pairs. An observable sensitive to gluon polarization in the parton shower is measured and compared with PYTHIA 8 and HERWIG 7 model predictions, with and without angular correlations induced by the gluon spin. The results are consistent with models that incorporate gluon polarization and strongly disfavor those that neglect them.

Speaker: Shuangyuan Wang (Zhejiang University)

17:16 利用单点能量关联函数（OPEC）探测核子的横向性分布

基于我们的工作 Phys. Rev. Lett. 136 (2026) 15, 151902，我们提出一种探测核子横向性分布 $h_1^q$ 的新方法，即利用单点能量关联函数（one-point energy correlator，OPEC）这一红外与共线安全的喷注亚结构观测量。我们证明，在横向极化 $p^\uparrow p$ 对撞中，OPEC 会产生具有清晰 $\sin(\phi_s-\phi_n)$ 角依赖形式的单自旋不对称性。与传统通过末态强子横向动量 $j_\perp$ 测量横向性分布的方法相比，该方法能够在角度 $\theta_n$ 上于更宽的运动学范围内探测不对称性，从而建立一个互补且系统上不同的研究通道，用于在 RHIC 以及未来电子—离子对撞机上研究核子的三维结构。

Speaker: Dr 婉辰 李 (复旦大学)

17:28 UV-HEFT matching

Compared with SMEFT, HEFT is applicable to a broader class of spontaneous symmetry breaking scenarios. However, its non-linear structure and the fact that HEFT is formulated directly in the broken phase make UV-HEFT matching more challenging. In the first part of this talk, we present a non-linear framework for ultraviolet theories that is particularly suitable for implementing UV-HEFT matching with functional methods. Building on this framework, we then show in the second part, through comparisons among different HEFT formulations, that primary HEFT (pHEFT) preserves maximal UV information and can serve as a precision benchmark for UV-HEFT matching. pHEFT therefore provides a universal matching scheme that is well suited for the automation of UV-HEFT matching.

Speaker: Prof. xia wan (Shaanxi Normal University)

17:40 Search for Soft Unclustered Energy Patterns containing muons in the final state in pp collisions at 13 TeV with the ATLAS detector

Soft unclustered energy patterns (SUEPs) are characterized by high-multiplicity, isotropic distributions of low-momentum particles. The search for SUEPs containing muons in the final state is presented using 140 fb^−1 of proton–proton collision data collected by the ATLAS detector at the Large Hadron Collider during 2015–2018. The analysis targets SUEP signatures produced via gluon–gluon fusion of a scalar mediator in Hidden Valley scenarios. This is the first result in the ATLAS experiment.

Speaker: 力钢 夏 (Nanjing University)

17:52 Four-top-quark production in final states with hadronically decaying tau leptons and search for vector-like leptons at √s = 13 TeV

The first study of four top quark production in final states with hadronically decaying tau leptons (τh) is presented using proton-proton collision data collected by the CMS experiment at a center-of-mass energy of 13 TeV during the 2016–2018 period at the CERN LHC. This dataset corresponds to an integrated luminosity of 138 fb−1. Tau lepton final states provide sensitivity to BSM scenarios with enhanced thirdgeneration couplings and complement established multilepton searches. The analysis is divided into subchannels with one τh and zero, one, or two additional electrons and muons to optimize sensitivity. Combining the three channels, the observed (expected) significance of the measured t¯tt¯t signal with respect to the standard model background-only hypothesis is 1.1 (1.0) standard deviations. The production cross section of four top quarks is measured to be 16+14−12 (stat)+12−8 (syst) fb. Additionally, a search is performed for vector-like leptons within the framework of the 4321 model in the same τh phase space. No significant excess is observed, and a lower limit of 830 GeV is set at 95% confidence level on the vector-like lepton mass, providing the first constraints from final states containing electrons and muons.

Speaker: UNKNOWN 华慧玲

14:00 → 18:10 分会2：强子物理与味物理

Conveners: Chair1：何吉波 (UCAS) , Chair2：梁剑 (华南师范大学)

14:00 LHCb实验最新进展

位于欧洲核子研究中心（CERN）的 LHCb 实验通过对底强子和粲强子的精确测量，针对CP破坏和强子谱学等前沿课题进行研究，理解标准模型、探索新物理。本报告将概述LHCb前沿课题，重点介绍 LHCb 实验在重味强子CP破坏及谱学等研究领域的前沿进展。

Speaker: Yanxi Zhang (Peking University)

14:20 LHCb实验上CP破坏最新进展

LHCb实验国际合作组近日发布了多项关于CP破坏的重要研究成果，深度解析了标准模型下的物理机制与动力学过程。这些最新进展包括：利用底强子至开放粲强子衰变给出的$\gamma$角与粲混合参数的最新组合测量值，进一步锁定了这一检验标准模型的“标准烛光”；对无粲三体衰变 $B^+ \to K^+ \pi^+ \pi^-$ 进行的精密振幅分析，成功解决了 $K^*_0(1430)^0$ 分支比等长期存在的理论疑点，并首次观测到包括自旋-3共振态在内的六种全新CP破坏现象；以及在 $D^+ \to \phi \pi^+$ 和稀有衰变 $B^0 \to K_S^0 \mu^+ \mu^-$ 中对新物理迹象的系统搜寻，并结合 $B^0 \to J/\psi \rho^0$ 等通道的研究，实现了对 $B_s^0$ 混合相位测量中企鹅图贡献的有效控制，等等。这一系列高度互补的实验成果，不仅在多维度上强化了对CP破坏机制的严格检验，也为理解宇宙物质-反物质不对称性起源提供了更为关键的实验依据。

Speaker: 晓凡 胡 (清华大学)

14:35 Recent highlights from the Belle II experiment

This talk is an overview of recent Belle II results on measuring the CKM matrix elements, LFU, CPV, and hadron spectroscopy.

Speaker: 璐 曹 (复旦大学)

14:50 Flavor-Spin Entanglement and the Weak Phase Extraction in $\Lambda_b\to\Lambda D$

Recently we have seen the emerging entanglement frontier at colliders, mainly focusing on spin-spin and/or flavor-flavor entanglement. In this talk, I'll introduce a new pattern, i.e., spin-flavor entanglement in $\Lambda_b\to\Lambda D$. I will then argue how this entanglement is essential for an alternative, while in the meantime, a precision determination of the weak phase.

Based on 2605.09682

Speaker: Yong Du (IMP CAS)

15:05 重介子半轻衰变与CKM矩阵元的理论研究

本报告将介绍重介子半轻衰变的理论研究进展，并讨论通过该类过程实现CKM矩阵元精确测量的前景。

Speaker: Shan Cheng (Hunan University)

15:20 Measurements of |Vcd(s)|, decay constants, and form factors in (semi)-leptonic D decays at BESIII

The BESIII experiment has collected 20.3 fb-1 and 7.33 fb-1 of e+e- collision data at center-of-mass energies of 3.773 GeV and 4.128-4.226 GeV, respectively. This presentation will provide an overview of recent studies using (semi)-leptonic D decays at BESIII. We will present the first experimental investigation of Ds+ to l+ nu decays, along with improved measurements of the CKM matrix elements |Vcd| and |Vcs|, and the decay constants fDs+ and fD+ via Ds+/D+ to mu+ nu and tau+ nu decays. Furthermore, we will summarize the most precise results for the transition form factors in D(s) to K, D to pi, and D(s) to eta(') decays. Complementing these leptonic studies, we will discuss progress in semileptonic analyses, including amplitude analyses and branching fraction measurements of D(s) to hh l+ nu and hhh l+ nu processes. These studies explore the hadron spectrum through scalar (a0, f0, sigma), vector (K, phi), and axial-vector (K1, b1) mesons, and will present experimental results for form factors in decays such as D to a0(980), D to sigma, D to K*, Ds to f0(980), and Ds to phi.

Speaker: Xueyin Liu (Wuhan University)

15:35 Search for charm rare decays at BESIII

The BESIII experiment has collected 10 billion J/ψ events and 2.7 billion ψ(3686) events. The huge charmonium data samples allow us to search for rare decay processes allowed in the standard model and new physics beyond the standard model. In this talk, we report the search for charged lepton flavor violation process ψ(3686)→eμ, charmonium weak decay processes J/ψ→γD0, J/ψ→D0μ+μ-, J/ψ→D0K0*, J/ψ→Dseν, J/ψ→Dsρ/Dsπ and ψ(3686)→Dsρ/Dsπ. The results of searching for FCNC processes Ds+→h(h')e+e- and D→h(h^('))e+e-will also be presents.

Speaker: Guangyi Zhang (Henan Normal University)

15:50 茶歇

16:20 核子自旋结构的第一性原理研究

核子自旋结构是理解强相互作用非微扰动力学的重要问题之一。本报告将介绍我们利用格点 QCD对核子部分子分布函数及其自旋相关物理量的第一性原理研究。首先，我们在大动量有效理论框架下计算核子的非极化和螺旋度 PDF，并重点讨论极化比值 $\Delta q/q$ 以及纵向自旋不对称性 $A_1^p$、$A_1^n$。这些比值能够直接刻画不同味道夸克在给定动量分数下与核子自旋同向或反向的程度，是连接格点 QCD、整体拟合和极化深度非弹散射实验的重要物理量。其次，我将介绍我们对夸克TMDPDFs的计算，包括非极化分布、Boer-Mulders 函数、螺旋度分布和 worm-gear 分布等。这些结果为从一维动量结构到三维横动量依赖结构理解核子自旋提供了新的第一性原理信息，并为未来 JLab 和 EIC 等极化实验提供第一性原理的理论参考。

Speaker: 其安 张 (Shanghai Jiao Tong University)

16:40 PDF @ lattice QCD

格点QCD 计算PDF的最新进展

Speaker: sun peng (IMP)

16:55 Gradient Flow in Heavy Flavor Physics

Gradient flow provides a powerful framework for smoothing gauge fields over an auxiliary flow time, systematically suppressing ultraviolet fluctuations while preserving the long-distance physics of QCD. In lattice gauge theory, this has led to improved definitions of renormalized observables, precise scale setting, and new strategies for controlling discretization and renormalization effects. This talk will briefly introduce the basic idea of gradient flow and discuss its potential applications in heavy flavor physics, where precision calculations of charm- and bottom-quark observables are essential. Possible directions include improved determinations of heavy-light matrix elements, form factors, decay constants, and operator renormalization, renormalon subtraction as well as applications to effective theories such as HQET. By reducing ultraviolet noise and offering clean nonperturbative definitions of flowed operators, gradient flow may provide new tools for addressing some of the key systematic uncertainties in heavy flavor phenomenology.

Speaker: Dr 翔鹏 王

17:10 Three-dimensional helicity distribution functions and EicC projections

The three-dimensional helicity distribution function is an important probe of the nucleon spin structure. In this talk, we will present recent phenomenological progress on this distribution and discuss projection studies for the future Electron-ion collider in China (EicC). Based on the expected kinematic coverage and experimental conditions of EicC, we evaluate the sensitivity of semi-inclusive deep-inelastic scattering measurements to the three-dimensional helicity distribution function and examine the impact of different kinematic regions on its extraction. These studies show that EicC can provide valuable constraints on the three-dimensional spin structure of the nucleon.

Speaker: Dr 科 杨 (山东大学)

17:25 Hardon Spectroscopy at LHCb

The LHCb experiment, with its unique forward acceptance, excellent vertex resolution, and powerful particle identification, has revolutionized the study of hadron spectroscopy. It provides a unique laboratory for probing the full spectrum of hadronic matter, from conventional states to exotic multiquark configurations, thereby offering profound tests of Quantum Chromodynamics (QCD) in both the heavy-quark and non-perturbative regimes. This presentation will provide a comprehensive overview of the most recent and salient results from the collaboration. The discussion will encompass groundbreaking studies of conventional hadrons, including the spectroscopy of doubly-heavy baryons, as well as the discovery and characterization of exotic states such as tetraquarks and pentaquarks. These advances, derived from the full LHC Run 1 and Run 2 datasets, sharpen our understanding of the strong interaction. An outlook on the continued exploration with the unprecedented statistics of Run 3 will also be presented.

Speaker: 赞 任 (UCAS)

17:40 Fragmentation function studies at BESIII

Fragmentation Function (FF) plays a crucial role in describing the hadronization process. We report the measurements of normalized differential cross sections of inclusive pi0 and Ks production as a function of hadron momentum at six energy points with q^2 transfer from 5 to 13 GeV^2 at BESIII. The results with a relative hadron energy coverage from 0.1 to 0.9 significantly deviate from several theoretical calculations based on existing fragmentation functions.

Speaker: Linqin Huang (Institute of Modern Physics)

17:55 Observation of a family of all-charm tetraquarks with spin-2 and positive parity

Three structures, denoted as X(6600), X(6900), and X(7100), have been observed in the J/\psi J/\psi mass spectrum and are interpreted as candidates for a family of fully-charm tetraquark states. Using proton-proton collision data collected by the CMS detector corresponding to an integrated luminosity of 315 fb(^{-1}), the J/\psi J/\psi spectrum is studied with substantially improved statistical precision. All three structures, as well as their interference, are found with statistical significances exceeding five standard deviations. The observed interference indicates that these states share common quantum numbers. Their squared masses show an approximately linear dependence on the resonance index, while their natural widths decrease systematically with increasing index, suggesting a pattern consistent with radial excitations of tetraquarks composed of two aligned spin-1 diquarks without orbital excitation. Complementary studies in the J/\psi\psi(2S)\to\mu^+\mu^-\mu^+\mu^- final state further reveal structures associated with the X(6900) and X(7100) states. This talk further presents a dedicated spin-parity analysis of the near-threshold structures in the fully-charm tetraquark sector using the J/\psi J/\psi\to4\mu final state. A matrix-element-based approach is employed to test multiple J^P hypotheses, including (0^+), (0^-), (1^+), (1^-), (2^+), and (2^-), based on the kinematic distributions of the four-muon system. The primary analysis uses decay-only observables, while production angular distributions are also examined as a consistency test. The results favor the quantum-number assignment J^{PC}=2^{++}, establishing the first spin-parity determination of a fully-charm tetraquark family at a hadron collider and providing important constraints on the internal structure and excitation pattern of exotic hadrons.

Speaker: 胡震 (Tsinghua University)

14:00 → 18:05 分会3：高能重离子物理

Conveners: Chair1：张本威 (Central China Normal University) , Chair2：徐庆华 (Shandong University)

14:00 Jet quenching and EEC in Heavy ion collisions

Speaker: Wen-Jing Xing (University of South China)

14:25 利用宇宙线大气簇射进行强相互作用研究

高能宇宙线核子与大气分子碰撞，形成广延大气簇射过程，大气簇射的末态粒子可以提供核-核碰撞的强作用过程的关键信息。我国高山宇宙线观测站LHAASO，可以在甚高能宇宙线大气簇射发展最大处，精确测量大气簇射产生的电磁粒子和缪子，为研究核-核碰撞的强作用过程提供了可能。本报告将基于LHAASO实验的数据，研究大气簇射次级粒子中缪子丰度和涨落、缪子的横向分布行为，并通过簇射缪子丰度随天顶角的变化，研究簇射缪子丰度的衰减行为；通过与不同强作用模型的模拟结果进行比较，对强作用模型进行检验；我们还将展示利用大气簇射进行夸克胶子等离子体研究的可行性的初步结果。

Speaker: 存峰 冯 (山东大学)

14:40 Unveiling the medium-induced jet angular broadening in high-energy nuclear collisions

Medium modification of jet substructure in the hot and dense nuclear matter has garnered significant interest from the heavy-ion physics community in recent years. Measurements of inclusive jets show an angular narrowing in nucleus-nucleus collisions, while recent CMS results for photon-tagged jets ($\gamma$+jets) suggest evidence of broadening. In this study, we conduct a theoretical analysis of the angular structure of inclusive jets and $\gamma$+jets using a transport approach that accounts for jet energy loss and medium response in quark-gluon plasma. We examine the girth modification of $\gamma$+jets in $0-30\%$ PbPb collisions at $\sqrt{s_{NN}} = 5.02$ TeV, achieving good agreement with recent CMS measurements. We explore the relationship between selection bias and jet kinematics by varying the threshold for $x_{j\gamma} = p_T^{\rm jet}/p_T^{\gamma}$. Notably, we quantitatively demonstrate that $\gamma$+jets significantly reduce selection bias and can effectively select jets that have been sufficiently quenched in PbPb collisions, which is crucial for capturing the jet angular broadening. Additionally, we estimate the contributions of medium-induced gluon radiation and medium response to the broadening of the jet angular substructure. Finally, we analyze the modification patterns of jet $R_g$ and $\Delta R_{\rm axis}$ in PbPb collisions, which indicate slight broadening for $\gamma$+jets and noticeable narrowing for inclusive jets compared to pp collisions.

Speaker: Sa Wang (China Three Gorges University)

14:55 Analysis of nuclear fragmentation functions for pions with $A$ and $\nu$ dependence

We present a systematic QCD analysis of pion nuclear fragmentation functions (nFFs), which encode nuclear modifications to hadronization in high-energy nuclear collisions. Within this framework, both the vacuum fragmentation functions and their nuclear corrections are extracted simultaneously. The extracted nuclear modifications are parameterized as functions of the mass number A, the virtual-photon energy \nu in the laboratory frame, and the hadron momentum fraction z, allowing their dependence on these variables to be quantified. Our analysis includes semi-inclusive deep-inelastic scattering data on nuclear targets, with kinematic cuts chosen to ensure the applicability of perturbative QCD and collinear factorization. The resulting fit provides a good description of most datasets, with the nFFs well constrained in the momentum fraction range z in [0.2, 0.7]. Additionally, with our new nFFs, we present NLO predictions in proton–proton and proton–nucleus collisions, which show good agreement with ALICE data.

Speaker: Mengyang Li (SCNU)

15:10 Study of jet modifications using ALICE Run 3 data at LHC

Measurements of jet modifications when they traversing the hot medium provide critical insights into the Quark-Gluon plasma, which manifest themselves in jet energy loss and substructure modifications. In this talk, we will present the measurements of jet modifications with ALICE experiment. We employ a variety of analysis techniques to extend the measurements to lower jet pT. In addition, taking advantage of the major upgrades to the AlICE detector in Run 3, nuclear modifications and collective effects could be studied with improved precision. We also intend to search for jet quenching signatures across different collision systems. These measurements will quantify jet quenching effects, enhancing our understanding of the jet energy loss mechanisms.

Speaker: 文卉 冯 (华中师范大学)

15:25 Jet Quenching and Multi-Point Energy Correlators in γ-Jet Production in High-Energy Heavy-Ion Collisions

Jet quenching is one of the most powerful probes for studying the transport properties of the quark-gluon plasma (QGP). In this work, we use the Linear Boltzmann Transport (LBT) model to study two related aspects of jet-medium interactions: photon-tagged jet observables and multi-point energy correlators.

The first part focuses on (\gamma)-jet production. We use recent CMS measurements in Pb+Pb collisions at (\sqrt{s_{\text{NN}}}=5.02) TeV, including the (x_{J\gamma}) distribution, the photon-jet azimuthal correlation, and the nuclear modification factor (I_{\text{AA}}), to constrain the effective strength of jet-medium interactions in the LBT model. With the same setup, we then make predictions for (\gamma)-jet observables in O+O collisions. In particular, we study how jet energy loss, associated subleading jets, and hadronization effects appear in this smaller collision system.

The second part studies energy-energy correlators (EECs) as jet substructure observables. We focus on the three-point energy-energy-energy correlator (EEEC) in the ((\xi, \phi)) shape space. The AA/pp ratio of the EEEC shows that the medium modification is not uniform over the three-point geometry. Instead, the modification is most pronounced in broad-angle and near-equilateral configurations. To understand where this structure comes from, we decompose the partonic EEEC into contributions from the vacuum jet shower, medium-induced gluon radiation, and collective medium response. By varying the coupling strength, the angular scale (R_L), and the energy-weighting parameter n, we find that radiation-related and medium-response-related triplets populate different regions of the EEEC shape space. This decomposition helps clarify how perturbative shower modification and wake-like medium response contribute to multi-point jet correlations.

Together, these two studies examine different sides of jet quenching within the same transport framework. The (\gamma)-jet analysis is aimed at constraining the overall energy-loss phenomenology and making predictions for O+O collisions, while the energy-correlator study uses jet substructure to probe the angular pattern and microscopic origin of the medium modification.

Speaker: Hao Wang (华南理工大学)

15:40 茶歇

16:10 FRG approach to the QCD phase diagram

Speaker: 伟杰 付 (大连理工大学)

16:35 相对论重离子碰撞中的光子探针

Speaker: CHI YANG (Shandong University)

17:00 Dynamical fluctuations of net-baryon density near the QCD critical point

Exploring the QCD phase transition is one of the most important goals in relativistic heavy-ion collisions. The Beam Energy Scan Program at RHIC has revealed a preliminary non-monotonic behavior of net-proton multiplicity fluctuations with increasing collision energy [1], which is consistent with theoretical predictions [2].

However, the quark-gluon plasma created in relativistic heavy-ion collisions is a complex system, where multiple physical effects may distort theoretical predictions of net-proton multiplicity fluctuations. In particular, realistic dynamical modeling incorporating experimental conditions near the QCD phase transition is indispensable for ultimately identifying the QCD phase transition in heavy-ion collision experiments. As a most relevant degree of freedom in the vicinity of the QCD critical point, the dynamical behavior of conserved baryon density has attracted extensive attention [3-5]. Nevertheless, a fully realistic framework capable of describing the dynamical evolution of non-Gaussian fluctuations over the entire QCD phase diagram remains far from complete.

Using the deterministic equations that govern the non-Gaussian fluctuation dynamics of baryon density [6], we systematically explore the time evolution of baryon density fluctuations [7] across the QCD phase diagram that constructed via the functional renormalization group approach [8]. Our results reveal that critical slowing down induces a more suppression of the non-monotonic behavior of kurtosis with varying collision energies. Furthermore, we also investigate the extended diffusion framework within Maxwell-Cattaneo theory that incorporates finite relaxation time corrections [9]. This mechanism is found to exert substantial impacts, most notably shifting the peak position of non-monotonic kurtosis toward higher baryon chemical potential.

[1] STAR Collaboration, Phys.Rev.Lett. 135, 142301(2025)
[2] M.Stephanov, arXiv:2410.02861
[3] M.Sakaida, M.Asakawa, H.Fujii, M.Kitazawa, Phys.Rev.C 95, 064905 (2017)
[4] G. Pihan, M.Bluhm, M.Kitazawa, T. Sami, M.Nahrgang, Phys.Rev.C 107,014908 (2023)
[5] S.Wu, Phys.Rev.C 111 (2025) 014915
[6] X. An, G. Ba¸sar, M. Stephanov, and H.-U. Yee, Phys. Rev. Lett. 127, 072301 (2021)
[7] S.Wu, S.Yin and W.-j. Fu, in preparation.
[8] W.-j., X. Luo, J.M. Pawlowski, F. Rennecke, S. Yin, Phys. Rev, D 111, L031502 (2025)
[9] N. Abbasi, X. An and S.Wu, to appear

Speaker: Shanjin Wu (Dalian University of Technology)

17:15 Azimuthal modulation in light-by-light scattering from ultraperipheral collisions

Elastic light-by-light (LbL) scattering in ultraperipheral collisions (UPCs) of relativistic heavy ions provides a unique testing ground for Quantum Electrodynamics and searches for Beyond Standard Model (BSM) physics. We investigate the impact of linearly polarized coherent photons on the azimuthal angular correlations of the final-state photons. We demonstrate that the linear polarization generates a significant cos 2ϕ modulation in the Standard Model background. Crucially,we identify a highly non-trivial invariant mass dependence of the cos 2ϕ and cos 4ϕ azimuthal asymmetries in the vicinity of a massive axion-like particle (ALP) resonance. This distinct signature offers a clean and direct window to search for BSM particles in UPCs, potentially enhancing the sensitivity of future searches at the LHC and EIC.

Speaker: 硕 林 (山东大学)

17:30 Study on the Deconfining Phase Transition under Real Rotation with the Matrix Model

We construct the matrix models under real rotation $\Omega$ in a cylinder of radius $\mathcal{R}$, with $\mathcal{R} \Omega<1$ to preserve causality, by using the background field effective theory.
Based on this improved matrix model, we investigate the confinement/deconfinement phase transition in $SU(3)$ and $SU(2)$ gauge theories. Different from the case of imaginary rotation, considering only the perturbative effects of the gluonic system is insufficient to drive it into the confined phase. Nevertheless, Rotation introduces radial inhomogeneity, and the behavior of the phase transition temperature $T_c$ and Polyakov loop $\ell$ are model-dependent. With the gluonic effective mass $M$ is a constant, $T_c$ decreases with radial distance $\tilde{\rho}$ and $\Omega$, and the local $T_c$ along rotation axis of $SU(3)$ in particular does not depend on $\Omega$ within a few percent accuracy. $\ell$ increases with $\tilde{\rho}$, while the dependence of it on $\Omega$ exhibits a strong temperature dependence. The introduction of $M(w)$ does not qualitatively affect the radial dependence of $T_c$ and $\ell$. However, it does qualitatively modify their behavior at small $\Omega$. Notably, $T_c$ exhibits a nonmonotonic dependence on $\Omega$, which we attribute to the competition between rotation-induced centrifugal effects and the non-perturbative contributions associated with $M(\Omega)$. Surprisingly, the radial dependence of the fitted $T_c(\tilde{\rho})$ is identical to that with $M$ is a constant.

Speaker: Dr Qianqian Du

17:45 (Net-)Proton Number Fluctuations in Au+Au Collisions from RHIC-STAR

In the search for the conjectured QCD critical point, higher-order cumulants of conserved quantities have been proposed as sensitive observables and have been studied extensively, both experimentally and theoretically. Recently, a precision measurement [1] of net-proton number fluctuations by the STAR Collaboration was published, focusing on high-statistics Au+Au collision datasets at $\sqrt{s_{NN}}$ = 7.7-27 GeV from the RHIC Beam Energy Scan II program. The measured net-proton $C_{4}/C_{2}$ ratio exhibits a minimum around 19.6 GeV relative to non-critical baselines, which is expected to be a characteristic signature of the QCD critical point. However, a comprehensive measurement of the collision energy dependence, especially at lower energies $\sqrt{s_{NN}} < $7.7 GeV, is needed to establish the existence of the critical point.

In this talk, we present new measurements of (net-)proton fluctuations in Au+Au collisions at $\sqrt{s_{NN}}$ = 3.0-27 GeV using a centrality-dependent method [2]. We compare our results with transport model calculations and discuss the physics implications regarding the QCD critical point.

[1] B. E. Aboona et al. (STAR), Precision Measurement of Net-Proton-Number Fluctuations in Au+Au Collisions at RHIC, \href{https://doi.org/10.1103/9l69-2d7p}{Phys. Rev. Lett. 135, 142301 (2025)}

[2] Z. Wang and X. Luo, A centrality-independent framework for revealing genuine higher-order cumulants in heavy-ion collisions, \href{https://doi.org/10.1016/j.physletb.2025.139984}{Physics Letters B 871, 139984 (2025)}

Speaker: Yu Zhang (Guangxi Normal University)

14:00 → 18:00 分会4：中微子物理、粒子天体物理与宇宙学

Conveners: Chair1：贾怡 (高能所) , Chair2：黄永波 (Guangxi University)

14:00 Progress of the JUNO-TAO Experiment

The Taishan Antineutrino Observatory (TAO) is a satellite experiment of JUNO, featuring a ton-scale liquid scintillator detector located about 44 m from a reactor core at the Taishan Nuclear Power Plant. TAO detects reactor antineutrinos via inverse beta decay (IBD). An array of silicon photomultipliers (SiPMs) with high photocathode coverage and photon detection efficiency provides a high light yield. The SiPM dark noise is suppressed by orders of magnitude by cooling the detector to −50 °C.

The primary goal of TAO is a precision measurement of the reactor antineutrino energy spectrum. TAO will provide a high-resolution reference spectrum for JUNO, reducing the impact of reactor-flux and spectral-model uncertainties on oscillation analyses, and will offer a valuable benchmark for nuclear databases.

This talk presents TAO’s first precision measurement of the reactor antineutrino spectrum and summarizes the current experimental status and recent progress of the TAO experiment.

Speaker: Ruhui Li (IHEP)

14:20 TRIDENT: Progress Toward a Next-Generation Deep-Sea Neutrino Observatory

TRIDENT (海铃) is a next-generation deep-sea neutrino telescope currently under development in the South China Sea, aiming to investigate the high-energy Universe through the observation of astrophysical neutrinos. By instrumenting a multi-cubic-kilometre volume of seawater with advanced optical sensors with high photon detection efficiency and precise timing capabilities, TRIDENT is designed to achieve precise directional reconstruction together with efficient all-flavour neutrino detection across a broad energy range. The experiment will enable sensitive searches for astrophysical neutrino sources, studies of cosmic-ray acceleration mechanisms, and probes of neutrino properties and physics beyond the Standard Model. In recent years, the collaboration has made substantial progress in detector design, hardware development, simulation and reconstruction studies, and deep-sea site characterization, alongside preparations for the first in-situ detector deployments and the development of a broad neutrino and multi-messenger physics program. These efforts have established the scientific potential of the experiment and informed the staged realization strategy toward a future large-scale observatory. This talk will present an overview of the TRIDENT experiment's physics objectives, the detector concept and current status, including recent advances in detector R&D and deployment preparations. Together, these developments position TRIDENT to play an important role in the next generation of neutrino astronomy and multi-messenger astrophysics.

Speaker: Iwan Morton-Blake (Tsung-Dao Lee Institute, Shanghai Jiao Tong University)

14:40 RECODE for the Reactor Neutrino CEvNS Measurements and BSM Physics

We will report on the recent progress of the RECODE experiment and discuss its prospects for probing BSM physics.

Speaker: 永成 吴 (Nanjing Normal University)

14:48 通过参量荧光效应探测宇宙中微子背景

宇宙大爆炸约1秒后，中微子便从高温致密的等离子体中退耦，形成了宇宙中微子背景。随着宇宙膨胀，这些遗迹中微子温度已冷却至约1.95 K。由于中微子只发生弱相互作用，其直接探测一直极为困难。现有最受期待的背景中微子探测方案是PTOLEMY实验，但其探测灵敏度受到量子不确定性关系带来的本底限制。在这种情况下，相干散射方案重新受到关注。背景中微子的动量极低，使其能够与厘米尺度的宏观靶物质发生相干散射，使散射截面获得阿伏伽德罗常数量级的增强。然而，这一机制也带来了新的问题，反冲动量会平均分散到大量原子上，使得观测变得不可行。本报告将介绍一种新的背景中微子诱导的过程，利用宇宙背景中微子与低温原子或分子系统的相干散射，诱导其产生参量荧光效应（ν_i + M → ν_j + γ + M），通过探测辐射的红外光子来捕获遗迹中微子信号。当中微子传递给分子能级的能量与分子的能级差刚好匹配的时候，会发生共振现象，极高地提升该过程的反应概率。这为宇宙中微子背景的探测提供了一种新的可能思路。

Speaker: Guoyuan Huang (中国地质大学（武汉）)

15:08 基于江门中微子实验数月数据的反应堆中微子振荡分析

江门中微子实验（JUNO）是一个位于中国江门的多物理目标的中微子实验。JUNO的主要目标是通过观测反应堆中微子来测定中微子质量顺序，并高精度测量中微子振荡参数，包括sin$\theta_{12}$、$\Delta m^{2}_{21}$ 和 $\Delta m^{2}_{31}$。
JUNO的探测器由一个有效质量为2万吨的液体闪烁体中心探测器、一个兼作缪子反符合系统及放射性屏蔽层的水池，以及外层的塑料闪烁体顶部径迹探测器组成。经过十余年的探测器建设和八个月的联合调试阶段，JUNO于2025年8月底开始物理数据采集，并于11月发布了首批物理结果。
本报告将重点介绍基于JUNO运行数月后的反应堆中微子数据的振荡分析结果。

Speaker: 志源 陈 (高能所)

15:16 JUNO 弥散超新星中微子背景搜寻现状

弥散超新星中微子背景（DSNB）携带着宇宙中核塌缩超新星历史以及超新星中微子的重要信息。江门中微子实验（JUNO）凭借其大质量液体闪烁体靶、优异的能量分辨率和低本底优势，为通过反贝塔衰变道搜寻 DSNB 电子型反中微子提供了重要机遇。
本报告将介绍 JUNO 早期数据中 DSNB 搜寻的当前进展。该分析基于 DSNB 能区内的反贝塔衰变符合信号开展。针对主要本底成分进行了专门研究，包括大气中微子相互作用、快中子以及可能残余的宇宙线缪子相关本底。通过控制样本和蒙特卡罗模拟，对事例选择和本底建模进行验证。
当前观测到的候选事例样本在统计不确定度范围内与本底预期总体一致。基于现有分析框架， 给出了DSNB 流强的初步模型无关约束。随着数据量的增加、本底估计的进一步优化以及脉冲形状甄别技术的改进，未来的分析灵敏度有望进一步提升。

Speaker: 晓杰 罗 (高能所)

15:24 茶歇

15:54 锦屏中微子实验建设研发进展

中国锦屏地下实验室的垂直埋深为2400米，是进行低本底中微子实验的理想场所。锦屏中微子实验（JNE）团队将建造一个具有500立方米靶体积的中微子探测器，中心的亚克力容器直径10米，由双向绳网系统吊装在探测器屏蔽水箱中心，允许中微子探测靶材料的密度比屏蔽水高或低20%，安装新型的8英寸微通道板光电倍增管、快速模数转换器读出系统。JNE 实验将采用液体闪烁体，实现川藏地区的地球铀、钍中微子的测量。喜马拉雅山地区的地壳厚度达到70公里，地球铀、钍中微子的测量结果可以和目前的地球科学模型预期相对比，研究目前的地学预期的本征系统偏差，进而协助推测地幔的放射性热，协助推测原初地球的放射性热总能量。同时还在探索兼容的切伦科夫液体闪烁体，探索地球产热元素钾的丰度测量的可能性。铀钍为宇宙物质化学中的难熔元素，而钾元素为挥发性元素，钾元素的测量能给出更多的行星地球形成在太阳系历史中的信息。另外在探索液体闪烁体掺锂的情况，研究太阳电子中微子带电流过程的探测方法，研究太阳中微子振荡的物质效应的实验研究方法。

Speaker: Zhe Wang (Tsinghua University)

16:14 中微子味混合与味对称性的理论

中微子振荡实验已确认中微子具有非零质量并存在轻子味混合，然而中微子质量的起源、轻子混合的结构以及CP破坏的来源，至今仍是粒子物理中悬而未决的核心问题。味对称性被广泛视作理解轻子味结构的关键理论工具，其基本思想是引入作用在不同代费米子之间的对称性，约束轻子质量矩阵，从而解释观测到的混合参数。本报告将首先回顾当前实验给出的轻子混合参数。随后，梳理味对称性理论的发展脉络，重点讨论非阿贝尔分立味对称群在解释轻子混合图像中的作用。进而，阐述广义CP对称性与味对称性相结合如何有效增强理论预言能力。最后，报告将介绍近年来兴起的模对称性框架，并结合当前与未来中微子振荡实验的精密测量，展望味对称性理论在揭示中微子质量起源、轻子CP破坏乃至统一味问题等方面的发展前景。

Speaker: 才昌 黎 (西北大学)

16:34 JUNO探测器刻度和能量重建

江门中微子实验（JUNO）是当前国际上重要的大型中微子实验之一，旨在通过高精度探测反应堆中微子事例，开展中微子振荡及相关物理问题的研究。对于大型液体闪烁体探测器而言，准确理解探测器响应、建立稳定可靠的能量标度，并实现高精度能量重建，是保证实验物理结果可靠性的关键基础。

本报告将围绕JUNO探测器刻度和能量重建相关工作展开介绍。报告内容包括探测器刻度体系的总体思路、刻度数据在探测器响应研究中的作用，以及能量重建方法在数据处理和物理分析中的应用。通过综合利用刻度数据、探测器响应模型和重建算法，可以逐步建立对探测器空间响应、时间响应和能量响应的整体理解，并为后续物理分析提供必要的输入和约束。

报告还将简要讨论能量重建性能评估、系统不确定性控制以及相关工作对JUNO核心物理目标的支撑作用。上述研究对于提升JUNO实验的数据质量、完善分析流程和实现高精度中微子测量具有重要意义。

Speaker: 文杰 吴 (中国科学院近代物理研究所)

16:42 Two Beams, One Detector: MicroBooNE's Search for eV-scale Sterile neutrinos

The existence of three distinct neutrino flavors, with oscillations between them, has been established by several experiments over the past decades. However, anomalies observed in experiments such as LSND, MiniBooNE, and gallium source experiments have motivated the hypothesis of an additional neutrino state—a sterile neutrino—that does not interact directly with matter yet oscillates with the three known flavors (the 3+1 model). MicroBooNE was constructed, in part, to provide a definitive test of these anomalies. Located at Fermilab, MicroBooNE employs an 85-tonne active mass liquid argon time projection chamber neutrino detector. It can distinguish between photon and electron electromagnetic showers and select charged-current electron neutrino and muon neutrino events with exceptional performance. In this talk, I will present our latest results from MicroBooNE search for an eV-scale sterile neutrino in the 3+1 model. This analysis uniquely combines data from two accelerator neutrino beams, the on-axis BNB beam and the off-axis NuMI beam, observed in MicroBooNE's single detector. This dual-beam approach helps break degeneracies between electron-neutrino appearance and disappearance, thereby extending our 95% confidence-level exclusion coverage to most of the parameter space suggested by the LSND, MiniBooNE, and gallium experiments. We find no evidence for sterile neutrino oscillations and, consequently, establish world-leading constraints on the 3+1 model from a single experiment.

Speaker: Xiangpan Ji (School of Physics, Nankai University)

16:50 Searching for Dark Matter with TRIDENT

TRIDENT (海铃) is a next-generation deep-sea neutrino telescope under development in the South China Sea, designed to instrument several cubic kilometres of seawater with hybrid Digital Optical Modules. After a brief introduction to the experiment, I present sensitivity forecasts for dark matter annihilation in the Galactic Centre over the mass range 1–100 TeV. Using the full detector design and all-flavor neutrino interactions, we show that TRIDENT will reach an annihilation cross-section below the thermal freeze-out benchmark at 10 TeV, and that cascade events from electron and tau neutrino interactions provide greater sensitivity than the conventional muon track channel. We further demonstrate that diffuse Galactic neutrinos from cosmic-ray interactions with interstellar gas — a previously overlooked background — can degrade sensitivity by up to a factor of two above 10 TeV and potentially mimic a dark matter signal, highlighting an important systematic for future searches.

Speaker: 昕 向 (上海交大)

17:05 Collider Searches of Heavy Neutrinos to Test Neutrino Mass Orderings

The ordering of neutrino masses remains a key unknown in particle physics and cosmology. While upcoming oscillation experiments are expected to determine the mass ordering at low energies, it is important to explore complementary probes that access the underlying mechanism of neutrino mass generation. In this work, we show that future high-energy electron–positron colliders can provide sensitivity to the neutrino mass ordering through the lepton-flavor structure of heavy neutral lepton (HNL) interactions. In the minimal Type-I seesaw scenario with two nearly degenerate HNLs, the flavor composition of the heavy–light neutrino mixings is strongly correlated with the light-neutrino mass spectrum, leading to distinct collider signatures for normal and inverted mass orderings. We demonstrate that future $Z$ factories such as CEPC and FCC-ee can probe these flavor patterns over a wide region of parameter space, establishing collider searches for HNLs as a complementary approach to neutrino mass ordering studies.

Speaker: Wei（刘威） Liu (Nanjing University of Science and Technology（南京理工）)

17:20 Coherence in Neutrino Scattering: From New Physics to Relic Neutrinos

In this talk, I will discuss coherence effects in non-standard interactions and astrophysical environments. For nonstandard tensor interactions, contributions traditionally considered spin-suppressed can instead receive coherent enhancement within a complete nuclear response framework, leading to cross sections orders of magnitude larger than conventional expectations. In astrophysics, ultra-high-energy cosmic rays can boost relic neutrinos into the CEνNS regime, allowing coherent scattering effects to emerge at high energies. These results demonstrate the strong dependence of coherence effects on interaction structure and energy scale, with important implications for neutrino probes of new physics.

Speaker: Jiajun Liao (Sun Yat-Sen University)

17:35 Geoneutrino measurement in JUNO

The Jiangmen Underground Neutrino Observatory (JUNO) is a 20-kton liquid scintillator experiment located 650 meters underground in China. Its primary scientific goal is to determine the neutrino mass ordering through high-precision measurements of reactor neutrinos at a 52.5 km baseline. Beyond its core mission, JUNO’s large target volume and excellent detection performance make it a powerful detector for geoneutrinos. Geoneutrinos are produced by the decays of long-lived radioactive isotopes in the Earth’s interior, including uranium, thorium, and potassium. Due to the inverse beta decay threshold, JUNO is exclusively sensitive to geoneutrinos from the decay chains of 238U and 232Th. The geoneutrino flux is directly proportional to the abundances of U and Th, whose decays generate a major fraction of the Earth’s radiogenic heat, offering unique and direct constraints on the terrestrial energy budget and interior structure. This talk will present the geoneutrino analysis at JUNO using the latest data. JUNO’s capability to detect and analyze geoneutrino signals will be discussed, laying the foundation for future high-precision studies in both neutrino physics and geoscience.

Speaker: Qishan Liu (IHEP)

17:43 Theoretical Aspects of Neutrinoless Double-Beta Decay and Its Implications for New Physics

Neutrinoless double-beta decay provides a unique low-energy window into lepton-number violation, the Majorana nature of neutrinos, and physics beyond the Standard Model. This talk will give a concise overview of the theoretical framework for estimating its half-life, emphasizing the roles of phase-space factors, nuclear matrix elements, and particle-physics parameters. I will discuss the main theoretical uncertainties, especially those associated with nuclear matrix elements, short-range nuclear effects, and the possible quenching of the axial coupling. I will also explain how these uncertainties affect the interpretation of current and future experimental limits. Finally, I will highlight how neutrinoless double-beta decay can probe the effective Majorana mass, neutrino mass ordering, Majorana CP phases, and representative new-physics scenarios such as seesaw models.

Speaker: Jingyu ZHU

14:00 → 18:00 分会5：粒子物理实验技术

Conveners: Chair1：张慧 (高能所) , Chair2：黄性涛 (Shandong University)

14:00 CMOS-based detectors for LHCb and future Higgs factories

XXX

Speaker: Yiming 一鸣 Li 李 (IHEP)

14:20 环形对撞机中高粒度读出时间投影室TPC技术关键技术研究

环形正负电子对撞机（FCC-ee 与 CEPC）已被国际高能物理界提议作为 Higgs 玻色子与 Z 玻色子研究的下一代装置。在国际大科学装置（ILD）探测器概念及同类设计中，主径迹探测器均采用高精度时间投影室（TPC）作为核心方案，其空间分辨率约为 100 μm，工作于 3.0 T 超导螺线管磁场中。TPC 需实现动量分辨率达 10⁻⁴ (GeV/c)⁻¹，且粒子鉴别（PID）分辨率需优于 3%。TPC 技术在 Higgs 运行模式下性能优异，但在高亮度 Z-pole 运行条件下面临显著技术挑战，其可行性及应对策略需深入模拟和实验研究。
本报告将介绍高精度 TPC 作为 e⁺e⁻ 对撞机主径迹探测器的可行性及最新研究进展。基于束流本底模拟数据，系统研究了离子诱导空间电荷效应，深入评估了 TPC 技术挑战及潜在解决方案，特别针对低亮度 Z-pole 运行条件下的性能优化。重点阐述基于团簇计数法的粒子鉴别能力，并给出 pad/pixelated TPC 技术的模拟研究结果。模拟表明，相较于传统 pad 读出方案，高粒度读出 TPC（500 μm × 500 μm）在单电子空间分辨率、高探测效率、优异径迹重建性能及 PID 能力（< 3σ）方面具有显著优势。该研究对于环形对撞机研究提供了重要研究参考和技术支撑。

Speaker: Dr Huirong Qi (Institute of High Energy Physics, CAS)

14:35 半导体径迹探测体系与关键技术研发

我国在先进大型精密硅基磁谱仪系统自主研制方面缺乏系统性经验和关键技术综合能力。硅径迹探测器作为精密粒子磁谱仪的核心，其研制涵盖探测器设计、高性能传感器、先进电子学、轻质高强度支撑结构、高效冷却系统及数据采集系统。项目团队以大工程建制为组织体系，围绕硅径迹探测器关键技术，以下一代磁谱仪实验为主线，系统推进高精度半导体径迹探测器及相关关键技术研发。通过结构设计、物理机理研究、工艺优化及性能表征，研制国际首款兼具优于40 ps时间分辨和优于10 μm位置分辨的大尺寸硅基传感器，以及多材料、多种类体系的半导体传感器；同步研发首款配套高精度、低功耗、高集成度的专用读出芯片，以及国内首款面向高能物理应用的抗辐照RISC-V片上系统芯片，实现前端动态配置、片上智能算法和数据处理。结合高速数据采集系统、低物质量高强度碳纤维支撑结构及国内首台专用两相CO2低温冷却系统研发，构建传感器—电子学—读出—机械—冷却—系统的全链条协同研发体系，研制下一代半导体径迹探测器工程样机，构建我国完整半导体径迹探测技术链，提升高性能粒子探测自主创新能力，为下一代地面对撞机、空间磁谱仪及高精度辐射探测器提供核心技术支撑。

Speaker: Prof. 琪 严 (IHEP)

14:50 ATLAS实验高颗粒度时间探测器

为应对高亮度大型强子对撞机（HL-LHC）运行期间显著增加的事例堆积，ATLAS 实验正在建设高颗粒度时间探测器（High-Granularity Timing Detector，HGTD）。HGTD 将安装在 ATLAS 前向区域，通过约 30–50 ps 的精确时间测量，从而有效区分不同质子-质子碰撞顶点，提升前向喷注、轻子、光子及缺失横动量等物理对象的重建性能。HGTD 采用低增益雪崩二极管（LGAD）硅传感器和高速前端读出芯片相结合的技术路线，是 HL-LHC 升级中关键的探测系统之一。
报告将讲述 ATLAS 实验高颗粒度时间探测器项目（HGTD）的最新进展，特别是中国团队所做的主导贡献。中国团队在HGTD项目中主导了LGAD传感器研制、ASIC读出芯片的晶圆测试、模块组装、探测器单元集成以及相关电子学、DAQ和系统级测试工作。

Speaker: 梁志均

15:05 ETL LGAD characterization

During the High Luminosity phase of LHC, up to 140 - 200 proton-proton collisions per bunch crossing will bring severe challenges for event reconstruction. To mitigate pileup effects, an extended upgrade program of the CMS experiment is expected. Among these, a new timing layer, the MIP Timing Detector (MTD), will be integrated between the tracker and the calorimeters. With a time resolution of 30-60 ps, the MTD will enable 4D vertexing, bringing significant improvements in track-to-vertex association and object identification. The MTD is composed of two subsystems based on different technologies: the Barrel Timing Layer (BTL) consists of LYSO:Ce scintillating crystals readout by SiPMs, and the Endcap Timing Layer (ETL) is made of Low-Gain Avalanche Diodes.

The LGADs are an important development in silicon detector technology. They boast advantages such as excellent time resolution and signal-to-noise ratio, rendering them crucial for next-generation detectors. LGADs can be quickly evaluated for key electrical parameters—including breakdown voltage and depletion voltage—through I-V and C-V tests. These tests enable us to assess the quality of LGADs. This talk presents the characterization in the laboratory of 16x16 channels and test structures for the CMS ETL, including I-V and C-V measurement experimental setup and preliminary measured results.

Speaker: Zhan Zhang (University of Science and Technology of China)

15:20 Progress on ACTS-based 4D tracking and a design of timing pixel chip

At the future collider High-Luminosity LHC(HL-LHC), the average number of the simultaneous pp interactions per event, or pile-up (μ), will rise to as much as 200. Resolving the pile-ups using time measurement has already been investigated during LHC Phase-Il Upgrade, e.g. the ATLAS High Granularity Timing Detector (HGTD), which will be placed outside the ATLAS Phase-II Inner Tracker (ITk) endcap region. Meanwhile, the possibility of replacing the inner barrel layers of the ATLAS ITk with 4D pixel detector after Run 4 is foreseen as well. In the first part of the report, we will introduce the implementation of 4D tracking based on the common tracking software (ACTS) workflow. The performance of 4D tracking, e.g. efficiency and resolution, will also be discussed. In the second part, we will present a readout ASIC for 4D pixel detectors, featuring high time precision and a readout architecture to cope with the significant increase in data rates.

Speaker: 洪章 谢 (中国科学技术大学)

15:35 辐照环境下4H-SiC探测器和石墨烯/4H-SiC探测器稳定电荷收集和时间分辨性能

碳化硅（SiC）具有宽禁带、高原子位移阈能、高导热率、高载流子饱和漂移速度、高临界击穿电场等特性，碳化硅探测器具有抗辐照、常温或高温下稳定运行、快响应时间等优势，可以应用在高能物理、核物理、空间探测等领域。首先，我们研制出探测面2mm×2mm、时间分辨为40ps的4H-SiC PIN探测器。能量为2.896 GeV的Ta离子辐照后，该探测器的时间分辨和电荷收集效率分别为45ps和97.4%。其次，为实现探测器在低能软X射线、低能α粒子、紫外光探测等领域的应用，在传统4H-SiC探测器时间分辨为100ps的基础上，利用石墨烯降低碳化硅探测器的死区效应，研制出电荷收集均匀稳定、时间分辨为58.0ps的石墨烯/4H-SiC探测器。在能量为160 keV、剂量为1 MGy的X射线辐照下，该探测器的电荷收集效率和时间分辨分别为99.24%和64.0ps，说明辐照后探测器具有稳定的电荷收集和时间分辨性能。最后，为了增加信号增益，我们研制出碳化硅LGAD。经能量为80 MeV质子辐照后，其漏电流降低了2–4个数量级，但电荷收集效率下降至约50.3%。同时，为扩展其在高能物理实验、同步辐射光源等场景中微弱信号探测的应用，我们提出了双极结型晶体管（BJT）集成的增益型粒子探测器新结构。研究表明，碳化硅探测器具有一定的发展潜力，未来可在低穿透粒子探测、低能重离子探测、医学剂量测定、高能物理、核物理、空间探测等领域应用。

Speaker: 聪聪 王 (Institute of High Energy Physics of Chinese Academy of Sciences)

15:45 茶歇

16:15 CMS实验高颗粒度量能器升级

XXX

Speaker: Feng Wang (Institute of High Energy Physics)

16:35 高颗粒度长条晶体电磁量能器

Future electron-positron colliders such as the CEPC require electromagnetic calorimetry with excellent energy resolution and fine spatial segmentation for precision physics measurements and particle-flow reconstruction. A high-granularity long-bar crystal electromagnetic calorimeter, HGCCAL, has been proposed to meet these requirements.

This talk presents the design concept, simulation studies, prototype development, and beam-test performance of HGCCAL. The detector employs BGO/BSO crystal bars with SiPM readout, aiming at an energy resolution better than $3\%/\sqrt{E(\mathrm{GeV})} \oplus 1\%$. Geant4 simulations demonstrate good energy linearity and excellent intrinsic electromagnetic resolution. A compact prototype was constructed and tested at CERN beamlines, achieving an energy resolution of $1.95\%/\sqrt{E(\mathrm{GeV})} \oplus 0.59%$ in the 0.3-6 GeV range. These results validate the feasibility of HGCCAL and provide key input for future CEPC calorimeter optimization.

Speaker: Yang Zhang

16:55 基于机器学习的高颗粒度量能器电磁响应与能量重建研究

新一代正负电子对撞机的终极物理目标是实现对希格斯 (Higgs) 玻色子性质的
精确测量，这对强子量能器 (AHCAL) 的能量分辨率提出了极其严苛的要求。新一
代高颗粒度 AHCAL 能够记录强子簇射极其精细的三维空间分布。为验证其硬件性
能，AHCAL 样机在 CERN 共进行了三次束流测试，获取了大量 μ、e 和 π 束流数
据。
为此，本研究创新性地引入了先进的机器学习算法，旨在通过深度挖掘簇射的
物理演化规律突破这一性能瓶颈。本工作设计了高度契合高粒度数据特征的算法架
构：该架构能够逐层扫描能量沉积以高效提取复杂的横向空间拓扑特征，并精准学习
强子簇射在纵向深度上的逐层级联发展。我们将该算法不仅应用于蒙特卡洛 (MC)
模拟数据，更直接应用于真实的束流测试数据。结果显示，在模拟与真实物理测量
双重环境下，该模型均对 AHCAL 的核心仪器性能实现了巨大的提升。与传统算法
相比，机器学习模型在全能区展现出更好的线性度响应，其重建的能量分辨率也提
升了约 20%

Speaker: 想 李 (中国科学技术大学)

17:05 The CMS MTD Barrel Timing Layer for the High Luminosity LHC

The High Luminosity LHC (HL-LHC) phase, scheduled to start in 2030 and deliver 3000 fb⁻¹ in 10 years, will offer unique potential for precision measurements and searches for rare processes. However, it will also pose significant challenges for the detectors due to extremely high radiation levels and the large number of simultaneous interactions per bunch crossing (up to 200). To mitigate the adverse effects of pile-up, the CMS experiment will install a new detector, the MIP Timing Detector (MTD), designed to measure the arrival time of charged particles with a precision of 30–60 ps. The central part of the MTD, the Barrel Timing Layer (BTL), is made of about 166,000 scintillating LYSO:Ce crystal bars with double-ended SiPM readout. Following its design optimisation and successful performance validation through dedicated test beam campaigns on prototypes, the BTL is now in the construction phase and nearing completion. This contribution will give an overview of the key design features of the BTL and will present recent large-scale system tests and the progress on the BTL assembly.

Speaker: jin wang (school of physics Peking Uniersity)

17:15 Zero Degree Calorimeter (ZDC) for the BESIII Experiment

The Beijing Spectrometer III (BESIII) experiment at the Beijing Electron–Positron Collider II (BEPCII) carries out precision measurements in tau–charm physics, hadron spectroscopy, nucleon form factors, and corrections to the muon anomalous magnetic moment.
Initial State Radiation (ISR) return method provides a unique path to access lower center–of–mass energies without interrupting high–energy data taking, which will greatly support the BESIII energy-scan programs. However, the standard BESIII electromagnetic calorimeter (EMC) has low efficiency for forward ISR photons (|cos θ|>0.99), and untagged ISR analyses suffer from large backgrounds and poor precision. A dedicated Zero Degree Calorimeter (ZDC) in the very forward region will strongly enhance ISR photons detection and also provide the fast luminosity measurement for BEPCII.
This paper reports the full R&D status including detector design, simulation, readout electronics, prototyping, laboratory tests, beam-test trials, and future timeline of the BESIII ZDC project. The ZDC uses a radiation-hard LYSO+SiPM array with modular design to profile electromagnetic showers and achieve good energy and position resolution. Extensive tests have validated the design. Joint test, mass production and final commissioning are expected to be done by the end of 2026. The ZDC also serves as an R&D platform for future collider projects in China, including the Circular Electron–Positron Collider (CEPC) and the Super Tau-Charm Facility (STCF).

Speaker: 雷(Lei) 张(Zhang) (南京大学(Nanjing University))

17:25 Compact Periscopic Light Guide (PLG) Design for High-Granularity Calorimeters

High-granularity calorimeters demand highly compact detection units to achieve precise energy measurements. However, the severe geometric mismatch exists between large scintillator tiles and small Silicon Photomultipliers (SiPMs) leads to degraded light collection efficiency (LCE) and non-uniform spatial response, which fundamentally limits the calorimeter's energy resolution. The use of photonic crystal, metalens, or conventional light guide design cannot overcome this bottleneck without significantly raise the cost of the calorimeter or introducing unacceptable dead zones.
To address this critical challenge, we propose a novel compact Periscopic Light Guide (PLG) design. This innovative approach can effectively guide scintillation photons through a periscopic optical path to the coupled SiPM. The PLG has extremely small footprint, and requiring no modifications to the existing scintillators or SiPMs.
In this work, we present the design and optical simulation result acquired with Geant4 of the proposed PLG. The simulation results demonstrate a more than 2-fold increase in light collection efficiency compared to the standard direct coupling scheme, alongside a significant improvement in the spatial response uniformity across the scintillator tile. These results validate the feasibility of the periscopic design in mitigating geometric mismatch for high-granularity calorimeter. Future work will focus on prototype fabrication, experimental validation, and iterative design optimization to further mature this technology for suitable applications.

Speaker: 铭正 杨 (实验物理中心)

17:35 CEPC端盖切伦科夫探测器预研

切伦科夫探测器在对撞机实验中是实现高精度粒子鉴别的重要技术手段。我国提出的环形正负电子对撞机（CEPC）已完成探测器技术设计报告，为进一步提升端盖区域π、K、P粒子鉴别能力，突破高动量区间鉴别瓶颈，扩大立体角覆盖范围，拟在端盖区域增设专用切伦科夫探测器。本报告主要内容包括对国际上同类型切伦科夫探测器的调研，CEPC端盖切伦科夫探测器的概念设计，探测器的初步模拟，以及关键技术（切伦科夫辐射体，光子探测）的初步研究等方面的内容，希望与国内同行进行交流和合作。

Speaker: 中华 秦 (高能所)

17:45 Progress in the CMS phase-II endcap muon detector upgrade with GEM

To maintain the performance of muon triggering and reconstruction under high background at HL-LHC, the forward part of the muon spectrometer of the CMS experiment will be upgraded with Gas Electron Multipliers (GEM). A first GEM station (GE1/1), covering about 50m2, was installed during the Long Shutdown 2 (LS2, 2019–2021). Three GE2/1 chambers have additionally been installed during the pauses of the current Run-3, while the rest is postponed to after high luminosity upgrades. A third d 6-layer station (ME0), covering about 60m2, will extend the pseudo-rapidity coverage of the muon system from |n|<2.4 to |n| <2.8 and will be installed behind the new high-granularity calorimeter (HGCAL) during the third Long Shutdown (LS3, 2026–2028). This talk will provide an overview of the current progress with some focus on CMS-China group's contributions.

Speaker: Dayong Wang (Peking University)

18:10 → 19:00 晚餐

19:00 → 21:45 科普、宣传与工具

Conveners: 主持人1：高原宁 (Peking University) , 主持人2：赵强 (Institute of High Energy Physics, Chinese Academy of Sciences)

19:00 费米的大象

Speaker: 邢志忠 (IHEP, Beijing)

19:30 《现代物理知识》介绍及科普宣传

Speaker: 张闯 (Institute of High Energy Physics, Chinese Academy of Sciences)

19:55 基于数据看我国高能物理发展态势

Speaker: 江亚欧 Jiang Ya'ou (高能所)

20:15 茶歇

20:25 中枢引领、协同攻坚：粤港澳大湾区科学教育生态体系构建与实践

Speaker: 王丰

20:50 AI和软件工具

Speaker: 郭奉坤 (ITP, CAS)

21:15 讨论，自由发言

19:30 → 22:30 晨光杯评选

Convener: 主持人：曹庆宏 (Peking University)

19:30 Dispersive determination of nucleon gravitational form factors

Speaker: 雄辉 曹 (中国科学院理论物理研究所)

19:42 Measurement of reactor neutrino oscillation with the first JUNO data

Speakers: Iwan Morton-Blake, 孙明霞, 张涵, 王明远, 陈志源 (高能所)

19:54 Baryon Electric Charge Correlation as a Magnetometer of QCD

Speaker: 锦彪 顾 (华中师范大学)

20:06 Establishing CP violation in b-baryon decays

Speaker: 韩佳杰

20:18 First Indication of Solar $^8B$ Neutrinos via Coherent Elastic Neutrino-Nucleus Scattering with XENONnT

Speaker: Kexin Liu (Tsinghua University)

20:30 Strong and Weak CP Tests in Sequential Decays of Polarized Σ^0 Hyperons

Speaker: 沈宏飞

20:42 1. Determination of the spin and parity of all-charm tetraquarks Review 2. Experimental road of the J/ψϕ mass spectrum, current status, and implications

Speaker: 王晰宁

20:54 Observation of the antimatter hypernucleus $^4H$

Speaker: 俊霖 吴 (中国科学院大学 核科学与技术学院)

21:06 1. ω Meson from Lattice QCD 2. Emergence of the πð1300Þ Resonance from Lattice QCD

Speaker: 浩波 燕 (P)

21:18 Observation ofcharge-parity symmetry breaking in baryon decays

Speaker: 杨雪婷

21:30 Direct observation of the Migdal effect induced by neutron bombardment

Speaker: 涤凡 易 (U)

21:42 Precise measurement of matter-antimatter asymmetry withentangled hyperon antihyperon pairs

Speaker: 张景旭

21:54 First Indication of Solar $^8B$ Neutrinos through Coherent Elastic Neutrino-Nucleus Scattering in PandaX-4T

Speaker: 敏祯 张 (上海交通大学)

22:06 Suppression of Spin Transfer to Λ Hyperon in Dcep-Inelastic Scattering

Speaker: 晓燕 赵 (山东大学前沿交叉科学青岛研究院)

22:18 1. Extracting the femtometer structure of strange baryons using the vacuum polarization effect 2. Observation of the Electromagnetic Radiative Decays of the Λ（1520） and Λ（1690） to γΣ^0

Speaker: 郑文静

Thursday, 16 July

08:30 → 12:05 分会1：TeV物理和超出标准模型新物理

Conveners: Chair1：杨海军 (Shanghai Jiao Tong University) , Chair2：王青 (TsingHua University)

08:30 Dark Matter Searches at the LHC

This report summarizes the current experimental landscape, covering both conventional WIMP searches and the explorations of the broader Dark Sector. This will also discuss the critical role of theory benchmark model preparation — such as the 2HDM+a framework in guiding Run 3 analyses and interpreting results. This report highlights the evolving strategies to probe the dark matter on colliders.

Speaker: 子瑞 Zirui 王 Wang (复旦大学 Fudan University)

08:50 Complex $\tau$ Electric Dipole Moment from GeV-Scale New Physics

Among the charged leptons, the $\tau$ electric dipole moment ($d_\tau$) is the least constrained. We show that the Im[$d_\tau$] imposes strong constraints on new physics that have yet to be discussed. Motivated in particular by the Super Tau-Charm Facility (STCF), which will provide a uniquely clean environment for precision $\tau$-physics, we study the momentum-transfer dependence of $d_\tau(q^2)$ and compare the projected sensitivities of STCF and Belle II. Our analysis shows that an axion-like coupling of the $\tau$ lepton can induce sizable real and imaginary components of the EDM. The predicted EDM values may approach the present experimental sensitivities, making them accessible to future measurements at Belle II and the STCF.

Speaker: ZiYue Zou (TD-Lee Inst.)

09:02 Recent results of exotic physics searches at the CMS experiment

This talk reviews recent results of exotic physics searches at the CMS experiment. The selected results either applied novel analysis techniques that significantly extended previous search limits, or observed hints of excess.
Exotic physics searches include, but are not limited to, heavy fermions, heavy gauge bosons, extra dimensions, and model-independent general searches.

Speaker: Hui（徽） Wang（王） (NNU)

09:14 CMS上通过单轻子末态寻找与顶夸克耦合的Z'粒子

本报告展示了在紧凑缪子螺线管（CMS）实验上利用2016-2018年所采集到的质心能量为13TeV的质子-质子对撞数据，通过单轻子末态（一个电子或者一个缪子）寻找与一对顶夸克联合产生并且衰变为一对顶夸克的$Z'$粒子的分析过程。单轻子末态有着较高的衰变分支比，能够很好地压低量子色动力学（QCD）本底过程，并且单轻子末态的触发效率高，从而成为很多新物理寻找的重要选择。这是CMS实验合作组上第一个通过这个过程来寻找$Z'$粒子的分析，并且也是CMS实验合作组上第一个利用了整个Run2的数据来寻找这种$Z'$粒子的分析。

本课题主要关注高质量的$Z'$粒子以及其衰变产物顶夸克。高质量的$Z'$粒子更容易衰变产生boosted的顶夸克，这是一种因为夸克喷注的空间分辨率而无法区分其衰变产物的大半径夸克喷注。针对这种顶夸克我们使用了一种机器学习算法来重建，并将重建出的前两个顶夸克的不变质量定义为要寻找的$Z'$粒子的质量。本实验所使用的$Z'$粒子模型的质量范围为0.5TeV到3TeV, 质量宽度（$\Gamma/Z'_{M}$）分别为4\%, 10\%, 20\%和50\%。这些数据由位于欧洲核子研究中心（CERN）LHC上的CMS实验在对撞能量$\sqrt{s} = 13$ TeV下采集，对应的积分亮度为$138 fb^{-1}$。最终结果与标准模型的理论预期是一致的。在95\%的置信水平下，这一过程的产生截面上限介于3.21到145之间。这些结果给出了该条件下$Z'$粒子存在性的最严格限制。

Speaker: 霄楠 侯 (高能所)

09:26 SUSY Search summary with VBF Signatures in Compressed scenarios

Supersymmetry (SUSY) remains one of the most compelling extensions of the Standard Model, offering solutions to the hierarchy problem, dark matter, and gauge coupling unification. The ATLAS experiment at the LHC has conducted a broad and robust search programme for SUSY particles using proton--proton collision data collected during Run 2 at $\sqrt{s}=13$~TeV.

This talk will present a dedicated search for SUSY in models with highly compressed mass spectra, targeting events consistent with vector boson fusion production. The analysis uses $140\,\text{fb}^{-1}$ of data and selects events with at least two jets separated by a large pseudorapidity gap, large missing transverse momentum, and no reconstructed leptons. A boosted decision tree is employed to discriminate the SUSY signal from Standard Model backgrounds. No significant excess is observed, and the results are interpreted in a simplified model with wino-like $\tilde{\chi}_2^0/\tilde{\chi}_1^\pm$ and bino-like $\tilde{\chi}_1^0$. Lower limits at $95\%$ confidence level are set on the masses of the next-to-lightest SUSY partners between $117$ and $120$~GeV when the mass splitting to the lightest SUSY particle is within $1$~GeV, surpassing previous constraints from LEP experiments by approximately $25$~GeV. This analysis closes a challenging region of parameter space that is difficult to probe with conventional soft-lepton searches.
This topic is included in the current MOST project, IHEP contributed to the internal note editor and gave approval talk.

Speaker: 文翊 金 (高能所)

09:38 COMET: Search for Muon-to-Electron Conversion Experiment

COMET实验位于日本东海的J-PARC质子加速器研究中心，旨在以超高灵敏度搜寻带电轻子味破坏过程（CLFV过程），即无中微子伴随的μ-e转换（μ⁻ + N → e⁻ + N）。在标准模型中，轻子味严格守恒，此类CLFV过程被严格禁止；但在一些超出标准模型的新物理模型中（如超对称理论等），预言了其分支比将显著增强。因此，COMET实验是寻找超出标准模型的新物理最有力工具之一。COMET实验采用高强度脉冲质子束轰击静止靶产生大量π介子，π衰变产生的μ子经超导螺线管磁铁捕获并输运至铝制停止靶，形成μ子原子。COMET实验利用脉冲式束流、主动宇宙学屏蔽以及精心设计的偏转磁铁系统，可有效抑制本底事件。COMET实验采用分阶段实施的方法，分为了Phase-I和phase-II。Phase-I 预计物理灵敏度可达约 3×10⁻¹⁵，本报告将介绍COMET实验的物理动机、探测原理等，以及当前建设进展与未来计划，并展望其对轻子物理与新物理探索的重要意义

Speaker: 韦豪 郑 (Nanjing University)

09:50 Transformer-based Flavour Tagging in ATLAS

The ATLAS collaboration has released its next-generation flavour tagging algorithm, based on a transformer architecture [1]. The performance is enhanced significantly and the performance in data matches that in the simulation. Recent physics analyses have reported large improvements in sensitivity thanks to the new tagger [2]. In this talk, I will discuss how the tagger was developed and the stories behind.

[1] Nature Commun. 17 (2026) 541
[2] Phys. Lett. B 876 (2026) 140280

Speaker: Bingxuan Liu (SunYat-sen University)

10:02 茶歇

10:30 Symbolic Reduction of Multi-loop Feynman Integrals via Generating Functions

TBD

Speaker: Bo Feng (华南师范大学)

10:50 Bootstrap two-loop six-gluon QCD amplitudes

We invent a new method of bootstrapping multi-loop QCD amplitudes. Using the analytic function space of two-loop six-point Feynman integrals, an ansatz was set for the two-loop six-gluon QCD amplitudes. From the collinear and triple collinear limits, the weight-four and leading colour part of two-loop six-gluon amplitude is uniquely fixed.

Speaker: Yang Zhang (University of Science and Technology of China)

11:02 The four-loop non-singlet splitting functions in QCD

In this talk, we report the first complete results of the four-loop non-singlet splitting functions in QCD. Splitting functions govern the scale evolution of parton distribution functions, which enter the theoretical predictions for all physical processes at high-energy hadron colliders. According to their flavor group structure, splitting functions are classified into non-singlet and singlet components. In the non-singlet case, a direct multiplicative renormalization formula applies, leaving the integration-by-parts (IBP) reduction and the solution of master integrals as the primary bottleneck. After many years of effort, we obtained recently the first complete four-loop non-singlet splitting functions. The results are in fully analytic form. We also report on progress in the singlet case, where twist-two operators mix with un-physical operators. We present a systematic procedure to derive the counterterm Feynman rules for these un-physical operators, which provides a path toward the complete four-loop singlet splitting functions.

Speaker: Tongzhi Yang (South China Normal University)

11:14 Physics at a High Energy Neutrino Collider

We point out that a multi-TeV muon collider can simultaneously be a high energy neutrino collider as a result of radiations of soft electroweak gauge boson $W^\pm$. We consider the processes $\mu^+\mu^- \to \ell^+\ell^-$, $\nu\mu^\pm \to \nu \ell^\pm$ and $\nu\bar \nu \to \ell \bar\ell$ near the collider energies to probe the physics beyond the Standard Model. We adopt simplified models with new vector bosons $W'^\pm$ and $Z'$, as well as dimension-6 effective operators to capture the full weak isospin structure in the lepton sector.

Speaker: Keping Xie (Tsung-Dao Lee Institute, Shanghai Jiao Tong University)

11:26 Semi-Inclusive Deep-Inelastic Scattering at N3LO in QCD

Identified hadron production is essential for the study of nucleon structure and QCD hadronization at high energies. We present the first calculation of unpolarized semi-inclusive deep-inelastic scattering (SIDIS) at next-to-next-to-next-to-leading order (N3LO) in perturbative QCD. Our calculation is based on a novel method of two-dimensional transverse-momentum subtraction motivated by QCD factorization of soft and collinear singularities. The N3LO corrections are moderate in general but can be significant in threshold regions, and exhibit excellent perturbative convergence and reduced scale variations. The fully differential framework allows for arbitrary selection cuts and directly enables precision nucleon tomography at the upcoming Electron-Ion Collider, establishing the theory foundation needed to match the anticipated experimental accuracy. Generalization of the method to calculations of polarized SIDIS is also feasible.

Speaker: Dr 亮 董 (上海交通大学)

11:38 Techniques of Feynman integral computation and their applications

The computation of multi-loop Feynman integrals is a key problem in current quantum field theory research and is widely applied in precision computations in high-energy physics. Due to its high computational complexity, it also poses a major challenge in this field. In this talk, I will introduce the techniques for computing multi-loop Feynman integrals, including corresponding state-of-the-art software. I will introduce their recent developments, as well as their applications at the frontier high-energy physics computations.

Speaker: 子昊 吴

11:50 Computation of Three-Loop Five-Point Feynman Integrals

We calculate all three-loop, five-point, massless planar Feynman integral families in the dimensional regularization scheme. This is a new milestone in Feynman integral computations. The analysis covers four distinct families of Feynman integrals for this configuration, for all of which we derive the canonical differential equations. Our results also confirm a prediction on the three-loop five-point alphabet. The boundary values are analytically determined. Using these differential equations, the integrals can be evaluated to high precision efficiently. Our work establishes the foundation for next-to-next-to-next-to-leading-order (N^3LO) calculation of the production of three massless final states, as well as corresponding bootstrap studies in gauge theories.

Speaker: Yongqun Xu (University of Science and Technology of China)

08:30 → 12:00 分会2：强子物理与味物理

Conveners: Chair1：张艳席 (北京大学) , Chair2：吴兴刚 (Chongqing University)

08:30 Measurement of the Lambda EDM and search for CP violation at BESIII

The dominance of matter over antimatter in the universe has consistently driven the pursuit of new physics beyond the Standard Model that violates charge-parity (CP) symmetry. The BESIII experiment has collected 10 billion J/ψ events and 2.7 billion ψ(3686) events. With the quantum entangled decays of J/ψ, we can search for the new source of CP violation and precisely measure the electric dipole moment (EDM) of hyperons like Lambda from J/ψ→ΛΛbar, achieving a three-order-of-magnitude improvement over the previous upper limit. The results of search for CP violation in ψ(3686)->π+π-J/ψ and precise measurement of chromo-EDM of the charm quark, as well as the search for CP violation processes J/ψ→Ks0Ks0 and ψ(3686)→Ks0Ks0, will also be presented.

Speaker: Jinlin Fu (University of Chinese Academy of Sciences)

08:50 LHCb上双重味重子实验研究

我将报告LHCb上双重味重子实验研究近期进展，包括单电荷双粲重子的首次发现，这是利用升级后的LHCb探测器发现的首个新粒子。

Speaker: Jibo HE (UCAS)

09:05 $J/\psi$ and exotic hadron productions in high energy nuclear collisions with the parton and hadron cascade model PACIAE

In this talk, we will present our recent results on the $J/\psi$ and exotic hadron productions in high energy nuclear collisions using the parton and hadron cascade model PACIAE. For the $J/\psi$ sector, we will provide a quantitative analysis of the relative contributions for different production mechanisms and their energy and rapidity dependence in the inclusive $J/\psi$ production. We will also discusse the effect of the hadronisation on the $J/\psi$-hadron energy correlator. Finally, we will present the criteria for deciphering the nature of exotic harons such as X(2370) and X(2300).

Speaker: Wenchao Zhang (陕西师范大学)

09:20 Semi-leptonic $B$ decays to tensor mesons

Using the form factors of the transtions $B\to T$ with $T$ refering to a tensor meson, such as $a_2(1320), f_2(1270),K^*_2(1430), D_2^*(2460)$ and $D^*_{2s}(2573)$, within the covariant light-front quark model (CLFQM), we
provide a detailed investigation of the corresponding semi-leptonic decays $B\to T\ell\nu_\ell$ with $\ell=e,\nu,\tau$. All the branching ratios of these
decays are larger than $10^{-5}$, in which the maximum value can reach up to $10^{-3}$, indicating promising prospects for experimental observation. Furthermore, we also calculate the longitudinal polarization fractions $f_L$ and forward-backward asymmetries $A_{FB}$ for these considered decays. All the decays $B\to T \ell\nu_{\ell}$ are dominated by the longitudinal
polarization, where the polarization fractions can reach up to $\sim70\%$ for the decays $B\to T \ell^{\prime}\nu_{\ell^\prime}$ with $\ell^\prime=e, \mu$, those of the decays $B\to T \tau\nu_{\tau}$ are a little smaller. The $A_{FB}$ values of the decays $B\to T \ell^{\prime}\nu_{\ell^\prime}$ and $B\to T \tau\nu_{\tau}$ have opposite signs.

Speaker: Prof. 志清 张 (Henan University of Technology)

09:35 tau physics at Belle II

Tau 物理是Belle II实验上的重要研究课题之一。Belle II目前已经采集了842 pb-1数据，并正在产出越来越多的tau物理研究成果。本报告题目是 “tau physics at Belle II”, 将报告Belle II实验最新的tau物理研究进展，包括通过 tau->pi Ks nv寻找CP破坏，一系列tau衰变中寻找轻子味破坏，tau轻子寿命的测量等课题。

Speaker: Chunhua Li (Nanjing Normal University)

09:50 Measurements of strong-phase differences in neutral charm meson decays at BESIII

Recently, BESIII has collected 20 fb⁻¹ of D0D0bar data from psi(3770) decays. These naturally produced D0D0bar pairs are in a C-odd quantum-correlated state,providing a unique laboratory for measuring the strong-phase differences between D0 and D0bar decays. These strong-phase parameters are essential inputs for CP violation studies in heavy-flavour physics, particularly for determining the CKM angle gamma, extracting charm mixing parameters, and searching for indirect CP violation in the charm sector. This presentation reports recent progress on new and improved measurements of strong phase differences in $K^{0}_{S/L}hh(h=\pi,K)$, $K\pi\pi\pi$, $KK\pi\pi$ and $K\pi$ tags at BESIII, especially the first joint gamma measurement with LHCb using a novel unbinned method in $K^{0}_{S/L}hh(h=\pi,K)$ tags and the first measurement of $K\pi$ strong-phase differences using novel C-even correlated D0D0bar samples. We will also report measurements of the CP-even fractions of $\pi\pi\pi^{0}$, $KK\pi^{0}$ decays.

Speaker: 文涵 沈 (中国科学院大学)

10:05 茶歇

10:35 Recent theoretical progress in the study of Generalized Parton Distributions

Recent years have witnessed rapid development in the study of generalized parton distributions, motivated by the current and future colliders such as JLab 12 GeV, EIC, and EIcC, which are on track to provide high-precision lepton-hadron collision data. Such data, when combined with precision calculations in Quantum Chromodynamics (QCD), can reveal the intricate inner structures of the hadrons encoded in their GPDs. I will review recent progress in perturbative QCD studies that will help determine GPDs to high precision from future high-quality experimental and lattice QCD data.

Speaker: Yao Ji

10:55 Toward a Unified Understanding of Hadron Light-Cone Distribution Amplitudes from Lattice QCD

Light-cone distribution amplitudes (LCDAs) are fundamental nonperturbative objects governing hard exclusive processes and heavy-flavor decays. Over the past decades, lattice QCD studies of LCDAs have evolved from traditional calculations of low-order moments to the recent development of approaches based on large-momentum effective theory (LaMET), which enable direct access to the Bjorken-x dependence of hadron structure.

In this talk, I will review recent progress in lattice QCD determinations of LCDAs, with an emphasis on developments within the LaMET framework. I will first summarize the status of conventional moment calculations and their phenomenological implications, and then discuss the theoretical foundations of LaMET, including renormalization, perturbative matching, and the control of systematic uncertainties. I will further review recent lattice studies of light-meson, heavy-meson, and baryon LCDAs, highlighting both methodological advances and emerging physics results. Particular attention will be given to recent progress in the LaMET investigation of pseudoscalar and vector mesons, the B-meson LCDA, and exploratory studies of baryonic LCDAs. Finally, I will comment on remaining challenges and future opportunities for precision studies of hadron structure from lattice QCD.

Speaker: 俊 华 (South China Normal University)

11:10 B-meson LCDA and power corrections

Light-cone distribution amplitudes (LCDAs) frequently arise in factorization theorems involving light and heavy mesons. We will talk about the power corrections in the extraction of the B-meson LCDAs.

Speaker: Yanbing Wei (CCNU)

11:25 The hadronic decays of charmed mesons at BESIII

BESIII has collected 20.3 and 7.33 fb^-1 of e+e- collision data samples at 3.773 and 4.128-4.226 GeV. These constitute the world's largest samples of D anti-D and Ds anti-Ds pairs, respectively, providing a unique laboratory to probe the non-perturbative dynamics of Quantum Chromodynamics (QCD) in the charm sector. We will present the measurement of branching fractions of fifteen Ds+ hadronic decays using a global fit. Furthermore, we report recent advancements in amplitude analyses of D to pi pi eta, D+ to pi+ pi0pi0/etaeta, D0 to Ks pi0 pi0 as well as D(s)+ to KSKLpi+, Ds+ to pi+pi+pi-pi0 (pi0). These analyses allow for detailed investigations of intermediate processes involving scalar mesons and the polarization properties of D to vector-vector decays. We also observe deviations in the branching fractions of phi-meson decays from the Particle Data Group (PDG) world averages, as well as anomalously large branching fractions for decays dominated by W-annihilation topologies.

Speaker: jiajv wang (wuhan university)

11:40 Light meson decays at BESIII

The world’s largest sample of J/ψ events accumulated at the BESIII detector offers a unique opportunity to investigate η and η′ physics via two body J/ψ radiative or hadronic decays. In recent years the BESIII experiment has made significant progresses in η/η′ decays. A selection of recent highlights in light meson decays at BESIII are reviewed in this report, including the precision measurement of Dalitz plots, transition form factor measurements, as well as the search for rare/forbidden decays of η/η′.

Speaker: Xiaolin Kang (China University of Geosciences (Wuhan))

08:30 → 12:00 分会3：高能重离子物理

Conveners: Chair1：王群 (University of Science and Technology of China) , Chair2：杨帅 (South China Normal University)

08:30 QCD in Strong Magnetic Fields from Lattice QCD

Speaker: Hengtong Ding (Institute of Particle Physics, Central China Normal University)

08:55 相对论重离子碰撞中的手征磁效应回顾

Speaker: Shuzhe Shi (Tsinghua University)

09:20 Spin Alignment and Phase Transition of QGP in the Presences of Magnetic and Vorticity Fields

We will investigate the Spin Alignment and Phase Structure of Thermal QGP under Rotation, and the Anomalous Magnetic Moment and Phase Transition of the Magnetized
QCD Background with the finite temperature field theory; and we also study the rotation effect on the deconfinement phase transition in Holographic QCD. And then we make summary and conclusions.

Speaker: Prof. 笙琴 冯 (三峡大学理学院)

09:35 QCD matter at finite magnetic field and nonzero chemical potential in extensive and non-extensive statistics

In this talk, we will present our recent results on the QCD matter. We construct a hybrid equation of state (EoS) by smoothly interpolating the EoS in the hadron resonance gas at low temperatures to that in the ideal parton gas at high temperatures, and employ it to study the properties of the quantum chromodynamics (QCD) matter at a finite magnetic field and nonzero chemical potential. We will also discuss the nonequilibrium effect on the QCD phase transition as well as on the distributions of tranverse momentum, rapidity and elliptic flow for charged hadrons in AA collisions at the LHC energies.

Speaker: Wenchao Zhang (陕西师范大学)

09:50 Weyl anomaly induced transport in hydrodynamics

We show that the Weyl (trace) anomaly gives rise to a new non-dissipative vector current in accelerated relativistic fluids. The anomaly uniquely fixes the second-order transport coefficient governing the coupling between the electromagnetic field and the fluid acceleration. We derive this result by extending hydrodynamic anomaly matching to include the trace anomaly, and independently reproduce it in boundary quantum field theory by treating the Rindler horizon of an accelerated observer as an effective boundary. From the boundary perspective, the electric- and
magnetic-field sectors correspond to screening and vacuum magnetization effects near the boundary. In the local rest frame, the electric-field contribution induces an additional charge density, while the magnetic-field contribution generates a transverse current with a Nernst-like, more generally thermomagnetic Hall-like, tensor structure. Our results reveal a new class of anomaly-induced transport governed by the trace anomaly.

Speaker: 诗正 杨 (浙江海洋大学)

10:05 茶歇

10:35 Quantum computing/AI for nuclear physics

Speaker: 星雨 郭 (scnu)

11:00 Quantum Simulation of Hadronization in Relativistic Heavy-Ion Collisions

Hadronization, the dynamical realization of color confinement in QCD, is the central process connecting the quark-gluon plasma (QGP) produced in relativistic heavy-ion collisions to the hadronic observables measured in detectors. Yet it remains beyond the reach of existing first-principles frameworks, as semi-classical generators lose quantum coherence while lattice QCD cannot access real-time Minkowskian dynamics. Quantum computing offers a natural solution: the ability to track unitary evolution of entangled many-body states makes it ideally suited to the real-time, non-perturbative dynamics.

In this talk I present two complementary quantum simulation approaches to hadronization and related processes in heavy-ion collisions. In the light-front framework, I discuss real-time jet evolution in QGP media, including momentum broadening, gluon production, entropy growth, and color decoherence in dijet systems, alongside the preparation of hadronic bound states via variational quantum algorithms. In the equal-time lattice framework, I discuss real-time string breaking, hadronic scattering, and non-equilibrium dynamics in lower-dimensional gauge theories, where quantum information science tools such as tensor networks provide powerful and efficient classical benchmarks. Both approaches carry unique strengths, and together they build toward a first-principles quantum simulation framework for the full hadronization process, connecting real-time parton dynamics to non-perturbative hadronic structure.

Speaker: Wenyang Qian (Central China Normal University)

11:15 Real-Time Evolution of Dressed Quarks and Jet Energy Correlators

Understanding how quarks and gluons evolve and lose energy as they traverse a colored medium is central to interpreting jet observables in high-energy nuclear collisions. We investigate this using a non-perturbative light-front Hamiltonian approach, where the physical quark — dressed by its gluon cloud — is treated as the eigenstate of the vacuum QCD Hamiltonian, and its real-time quantum evolution through a SU(3) colored medium is simulated directly. This framework yields a rich set of jet observables including momentum broadening, gluon emission rates, and energy loss. We further apply it to compute jet energy correlators in pp and pA collisions, demonstrating their sensitivity to the medium saturation scale as a probe of nuclear matter.

Speaker: Meijian Li (University of Santiago de Compostela)

11:30 Data-driven measurements of the total beauty productions in pp, p-Pb and Pb-Pb collisions at the LHC

The production of beauty hadrons in proton-proton (pp), proton-lead (p-Pb), and lead-lead (Pb-Pb) collisions offers critical insights into heavy-flavor hadrons production mechanisms across different collision systems. This work presents Bayesian unfolding data-driven measurements of the open beauty hadron production, utilizing ALICE and LHCb data to recover full kinematic information from the measured non-prompt D0 and non-prompt J/ψ.

Speaker: Guangsheng Li (中国科学技术大学)

11:45 Physics-Informed Global Extraction of the Universal Small-$x$ Dipole Amplitude

We extract the universal small-$x$ dipole scattering amplitude $N(r,x_B)$ from a global analysis based on a physics-informed neural network (PINN), without imposing a priori MV-type parametrization of the initial condition. The network provides a smooth and differentiable surrogate for $N(r,x_B)$, whose rapidity dependence is constrained by the collinearly improved Balitsky--Kovchegov evolution equation, while its functional form is simultaneously constrained by Deep Inelastic Scattering (DIS) data for the reduced total and charm cross sections, exclusive $J/\psi$ photoproduction measurements, and a positivity requirement for the momentum-space dipole amplitude. The resulting single universal amplitude consistently describes all fitted observables within a unified framework, alleviating the long-standing tension between total and charm channels encountered in conventional small-$x$ fits based on rigid parametric ans\"atze. Within the fitted kinematic domain, the best extracted PINN solution yields a smooth, non-negative momentum-space dipole over the full transverse-momentum range examined. Our results provide a robust and well-behaved input for Color Glass Condensate phenomenology across a broad class of high-energy processes.

Speaker: 斯为 戴 (华中师范大学)

08:30 → 12:00 分会4：中微子物理、粒子天体物理与宇宙学

Conveners: Chair1：周也铃 (Hangzhou Institute for Advanced Study) , Chair2：陈松战 (中科院高能物理研究所)

08:30 高能水下中微子望远镜（HUNT）项目进展

位于四川稻城的高海拔宇宙线观测站（LHAASO）在银河系内发现大量拍电子伏伽马源，开启了“超高能伽马天文”观测窗口。但这些源是否为宇宙线的加速源，仍有待确认。高能天体中微子是由高能宇宙线与其他物质相互作用产生的，因其是电中性粒子，且只发生弱相互作用，是寻找高能宇宙线起源的关键信使之一。为此，我们提出在深水下建设30立方公里的阵列来探测高能中微子事例，即高能水下中微子望远镜（HUNT）项目。经过三年的技术积累和试验，我们成功在南海和贝加尔湖开展了样机投放和测试工作，实现多项关键技术突破和验证。本报告将详细介绍HUNT项目的设计、样机性能及测试进展。

Speaker: Cheng LIU (IHEP)

08:50 AI在JUNO分析中的应用

江门中微子实验（JUNO）旨在通过精确测量反应堆中微子能谱来确定中微子质量序，这要求探测器达到前所未有的 3% @ 1 MeV 的能量分辨率。为了逼近这一物理极限，并从存在 PE 堆叠和暗噪声光电倍增管（PMT）波形中提取亚纳秒级的时间与电荷信息，JUNO 合作组在其数据分析和重建链条中深度引入了人工智能（AI）与机器学习技术。

本报告将系统性地介绍 JUNO 在波形分析、重建及刻度中使用的核心 AI 方法。报告内容不仅涵盖已取得显著成果的深度学习模型（如卷积神经网络 CNN 与 Transformer），还将重点展示我们在广义机器学习领域的最新前沿探索，如基于 JAX 的可微编程与连续归一化流（cNSF）技术的应用。通过结合物理第一性原理的机器学习架构（如 RTE-cNSF），我们实现了物理过程建模与深度神经网络的深度耦合，为光子到达时间的精确推断提供了新范式。报告将探讨这些 AI 算法如何有效降低系统误差，并全面提升 JUNO 的物理发现潜力。

Speaker: 本达 续 (中国科学院大学/清华大学)

09:05 超越$Z_2$的畴壁

畴壁是从早期宇宙相变过程中离散对称性破缺过程中诞生的一类拓扑缺陷。最简单的畴壁来源于$Z_2$对称性的破缺。近年来，人们不再满足于研究这种$Z_2$对称性的破缺产生的简单畴壁，进而开始研究更复杂的离散对称性破缺产生的畴壁，包括更大的循环群$Z_n$以及非阿贝尔对称群$A_4$、$S_4$等。在这些对称性破缺产生的畴壁中，可能存在不稳定畴壁、复合畴壁、CP破坏畴壁等新的现象。

Speaker: Bowen Fu (Northeastern University, Shenyang)

09:20 Comments on "Unified neutrino mixing and approximate μ − τ reflection symmetry" (Mod. Phys. Lett. A, 40 (2025) 26, 2550097)

Resolving mass ordering is an important issue in the neutrino physics. In [Y. Hyodo and T. Kitabayashi, Mod. Phys. Lett. A40, 2550097 (2025)] the authors investigate the phenomenology of a unified neutrino mixing framework and reveal that the predicted sum of neutrino masses derived from an approximate $μ − τ$ reflection symmetric flavor neutrino mass matrix based on the unified neutrino mixing with an inverted mass ordering, is excluded from DESI2024 and Supernova Ia luminosity distance data. We note that in [Y. Hyodo and T. Kitabayashi, Mod. Phys. Lett. A40, 2550097 (2025)] an error is present in Eq.(20), i.e., the expression for $M^{μ−τ}_{23} $, a similar error also appears in Eq.(26) for $M^{μ−τ}_{13} $. That is, the condition that $M_{ee}$ and $M_{μτ}$ are real is omitted. We impose this condition and analyze its consequences. Using the newest data [O. Azzolini et al., Phys. Rev. Lett. 129, 111801 (2022); H. Acharya et al., Phys. Rev. Lett. 136, 022701 (2026)], it is obtained that the predicted sm derived from the approximate $μ−τ$ reflection symmetric neutrino mass matrices $M_{23}$ for both NO and IO are allowed. We note also that their conclusion is invalid, as it is based on outdated data.

Speaker: 文君 李 (河南师范大学)

09:35 New physics effects in Leptogenesis mechanism

Leptogenesis is a highly competitive class of theories that explains the baryon asymmetry of the universe. In this talk, I will discuss contributions of new physics effects to the Leptogenesis, including but not limited to non-restoration of the electroweak symmetry, chiral magnetic effects, and explicit breaking of the PQ symmetry.

Speaker: Wei Chao (Beijing Normal University)

09:55 茶歇

10:27 基于“悟空”号卫星的宇宙线探测与研究

暗物质粒子探测卫星“悟空”号是我国发射的第一颗用于空间高能粒子观测的卫星，其核心科学目标除了通过对电子宇宙线和伽马射线的观测来间接探测暗物质粒子，还包括通过探测宇宙线核素粒子来研究宇宙线物理。宇宙线是来自外太空的高能粒子，主要包括各种原子核和少量的正负电子、高能伽马射线和中微子等。“悟空”号具备优异的电荷分辨本领，可以对高能宇宙线核素粒子进行高精度鉴别，并对它们的能谱在宽能段内进行精确测量。“悟空”号相继在宇宙线成分能谱精确测量方面取得突破性进展，将空间直接测量拓展至PeV能区，发现了系列重要的新能谱结构，为揭示高能宇宙线的起源、加速和传播机制这一重大科学问题提供了新的依据。

Speaker: 川 岳 (Purple Mountain Observatory)

10:47 LHAASO Measurements of Galactic Ultra-High-Energy Gamma-Ray Emission: Microquasars and Diffuse Emission from the Galactic Plane

This report presents recent LHAASO measurements of Galactic gamma-ray emission, including ultra-high-energy emission from microquasars, diffuse emission from the Galactic plane, and gamma rays from nearby giant molecular clouds. The microquasar observations reveal gamma-ray spectra extending beyond 100 TeV, indicating efficient particle acceleration in accreting black-hole systems. The Galactic diffuse emission measured by LHAASO exceeds expectations based on local cosmic-ray spectra and gas column density. The LHAASO measurements imply that either additional emission sources exist or cosmic ray intensities have spatial variations. In addition, analyses of nearby giant molecular clouds provide an in-situ probe of cosmic-ray density and spectra in the interstellar medium. These results highlight LHAASO’s important role in exploring very-high-energy/ultra-high-energy processes in the Milky Way.

Speaker: 艳红 于 (Henan Normal University)

11:02 基于物理约束深度学习的高能宇宙线流强预报方法

高能宇宙线在行星际空间的太阳调制是日冕和行星际物理的核心问题，其流强预报是载人航天辐射防护的迫切需求。现有纯物理模型受限于参数不确定性与计算成本，数据驱动模型缺乏物理可解释性且跨周期外推能力不足，简化方法无法描述电荷符号依赖调制。本项目围绕多参数耦合调制机制、物理约束与外推能力、极端事件可预报性三个科学问题，构建物理-数据融合的“灰箱模型”预报框架：(1)构建覆盖22年太阳磁场周期的日尺度多源数据集，刻画多参数耦合调制特征；(2)建立包含电荷漂移的三维帕克输运模型，检验电荷符号依赖调制机制；(3)构建物理约束深度学习预报模型，提升跨周期外推能力；(4)开展跨周期回报试验与极端事件检验，形成业务化评估规范。项目将深化宇宙线调制物理的认识，填补我国高能宇宙线业务化预报空白。所建立的日尺度通量预报与福布什下降预警能力，可为空间站舱外活动及深空任务辐射防护提供定量依据。

Speaker: 劼 冯 (中山大学)

11:10 Investigating Production of TeV-scale Muons in Extensive Air Shower at 2400 Meters Underground

Deep underground experiments present a new avenue to probe the first interactions in extensive air showers or hadronic interactions in the extreme forward phase space. The China Jinping Underground Laboratory, characterized by a vertical rock overburden of 2,400 m, provides an exceptionally effective shield against cosmic muons with energies below 3 TeV. The surviving high-energy muons, produced in the first interactions of extensive air showers, open a unique observational window into primary cosmic rays from tens of TeV up to the PeV scale and beyond. This distinctive feature also enables detailed studies of charged hadron production in the earliest stages of shower development. Using 1,338.6 live days of data collected with a one-ton prototype detector for the Jinping Neutrino Experiment, we measured the underground muon flux originating from air showers. The results show discrepancies of about 40\% corresponding to significances of more than 2$\sigma$, relative to predictions from several leading hadronic interaction models. We interpret these findings from two complementary perspectives: (i) by adopting the expected cosmic-ray spectra, we constrain the modeling of the first hadronic interactions in air showers and provide novel insights into resolving the long-standing \textit{muon puzzle}; and (ii) by assuming specific hadronic interaction models, we infer the mass composition of cosmic rays, and our data favor a lighter component in the corresponding energy range. Our study demonstrates the potential of deep underground laboratories to provide new experimental insights into air shower physics and cosmic rays.

Speaker: 昕舜 张 (T)

11:18 Recent LHAASO Results on Cosmic-Ray Energy Spectra and Mass Composition

Abstract: LHAASO has achieved high-precision cosmic-ray measurements with excellent angular resolution, (10%)–(15%) energy resolution, nearly composition-independent energy reconstruction, and strong particle-identification capability. Benefiting from its large acceptance and high statistics, LHAASO has enabled a series of breakthrough results in astroparticle physics. In cosmic-ray studies, LHAASO has measured the energy spectra of individual species, especially protons and helium nuclei, with high-purity samples and a precision comparable to that of direct space-borne experiments. These measurements extend the continuous coverage of the cosmic-ray spectrum from (10,\mathrm{GeV}) to (10,\mathrm{PeV}) and reveal unexpected spectral structures, including proton hardening around (0.1,\mathrm{PeV}), a proton knee at (3.3,\mathrm{PeV}), continuous helium softening above (0.1,\mathrm{PeV}), and a weak hardening before the helium knee near (7,\mathrm{PeV}). Furthermore, LHAASO’s precise all-particle spectrum measurement, with well-controlled systematic uncertainties, reveals intrinsic spectral features and the correlation between mass composition and spectral structures. These results provide a global picture of Galactic cosmic rays over six orders of magnitude, offering important clues to their origin and acceleration mechanisms.

Speaker: 利苹 王 (IHEP)

11:33 Understanding the Origin of Cosmic-Ray Positrons

The positron flux measured by the AMS exhibits complex energy dependence. In the entire energy range the positron flux is well described by the sum of a power-law term associated with the positrons produced in the collision of cosmic rays, which dominates at low energies, and a new source term of positrons, which dominates at high energies. This new source has a finite energy cutoff, which is established with a significance of ~5σ. These experimental data on cosmic ray positrons show that, at high energies, they predominantly originate either from dark matter annihilation or from a new astrophysical source.

Speaker: Cheng ZHANG (ihep)

11:41 阿尔法磁谱仪宇宙线锂同位素最新测量结果

本报告将介绍在1.9到25 GV刚度范围内宇宙线锂-6与锂-7同位素能谱测量结果。该结果基于阿尔法磁谱仪（AMS）2011年5月至2023年10月在轨采集到的97万个锂-6与104万个锂-7同位素事例完成。测量结果表面，锂-6与锂-7同位素能谱具有几乎相同的时间演化结构，在约4 GV之上，锂-6、锂-7、氦、铍、硼、碳、氮、氧原子核具有相同的时间演化结构。在约7 GV之上，锂-6与锂-7同位素能谱具有相同的能谱形状。这揭示了二者均由更重的宇宙线原子核在传播过程中与星际间介质碰撞碎裂而产生的，排除了锂-7同位素能谱中存在显著初级组分的可能性。

Speaker: 尧 陈 (Shandong Institute of Advanced Technology (SDIAT))

11:49 基于AMS测量重核宇宙线磷、氯、氩、钾、钙能谱

本报告将介绍国际空间站上的阿尔法磁谱仪（AMS）对磷、氯、氩、钾、钙等宇宙线重核能谱的最新测量结果。AMS在GV至TV的刚度（动量/电荷）区间内对这五种元素的能谱进行了测量，这是迄今为止对上述宇宙线能量最高、精度最高的观测。通过对能谱结构的深入分析，我们发现上述5种原子核均同时包含初级和次级两种宇宙线成分。此外，我们采用独立于宇宙线传播模型的方法，计算了各原子核在天体源处的丰度比，为研究宇宙线起源提供了关键数据。最后，综合研究AMS所测得的氦至钙（电荷数Z=2-20）原子核能谱的刚度依赖性，我们发现总共存在两类初级宇宙线和两类次级宇宙线，其他所有原子核的能谱，均可由这些初级和次级宇宙线成分的线性叠加来描述。

Speaker: 兆民 王 (山东高等技术研究院)

08:30 → 12:00 分会5：粒子物理实验技术

Conveners: Chair1：刘倩 (University of Chinese Academy of Sciences) , Chair2：刘建北 (University of Science and Technology of China)

08:30 CICENNS中微子相干散射实验进展与展望

CICENNS（CsI(Na) detector for Coherent Elastic Neutrino-Nucleus Scattering）实验是由中山大学牵头、依托中国散裂中子源（CSNS）建设的中微子—原子核相干弹性散射（CEvNS）实验。CEvNS作为标准模型下低能中微子的主要相互作用过程，不仅可用于验证标准模型预言，还为研究原子核中子分布及非标准中微子相互作用等新物理提供独特途径。CICENNS实验计划建设总质量为300 kg的CsI(Na)闪烁晶体探测器阵列，利用散裂中子源产生的高通量脉冲中微子，对CEvNS过程进行高精度测量。本报告将介绍中国散裂中子源上CICENNS实验计划和最新进展。

Speaker: 振秀 黄 (中山大学)

08:45 RELICS实验：利用双相型氙时间投影室探测反应堆中微子-原子核相干弹性散射

RELICS实验（REactor neutrino LIquid xenon Coherent Scattering experiment）旨在利用双相型液氙时间投影室（LXeTPC）技术，在极低核反冲能量区间（$\mathrm{[0.3, 1]~keV_{nr}}$）探测反应堆中微子与原子核的相干弹性散射（CEvNS）信号。我们的近期目标是研发敏感体积为 $\mathrm{10~kg}$ 的液氙探测器（RELICS-10），计划部署于浙江三门核电站距堆芯约 25 m 处，预期在一年曝光量下可测得对 CEvNS 信号，显著度约为$5\sigma$。

CEvNS 成功探测依赖于液氙探测器低本底、低阈值的优势。针对该物理目标，我们基于蒙特卡洛等方法研发了降低各类本底的手段：对于该能区的主导本底延迟电子，我们研究了基于高能信号与延迟电子本底的时空关联与光电倍增管响应分布的鉴别算法，预计可将延迟电子本底降低 99% ；在环境与宇生本底方面，我们通过低本底材料筛选与聚乙烯屏蔽体设计来压低环境放射性，并研发了一套反符合效率为99%的缪子反符合系统压低宇生中子本底；在电子反冲（ER）本底方面，通过联合 S2 信号宽度和空间位置信息进行数据筛选，可降低气液界面和液氙边缘的本底约95%；

本报告将介绍 RELICS-10 实验的总体物理设计与预期探测灵敏度，对探测器在核电站的下一步建设与运行规划进行展望。

Speaker: Lingfeng Xie

09:00 Progress of CsI experiment from COHERENT

This presentation elaborates on the latest advances in the development and characterization of a 6.6 kg prototype CryoCsI detector, alongside a pulse shape discrimination (PSD) method for suppressing the dominant afterglow background. The detector achieves a high light yield of 29 PE/keVee and an energy resolution below 8% at 60 keV, accompanied by excellent long-term stability. Additionally, precision measurements of the quenching factor for pure CsI at low temperatures are presented. Our verification confirms that afterglow serves as the primary background component, and a tailored PSD method is accordingly proposed for background suppression. The effectiveness of this PSD technique is validated using historical CsI(Na) datasets, which is anticipated to substantially reduce statistical uncertainties and improve its BSM sensitivity. Finally, the sensitivity of the CryoCsI detector is systematically discussed.

Speaker: 晨光 苏 (University of Chinese Academy of Sciences)

09:15 单相液氩探测器原型机研发

太阳中微子是研究太阳核聚变过程、检验标准太阳模型以及探索中微子振荡的重要探针。液氩探测器可通过Ar-40的带电流反应探测电子味太阳中微子，尤其适用于B-8和hep等高能太阳中微子的研究。NOAr(Neutrino Observatory with Argon)实验依托中国锦屏地下实验室（CJPL）平台，面向液氩太阳中微子探测中的关键技术问题，开展掺氙单相液氩探测器原型研究，重点包括低温光读出、电场结构、信号响应和数据采集流程等方面。本报告将介绍NOAr原型机试运行阶段的初步进展，包括光探测器性能、慢控制系统、信号读出与波形分析结果，并在此基础上讨论未来不同探测器参数下对太阳中微子、超新星中微子等信号的物理预期。

Speaker: 笑宇 王 (西湖大学)

09:30 The molecular electric and magnetic property and the scintillation and quenching of liquid scintillators

Liquid scintillators are widely used in particle and nuclear physics. Understanding the scintillation and quenching mechanisms is a fundamental issue in designing a high-light-yield liquid scintillator. In this work, the basic scintillation process for two-component liquid scintillators is discussed, highlighting the processes of excitation, ionization, and anion-cation recombination. A molecule’s polar group, polarization characteristics, and the corresponding material’s dielectric constant are found to be correlated with a liquid scintillator’s scintillation efficiency. Polar groups and high relative dielectric constant (permittivity) can cause quenching and should be avoided. The tellurium loading scheme in the liquid scintillator of the SNO+ experiment, TeBD, is discussed. The hydroxyl groups introduce polar structures in the TeBD, and for the first time, the relative dielectric constant of TeBD is measured to be 16 ± 1. These discussions explain part of the quenching of the TeBD liquid scintillator. A new magnetic dipole-dipole interaction is also proposed as a scintillation quenching mechanism. The interaction rate follows as the electric dipole-dipole interaction in Foster resonance energy transfer theory. The proposed mechanism causes a long-range resonance energy transfer, and the resonance condition is that the spins of donor and acceptor electrons both flip, and the energy level differences are the same. When oxygen or organic molecules including heavy elements are dissolved in a liquid scintillator, these requirements are easier to satisfy. The proposal in the paper adds a new approach for scintillation quenching in liquid scintillators.

Speaker: Zhe Wang (Tsinghua University)

09:40 基于新型切伦科夫探测器的慢液闪方向重建

切伦科夫探测器由于其良好的角度分辨能力，被广泛用于中微子的方向探测，特别在太阳中微子、地球中微子的探测中具有非常重要的意义，但光产额相对较低，对低$MeV$能区能量分辨能力不足。液闪材料光产额高，在探测中微子信号方面通常具有较高的能量分辨，但发光均匀，无法探测信号方向。新型的切伦科夫探测器则能够结合二者优点，使用慢液闪材料，在$ns$尺度具有分离切伦科夫光和闪烁光的能力。基于此我们开发了波形分析算法，从探测器接收波形中解析出每个真实光子信号的到达时间。我们也开发了基于慢液闪材料的重建算法，能够同时获得方向和能量的良好分辨。目前该方案已在锦屏$1t$原型机上做了测试，我们通过使用$AmBe$源信号，根据级联衰变特征筛选出单能$\gamma$信号，使用重建算法重建$\gamma$信号的方向，能够显示出方向特征。我们也在锦屏百吨探测器的实验条件下模拟了算法的方向重建能力，$5MeV$的电子信号能达到$\sim 30^\circ$的角度分辨。

Speaker: 灵 刘 (TSinghua University)

09:50 基于SNO+原型研究六维中微子探测器和无中微子双贝塔衰变

本研究针对无中微子双贝塔衰变探测中的本底抑制难题，提出一项创新技术方案。当前以SNO+为代表的液闪探测器虽能量分辨率优异，但缺乏粒子方向信息，难以有效区分信号与太阳中微子及γ本底。基于SNO+原型，提出通过系统性升级光电读出系统，利用快液闪中契伦科夫光（方向性、瞬时）与闪烁光（各向同性、延迟）的时间特性差异，采用高精度PMT与高速电子学在时间域分离两种光子，通过契伦科夫光重建粒子方向，结合两者信息重建时间、顶点和能量。构建国际首个兼具高能量分辨与方向灵敏度的六维（三维空间、时间、能量、方向）全信息中微子快液闪探测器，为无中微子双贝塔衰变研究提供全新本底鉴别手段。

Speaker: Yang Zhang (Shandong University)

10:00 茶歇

10:30 Deep underground atmospheric neutrino and cosmic ray detector at CJPL

Dark matter, neutrinos, and high-energy cosmic rays are frontier areas of particle physics and astrophysics, closely related to cosmic and stellar evolution. The China Jinping Underground Laboratory (CJPL) features the deepest rock overburden in the world, which can significantly suppress low-energy cosmic-ray muons, providing a unique environment for detecting atmospheric neutrinos and high-energy cosmic-ray muons. Based on the high purity water shield at CJPL, this project plans to develop an underground detector for cosmic rays and neutrinos. The successful development of this instrument will not only improve the sensitivity of dark matter experiments at CJPL, but also provide unique, high-statistics underground muon data for studies of primary cosmic rays and mountain tomography.

Speaker: Prof. Ning Zhou (Shanghai Jiao Tong University)

10:45 SuperEM: Next-Generation Sub-meV Heterojunction Cryogenic Neutrino Detectors

Direct observation of the Cosmic Neutrino Background (CνB) and precise measurements of absolute neutrino mass require advanced detection technologies that can overcome existing hardware bottlenecks. Current cryogenic detectors struggle to simultaneously achieve sub-meV energy thresholds, high energy resolution, and nanosecond response times within a highly scalable architecture. To address this challenge, we propose the Superconductor-Coupled Semiconductor Electron-Multiplying (SuperEM) detector, a novel sensing framework based on an S-I-P-N heterojunction.
The SuperEM architecture utilizes the minimal Cooper-pair breaking gap of superconducting materials (e.g., ~0.35 meV for aluminum) to bypass the traditional semiconductor bandgap barrier, effectively lowering the initial excitation energy to the sub-meV regime. Following micro-energy deposition, non-equilibrium quasiparticles are injected into a semiconductor depletion region via Fowler-Nordheim field emission across a nano-scale insulator layer. By operating the semiconductor P-N junction at a deep-cryogenic temperature of 10 mK, lattice phonon scattering is highly suppressed, enabling low-fluctuation avalanche multiplication.
This topology physically decouples micro-energy sensing from in-situ charge amplification. Theoretical and initial experimental frameworks indicate that SuperEM can achieve an intrinsic energy resolution approaching 40 meV at 1 eV for pre-filtered experiments, alongside nanosecond pile-up mitigation for full-energy absorption measurements. Beyond neutrino physics, the SuperEM detector provides a versatile, highly scalable hardware foundation for light dark matter (LDM) searches, cosmic terahertz surveys, and in-situ radiation monitoring for superconducting quantum computers.

Speaker: 希磊 孙 (IHEP)

11:00 HUBS（宇宙热重子探寻计划）最新进展及低温读出技术

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Speaker: jian wang (Department of Physics and Center for Astrophysics, Tsinghua University,Beijing 100084,China)

11:20 基于硅光电倍增管的液氩掺杂氙粒子探测器搭建与分析

液态惰性气体粒子探测器凭借其低本底、低能量阈值等优势，在暗物质搜寻、中微子探测等稀有物理事件研究中具有重要应用价值。硅光电倍增管(SiPM)因其高单光子分辨率、低工作电压等优点，正逐渐成为传统光电倍增管(PMT)之外，该类探测器的另一重要光读出器件。在液氩中掺杂少量氙，可以将闪烁光从氩发光的波长(128nm)转化至氙发光的波长(178nm)，从而提高SiPM对闪烁光的响应，提高光产额，同时相比纯液氙方案显著降低成本。

本海报主要介绍基于SiPM的液氩掺杂氙的粒子探测器的搭建与性能分析。首先，介绍了时间投影室(TPC)的核心结构设计，以及气体循环纯化与制冷系统的构建方案。完成探测器搭建，气体注入及标定源注入后，通过扫描电场与数据采集，分析得到SiPM在该工作条件下的的增益、单光子探测效率等关键参数。进一步地，给出了不同浓度的氙掺杂下增益与能量阈值等探测器标定结果，为未来更大规模液态惰性气体探测器的研制提供了参考依据。

Speaker: 一飞 赵

11:30 SCEP-宇宙线磁单极子探测器实验进展

磁单极子是高能物理前沿的重要假想粒子，其探测对验证基础理论具有关键意义。针对现有探测技术受限于成本或磁特征识别能力的不足，SCEP实验组设计了独特的基于量子传感读出的磁学探测模块，并与传统粒子探测器构建符合探测系统。该系统旨在突破现有探测技术瓶颈，并为深空磁单极子搜寻提供支撑。SCEP实验的核心物理目标包括磁单极子与轴子等宇生奇异粒子。本报告将重点介绍面向不同速度磁单极子的磁探测模块、粒子符合模块及后端电子学与读出算法等方面的研究进展

Speaker: Beige Liu (中国科学技术大学)

11:40 AMS实验RICH探测器的在轨标定和物理重建

环形成像切伦科夫探测器（RICH）是AMS实验实现高精度速度测量和宇宙线同位素分辨的关键子探测器。通过同时结合磁谱仪给出的刚度信息与RICH测量的粒子速度，可以在GeV/n能区实现对轻核同位素的质量重建，为研究宇宙线产生、传播以及核碎裂过程提供重要实验输入。本报告围绕AMS实验RICH探测器的在轨标定与物理重建方法展开介绍。首先，报告将讨论RICH探测器在同位素重建中的作用，重点说明速度分辨率、切伦科夫角测量精度以及辐射体性质对质量分辨能力的影响。其次，介绍RICH在长期空间运行条件下的在轨位置校准方法，包括探测器几何对准、光子击中信号修正以及与AMS其他子探测器轨迹信息的联合约束。随后，报告将介绍气凝胶和NaF辐射体折射系数的在轨标定方法，分析折射率微小变化对切伦科夫角和速度重建的系统影响。在重建算法方面，将重点介绍环形成像切伦科夫光路追踪方法，包括粒子穿越辐射体后的光子发射、传播、反射、探测器响应以及切伦科夫环拟合过程。最后，报告将总结RICH物理重建链条在速度、电荷和同位素质量重建中的应用，并讨论其在宇宙线同位素谱精确测量中的关键意义。本报告旨在展示AMS RICH探测器在轨标定与重建方法的整体框架，为后续高精度宇宙线同位素分析提供基础。

Speaker: Hai Chen (Zhejiang University)

11:50 阿尔法磁谱仪对宇宙线反氘的搜寻

宇宙线反氘核是暗物质湮灭或衰变等新物理过程的灵敏探针之一，其在低能区的天体物理二次产生本底预期极低 。阿尔法磁谱仪 (AMS) 是目前唯一长期运行于国际空间站的大型粒子物理磁谱仪，自2011年运行至今，已累积超过2600亿个宇宙线事例，能够通过永磁体偏转结合多子探测器系统精确鉴别粒子的电荷符号、动量、速度与质量，从而对反物质粒子具有独特的鉴别能力 。本报告将介绍AMS在反氘搜寻方面的最新分析进展，重点讨论探测器性能、粒子鉴别策略以及系统性研究等方面的工作。

Speaker: 森泉 卢

12:05 → 14:00 午餐

14:00 → 18:10 分会1：TeV物理和超出标准模型新物理

Conveners: Chair1：阮曼奇 (IHEP) , Chair2：张华桥 (IHEP)

14:00 Muon g−2 and EDM: Precision Probes of TeV-Scale New Physics

The muon anomalous magnetic moment, aμ = (g−2)/2, and the muon electric dipole moment are precision observables with exceptional sensitivity to physics beyond the Standard Model. The successive Muon g−2 experiments at CERN, Brookhaven, and Fermilab were recognized with the 2026 Breakthrough Prize in Fundamental Physics, highlighting the long-standing impact of this program on precision tests of fundamental interactions. The final result from the Fermilab Muon g−2 Experiment has reached a precision of 127 parts per billion, providing the most precise measurement of the muon magnetic anomaly to date. At the same time, important questions remain concerning the Standard Model prediction, in particular the hadronic contributions, as well as the need for independent experimental cross-checks. Complementary to g−2, the muon electric dipole moment provides a highly sensitive probe of new sources of CP violation and charged-lepton-sector new physics. This talk will review the final Muon g−2 result and its implications for TeV-scale new physics, highlight the complementary physics reach of muon EDM searches, and discuss future prospects for next-generation precision muon measurements, including g−2 concepts such as CANTON-μ.

Speaker: Liang Li (Shanghai Jiao Tong University)

14:20 Astrophysical Probes to New Physics Beyond Standard Model

TBD

Speaker: Yue Zhao (HKUST)

14:40 Novel Light Dark Matter Detection with Quantum Parity Detector Using Qubit Arrays

We present the design and the sensitivity reach of the Qubit-based Light Dark Matter detection experiment. We propose the novel two-chip design to reduce signal dissipation, with quantum parity measurement to enhance single-phonon detection sensitivity. We demonstrate the performance of the detector with full phonon and quasiparticle simulations. The experiment is projected to detect $> 30$ meV energy deposition with nearly $100\%$ efficiency and high energy resolution. The sensitivity to $m_\chi> 0.01$ MeV dark matter scattering cross section is expected to be advanced by orders of magnitude for both light and heavy mediators, and similar improvements will be achieved for axion and dark photon absorption in the $0.04$--$0.2$ eV mass range.

Speaker: Ningqiang Song (Institute of Theoretical Physics, Chinese Academy of Sciences)

14:52 Probing neutrino-light-quark effective scalar interactions from neutrino masses

In this work, we use neutrino masses as a probe of the neutrino-light-quark effective scalar interactions. It is found that neutrinos can acquire masses not only from the usual light quark loop corrections but also from the light quark condensates. The latter contribution has been overlooked in the literature. We show that both contributions are comparable for operators involving $u$ and $d$ quarks, while quark loop corrections dominate for operators involving the $s$ quark. Using the low-energy effective field theory extended with light right-handed neutrinos and matching to chiral perturbation theory, we systematically analyze these contributions, deriving constraints on the corresponding Wilson coefficients from neutrino mass bounds, coherent elastic neutrino-nucleus scattering, and light pseudoscalar meson invisible decays. Our analysis shows that electron neutrino
mass measurements provide the most stringent constraints on these scalar couplings, significantly improving upon limits from other observables. The results highlight the importance of including both perturbative and nonperturbative contributions in complete phenomenological analyses of neutrino mass generation mechanisms.

Speaker: Mr 丰之 陈 (暨南大学)

15:04 Search for ultralight scalar dark matter with quadratic interactions

In this talk, I will discuss about my recent work on the searches for the ultralight scalar dark matter with quadratic interactions with SM fields. This will lead to the effective interactions between the ultralight dark matter and the nucleon fielIn this talk, I will discuss about my recent work on the searches for the ultralight scalar dark matter with quadratic interactions with SM fields. This will lead to the effective interactions between the ultralight dark matter and the nucleon fields phi^2 N N/f below the QCD confinement scale, which can be thought as potential barrier for the dark matter wind in the presence of ordinary matter. When the potential barrier is large enough compared with the kinetic energy of the dark matter, the dark matter flux will bounce back from the ordinary object, as a result inducing a pressure force on the object. After taking into the constraints from Supernova cooling, BBN and gravitational inverse square law test, there exists parameter spaces in our model which can be searched for by utilizing this force effect on the experiment for the test of the weak equivalence principle.ds phi^2 N N/f below the QCD confinement scale, which can be thought as potential barrier for the dark matter wind in the presence of ordinary matter. When the potential barrier is large enough compared with the kinetic energy of the dark matter, the dark matter flux will bounce back from the ordinary object, as a result inducing a pressure force on the object. After taking into the constraints from Supernova cooling, BBN and gravitational inverse square law test, there exists parameter spaces in our model which can be searched for by utilizing this force effect on the experiment for the test of the weak equivalence principle.

Speaker: Prof. Da Liu (山东大学)

15:16 电弱相变引力波的探测

本次报告中我会介绍下电弱相变引力波基于空间引力波探测器太极等的探测预期研究，及相应的唯象学研究方面的影响，如基于太极对希格斯耦合探测的预期等。

Speaker: Huaike Guo (UCAS (ICTP-AP))

15:28 Light and Heavy Scalar Resonances in the GNMSSM with Correct Dark Matter Relic Abundance

Recent CMS analyses report an excess in the diphoton-plus-$b \bar{b}$ channel, indicative of a heavy resonance around 650 GeV decaying into a Standard Model (SM)-like Higgs boson and a lighter scalar near 95 GeV. The case for a 95 GeV state is further supported by diphoton excesses observed by both CMS and ATLAS, as well as a $b\bar{b}$ excess previously observed at the Large Electron-Position collider. This study presents a unified interpretation of these anomalies within the framework of the General Next-to-Minimal Supersymmetric Standard Model that naturally accommodates a light singlet-dominated $CP$-even scalar boson $h_s$ near 95 GeV and a heavier doublet-like scalar boson $A_H$ near 650 GeV.
Through a comprehensive scan of the parameter space, we demonstrate that the model can explain these excesses at $2\,\sigma$ level while satisfying constraints from the dark matter relic density, direct detection experiments, the properties of the 125 GeV Higgs boson, $B$-physics observables, and searches for electroweakinos at the Large Hadron Collider (LHC).
The interpretation features a Bino-dominated lightest neutralino as the dark matter candidate, whose relic abundance is achieved primarily via $A_s$ funnel annihilation or coannihilation with $\tilde{S}$-like $\tilde{\chi}^0_2$s into $h_sA_H$ final states. Our findings provide clear predictions for testing this scenario at the high-luminosity LHC and future colliders.

Speaker: Dr 经伟 连 (河南科技学院)

15:40 Search for dark sector at BESIII

The BESIII experiment is a symmetric e+e- collider operating at c.m. energy from 2.0 to 4.95 GeV. With the world’s largest threshold production data set of J/ψ (10 billion), ψ(3686) (2.6 billion), and 20 fb^-1 D meson pairs from ψ((3770) decay, we are able to search for various dark sectors produced in e+e- annihilation and meson decay processes. In this talk, we report the search for J/ψ→Φ+invisible, search for Ks0 invisible decay, search for the massless dark photon with charm FCNC process D0→ωγ’ and D0→γγ’, search for the dark scalar mediator with η to π^0 transition, search for the dark baryon decay in Ξ-→π-+invisible, search for the massless particle in Ξ0→Λ+invisible, and search for X(17) with ψ(3686)→X(17)χc0 and ψ(3686)→γχc0->γX(17)J/ψ.

Speaker: Jin Zhang (Sun Yat-Sen (Zhongshan) University)

15:52 茶歇

16:20 Cross-section measurements for boosted H->tautau with ATLAS experiment

The talk with present the cross section measurements of the Higgs bosons decaying to a pair of hadronically decaying tau leptons in the high Lorentz-boosted regime. The analysis is based on the full Run 2 dataset of proton-proton collisions at a center-of-mass energy of √s=13 TeV and a partial Run 3 dataset at √s=13.6 TeV collected in the 2022-2024 period by the ATLAS experiment. The analysis extends the sensitivity of previous measurements to Higgs boson transverse momentum above 300 GeV by reconstructing tau lepton pairs produced with a small separation in large radius jets. The standard tau reconstruction has limited efficiency in this phase space, requiring dedicated boosted di-tau reconstruction and identification techniques, combined with multivariate analysis methods, to extract the signal. For Higgs boson transverse momentum above 300 GeV, results are reported for an inclusive and differential measurements and within the Simplified Template Cross-Section framework. For the inclusive measurement, the analysis yields an observed (expected) significance of 3.8 (3.3) sigma over the background-only hypothesis, hence providing signal evidence in the probed analysis phase space.

Speaker: Antonio De Maria (Nanjing University)

16:40 Search for light pseudoscalar bosons, pair-produced in Higgs boson decays in the four-electron final state in proton-proton collisions at \sqrt{s} = 13 TeV

A search for pairs of light neutral pseudoscalar bosons ($A$) resulting from the decay of a Higgs boson is performed. The search is conducted using LHC proton-proton collision data at $\sqrt{s}=13~\mathrm{TeV}$, collected with the CMS detector in 2016--2018 and corresponding to an integrated luminosity of $138~\mathrm{fb}^{-1}$. The $A$ boson decays into a highly collimated electron-positron pair. A novel multivariate algorithm using tracks and calorimeter information is developed to identify these distinctive signatures, and events are selected with two such merged electron-positron pairs. No significant excess above the standard model background predictions is observed. Upper limits on the branching fraction for $H\to AA\to 4e$ are set at 95% confidence level, for masses between $10$ and $100~\mathrm{MeV}$ and proper decay lengths below $100~\mu\mathrm{m}$, reaching branching fraction sensitivities as low as $10^{-5}$. This is the first search for Higgs boson decays to four electrons via light pseudoscalars at the LHC. It significantly improves the experimental sensitivity to axion-like particles with masses below $100~\mathrm{MeV}$.

Speaker: Yipin Wang (Peking University)

16:52 Search for the Higgs boson decay to a $Z$ boson and a photon in $pp$ collisions at $\sqrt{s}=13~\mathrm{TeV}$ and $13.6~\mathrm{TeV}$ with the ATLAS detector

A search for the Higgs boson decay to a $Z$ boson and a photon in the $\ell\ell\gamma$ ($\ell = e, \mu$) final state is performed using $pp$ collisions at $\sqrt{s}=13.6~\mathrm{TeV}$ recorded with the ATLAS detector at the Large Hadron Collider during 2022--2024, corresponding to an integrated luminosity of $165~\mathrm{fb}^{-1}$. The signal yield, normalised to the Standard Model prediction, is measured to be $\mu = 0.9^{+0.7}_{-0.6}$, compared to an expected value of $\mu = 1.0 \pm 0.7$. This corresponds to an observed (expected) signal significance of $1.4$ ($1.5$) standard deviations for the background-only hypothesis. This result is combined with that of a similar search performed with $140~\mathrm{fb}^{-1}$ of $\sqrt{s}=13~\mathrm{TeV}$ $pp$ collisions to provide the most stringent expected sensitivity to date to this rare decay, namely an observed (expected) signal strength of $\mu = 1.3^{+0.6}_{-0.5}$ ($\mu = 1.0^{+0.6}_{-0.5}$), corresponding to an observed (expected) significance of $2.5$ ($1.9$) standard deviations. The measurement is consistent with the Standard Model expectation.

Speaker: 晨风 段 (Institute of High Energy Physics, CAS)

17:04 Higgs boson property measurements and new resonance searches in the diphoton channel at CMS

The talk will present the recent results of Higgs boson property measurements and new resonance searches in the diphoton channel at CMS. The talk will cover the published results of the relevant analyses IHEP dominated and contributed in past 2 years, including the Higgs boson mass and cross section, low-mass and very low-mass diphoton resonances, and the resonant HH/HY with H decaying into two photons.

Speaker: Junquan (军全) TAO (陶) (IHEP/CAS (中科院高能所))

17:16 Approximate N$^2$LO and N$^3$LO QCD Predictions for $tW$ Production

We present high-precision predictions for associated $tW$ production at the LHC that incorporate the next-to-next-to-leading order hard and soft functions as well as the complete next-to-next-to-next-to-leading order scale-dependent terms derived from the corresponding anomalous dimensions. These higher-order corrections, which dominate the full perturbative results, increase the next-to-leading order cross section by more than 10%. Based on the comparison with ATLAS and CMS measurements, we directly extract the Cabibbo-Kobayashi-Maskawa matrix element $|V_{tb}|=0.99\pm 0.03({\rm exp.})\pm 0.03({\rm theo.})$ without assuming unitarity, achieving a precision comparable with the current world average value.

Speaker: 家乐 丁 (山东大学)

17:28 Resummed azimuthal decorrelation and transverse momentum imbalance of dijets at the LHC

We present a theoretical study of the azimuthal decorrelation $\delta\phi$ and transverse momentum imbalance $q_T$ in dijet production at the LHC, offering intriguing insights into the dynamics of quantum chromodynamics. We define the jet axes using the recoil-free winner-take-all (WTA) recombination scheme. For the azimuthal decorrelation $\delta\phi$, this axis choice eliminates non-global logarithms (NGLs) entirely. For the transverse momentum imbalance $q_T$, NGLs emerge specifically in the small jet radius limit ($R \ll 1$). In this regime, the WTA scheme simplifies the theoretical framework by restricting jet radius logarithms to the soft sector. We derive factorization formulae for both observables within soft-collinear effective theory. To address the small-$R$ NGLs in the $q_T$ distribution, we refactorize the soft function into global soft, collinear-soft, and ultra-collinear-soft modes. We perform the resummation of global large logarithms $\ln(\delta\phi)$ and $\ln(q_T/Q)$ up to next-to-next-to-leading logarithmic accuracy. For the $q_T$ distribution, this is combined with a leading-logarithmic resummation of the non-global $\ln R$ terms. We match our predictions to leading fixed-order $\mathcal{O}(\alpha_s^3)$ calculations. We also numerically investigate the structure of the first subleading power corrections. Comparisons with \texttt{PYTHIA}~8 simulations demonstrate that the observables we consider are robust against non-perturbative multi-parton interactions and hadronization effects.

Speaker: Rong-Jun Fu (Fudan University)

17:40 The charged Lepton Flavor Violation with trilinear R-parity Violating SUSY

The $\mu$-$e$ conversion process is one of the most powerful ways to test lepton-flavor-violating (LFV) interactions involving charged leptons. The standard model with massive neutrinos predicts an extremely low rate for $\mu$-$e$ conversion, making this process an excellent probe for testing LFV arising from new physics. Among many theoretical models that can induce LFV, the Supersymmetric model with R-parity violating interactions is one of the most studied for $\mu$-$e$ conversion. In this work, we revisit trilinear $R$-parity violating interactions for $\mu$-$e$ conversion, considering renormalization group (RG) running effects from high to low energy scales. The $\mu$-$e$ conversion, $\mu \to e \gamma$, and $\mu \to eee$ experimental data are compared to give upper limits on the relevant 15 combinations of the trilinear $\lambda^{\prime}$ couplings and 6 combinations of the $\lambda$ couplings, certain of which are underexplored in previous studies. We find that RG running effects influence the limits by no more than 30\% in most cases, but can improve constraints by $\sim$80\% in certain combinations, which cannot be neglected. In the near future, COMET and Mu2e are expected to begin data-taking and aim to provide the most stringent constraints on $\mu$-$e$ conversion. These next-generation $\mu$-$e$ experiments have the ability to give much more comprehensive examinations on most trilinear coupling combinations than the $\mu\to e\gamma$ and $\mu\to 3e$ decay experiments. The $\mu$-$e$ experiments will not only deepen our understanding of LFV but also provide a crucial way to examine the underlying new physics contributions.

Speaker: 雨奇 肖 (Central China Normal University)

17:52 Deep-learning boosted hadronic Higgs precise measurements at future e+e− Higgs factories

Precise measurements of Higgs decays into quarks and gluons are essential
for probing the Yukawa couplings of the Higgs boson and testing the flavor structure of the Standard Model. We investigate the process e+e− → ZH at √s = 240 GeV at a future e+e− Higgs factory, taking the CEPC design as a benchmark. Jet flavor is identified using state-of-the-art particle-level deep neural network taggers, whose per-jet outputs are combined with global event observables in a two-stage analysis to separate the Higgs hadronic decay modes from the backgrounds. Assuming an integrated luminosity of 20 ab−1, we present a quantitative sensitivity estimation corresponding to a statistical significance of about 1.3σ for H → s¯s. These results highlight the potential of deep-learning-based jet flavor tagging for precision studies of Higgs decays at future e+e− Higgs factories.

Speaker: 逸凡 朱 (上海交通大学)

14:00 → 18:10 分会2：强子物理与味物理

Conveners: Chair1：戴凌云 (Hunan University) , Chair2：陈伟 (Sun Yat-Sen University)

14:00 Proposal for searching nucleon momentum distribution at electron-positron collider

Short-range correlation pairs (SRCs)---core of nuclear structure, composed of highly off-shell nucleons---are mostly studied via electron-nucleon scattering, leaving a gap in meson-based probes. We propose probing SRC off-shell nucleons via quasielastic $\pi^+$-bound proton scattering ($\pi^+ p \to \pi^+ p$) at electron-positron colliders, of which the beryllium-based ($^{9}$Be) beam pipe of the BESIII experiment operating at BEPCII, addresses a key gap and enables meson-beam investigations of SRCs. We point out that off-shellness of SRC nucleons yields measurable signatures: accumulated missing energy ($\sim0.1$\,GeV), shifted proton effective mass (0.7-0.8\,GeV), and cross-section differences from free scattering or with only Fermi motion. As an estimate, we find that BESIII's high luminosity and $\pi^+$ yield support $\sim10^4$ scattering events, while STCF ($50\times$ higher luminosity) will greatly enhance this number. This first meson-beam SRC study at an electron-positron collider fills $^{9}$Be research gaps and advances understanding of nuclear structure core and nonperturbative QCD.

Speaker: 吉 徐 (中国科学院大学物理科学学院)

14:20 三体强子分子态及三体力的研究

在本报告中，针对具有C宇称的三体强子系统，我们预言了一个良好的三体强子分子态候选者。该态不与传统的两体强子分子态及QCD裸态混合，我们进一步介绍了其质量、衰变性质和产生过程，并探讨了其在未来实验中是否可被观测到。此外，我们发现在该系统中存在一种与C宇称相关的相互作用，表现为三体力。通过系统分析该系统的质量与均方根半径，以及哈密顿量平均值，我们确认了一个研究三体力的理想体系。

Speaker: 明珠 刘 (Lanzhou University)

14:35 Hyperon spectroscopy and decays at BESIII

Based on the large data samples of 10 billion J/ψ and 2.7 billion ψ(3686) events collected with the BESIII detector, recent progress in hyperon spectroscopy, including the observations of Ξ(1720) and Σ(2330), will be presented. In addition, new radiative decay modes of Λ(1520) and Λ(1670) will be reported. Prospects for hyperon spectroscopy and decay studies at BESIII will also be discussed.

Speaker: Wenjing Zheng (IHEP(高能所))

14:50 自旋单态粒子产生和衰变研究

低质量粲偶素自旋单态eta_c和h_c粒子是研究粲偶素衰变动力学、检验强相互作用相关模型的重要实验平台。利用BESIII实验采集的27亿psi3686和100亿J/psi事例，本报告将介绍近期关于自旋单态粒子产生和衰变研究的进展，包括首次测量eta_c -> gamma gamma衰变的绝对分支比、对Jpsi-> gamma eta_c电磁跃迁衰变分支比的精度测量，首次观测到若干eta_c衰变模式，以及发现h_c的辐射衰变gamma f_2(1270)等。这些结果为理解非微扰QCD效应提供了新的实验信息。

Speaker: tengjiao zhu (Xinyang Normal University)

15:05 J/ψ Production and Fragmentation Inside Jets in Proton-Proton Collisions

Heavy-quarkonium production in jets provides a powerful probe of the interplay between heavy-quark production, parton showering, fragmentation, and hadronization in QCD. Compared with inclusive $J/\psi$ measurements, $J/\psi$-in-jet observables retain information on the surrounding jet structure and are therefore sensitive to how the quarkonium momentum is shared with other final-state particles. The fragmentation variable $z = p_{\mathrm{T}}^{J/\psi}/p_{\mathrm{T}}^{\mathrm{jet}}$ is particularly useful for testing quarkonium production mechanisms and for validating Monte Carlo descriptions of heavy-flavor dynamics in hadronic collisions.
In this work, we will present a PYTHIA 8 study of prompt and non-prompt $J/\psi$ production inside jets in proton-proton collisions, focusing on the $z$ distribution and jet constituent multiplicity. We will compare the simulations with available CMS and ALICE measurements and discuss the roles of multiple parton interactions and color reconnection in shaping the observed $J/\psi$-in-jet fragmentation behavior.

Speaker: 秋茹 白 (华中师范大学)

15:20 Tetraquark search at ATLAS

In this talk, we review the recent result from ATLAS on the all-charm tetraquark search. It covers both the di-J/psi and J/psi+psi(4S) final states. Fitted resonance parameters from different fit models are compared. The ratio of branching fractions of X(6900) decaying into these two states is also provided. These results shed light on the nature of the all-charm tetraquarks.

Speaker: Xin Chen (Tsinghua University)

15:35 The single asymmetry $A^{\sin\phi_\Lambda}_{UUT}$ at semi-inclusive DIS within collinear framework

We investigate the transverse-spin asymmetry $A^{\sin\phi_\Lambda}_{UUT}$ for transversely polarized $\Lambda$ hyperon production in semi-inclusive deep inelastic scattering with an unpolarized lepton beam and an unpolarized nucleon target. In the collinear twist-3 framework, this observable is sensitive to the naive time-reversal-odd quark-gluon-quark fragmentation function $\tilde{D}_{T}$, which describes the correlation between an unpolarized fragmenting quark and the transverse polarization of the produced hadron.

The twist-3 fragmentation function $\tilde{D}_{T}$ is calculated using a spectator diquark model, with model parameters constrained by the leading-twist fragmentation functions $D_1$ and $G_1$. Combining the model result with the unpolarized parton distribution function $f_1$, we estimate the asymmetry in the kinematical regions relevant to EIC and EicC. The results show that the asymmetry can be sizable and is strongly affected by the strange-quark fragmentation contribution.

Speaker: Dr 永亮 杨 (青岛大学)

15:50 茶歇

16:20 Glueball-like particle X(2370) at BESIII

Using the world’s largest samples of J/ψ and ψ(3686) events produced in e+e- annihilation, BESIII is uniquely positioned to investigate light hadrons in radiative and hadronic charmonium decays. This includes detailed studies of exotic hadron candidates such as multiquark states, hybrid mesons and glueballs. Recent highlights on the light exotics searches, including the glueball-like particle X(2370) and exotics state π1(1600) will be presented.

Speaker: Yanping Huang (高能所)

16:40 Charmed baryon decays at BESIII

BESIII has accumulated 4.5 fb^-1 of e+e- collision data within the 4.6 and 4.7 GeV energy range, which provide the largest dataset of Lambda_c- Lambda_c pairs in the world. We will present a novel way for exploring CP violation using the Lambda_c- Lambda_c threshold data and the first observation of the transverse polarization of Lambda_c+ in the reaction e+e--> Lambda_c+ Lambda_cbar-. Furthermore, Our presentation will also include the observation of a rare beta decay of the charmed baryon Lambda_c+ -> n e+ nu with a Graph Neural Network, recent results of the partial wave analysis of Lambda_c+, as well as the branching fraction measurements of the inclusive decays Lambda_c+->X e+ nu and Lambda_cbar- -> nbar X.

Speaker: Yangu Li (University of Chinese Academy of Sciences)

16:55 BESIII上矢量粲偶素和类粲偶素研究

BESIII实验在质心能量位于3.7 GeV到4.95 GeV之间的近50个能量点采集了积分亮度约50 fb-1的精细扫描数据，对多个遍举反应过程的产生截面进行了精确测量，包括开粲末态、隐粲末态以及轻强子末态。通过对反应截面线型的研究，在重子末态中发现psi3770显著的信号；在高质量能区也发现多个反应过程的截面在4.5 GeV、4.6 GeV和4.75 GeV附近有增长。该报告将总结近期BESIII实验在矢量粲偶素和类粲偶素研究方面的最新进展，这些精确的测量将为理解矢量粒子的性质提供重要实验输入。

Speaker: Wenyu Sun (高能所)

17:10 Fragmentation functions for production of P-wave Bc mesons

In this talk, I will present our recent progress on the fragmentation functions for the production of P-wave $B_c$ mesons within the nonrelativistic QCD (NRQCD) factorization framework. We have derived, for the first time, the gluon fragmentation functions into P-wave $B_c$ states, including both color-singlet and color-octet contributions. Ultraviolet divergences arising in the phase-space integrals are treated using a subtraction method together with operator renormalization in the $\overline{\rm MS}$ scheme. Numerical results for the fragmentation functions, fragmentation probabilities, and average momentum fractions will be discussed, along with compact analytic parameterizations that can be directly applied to precision phenomenological studies at current and future high-energy colliders.

Speaker: Dr 绪昌 郑 (重庆大学)

17:25 Study of the Pc and Pcs states

In the present work, we investigate the molecular properties of the hidden charm pentaquark states Pc and Pcs with a coupled channel framework that combines heavy quark spin symmetry and the local hidden gauge formalism. By solving the Bethe-Salpeter equation with the cutoff method, we obtain the pole trajectories, wave functions, and root-mean-square radii. For the hidden charm system, the full coupled channel interactions respecting the heavy quark spin symmetry are essential to generate the Pc states, which significantly affect the poles’ widths. In contrast, for the hidden charm strange system, the full heavy quark spin symmetry treatment is not necessary, where the splitting PB and VB sectors yield similar results.

Speaker: 楮文 肖 (广西师范大学)

17:40 基于时序微扰理论的手征介子-重子与重子-重子相互作用研究

从协变手征拉氏量出发，利用时序微扰理论（TOPT），我们对介子-重子散射和重子-重子散射进行了系统性的研究。其中，有效势定义为时序图中两粒子不可约贡献之和，通过在TOPT框架内自洽推导积分方程，并利用减除重整化方案求解得到可重整的散射振幅。首先，我们计算πN、KN单道散射到次领头阶，并推广至奇异数S=-1耦合道的介子-重子散射。通过求解耦合道积分方程，获得了Λ(1405)的双极点结构，其极点位置与BaSc格点QCD模拟结果自洽。其次，在重子-重子散射方面，通过时序微扰展开，我们实现了NN相互作用的微扰可重整性，并在所有分波中给出了唯一解。进一步将研究拓展至ΛN散射，并对其重整化问题进行了讨论。通过在单圈水平上计算双π交换的贡献，建立了次次领头阶的NN相互作用。

Speaker: 修磊 任 (山东大学)

17:55 Measurement of $\Xi^-/\overline{\Xi}^{+}$ production in jets from Z boson decays with the DELPHI open data

Since 2024, the $e^+e^-$ data at center-of-mass energy from $Z$-pole to $209\mathrm{\,GeV}$ collected by the DELPHI detector at the Large Electron-Positron collider (LEP) has been fully released to the world physics community. As one of the largest $e^+e^-$ data at the high energy frontier, the DELPHI open data makes it possible to extract new physics insights and gain practical experience for future collider experiments, by re-analyzing the data with modern theoretical and computational techniques.

This presentation reports the preliminary result of the $\Xi^{-}/\overline{\Xi}^+$ production rates and momentum spectra measurement in quark/gluon enriched jets, using $\sim 3.3$ million $Z\to \text{hadrons}$ events in the DELPHI open data collected from 1992 to 1995. The results are compared with that of other strange hadrons, such as $K^{\pm}$, $K_S^{0}$ and $\Lambda$. The comparison between the data and simulation from the generator is also presented. This study is the first measurement of the $\Xi^{-}/\overline{\Xi}^+$ production in jets and provides a foundation for future reanalyses of the DELPHI data.

Speaker: Yuzhi Che (IHEP)

14:00 → 18:00 分会3：高能重离子物理

Conveners: Chair1：罗晓峰 (Central China Normal University) , Chair2：刘峰 (Central China Normal University)

14:00 Spin polarization and spin hydrodynamics

Speaker: Shi Pu (University of Science and Technology of China)

14:25 Hyperon polarization in isobaric Zr+Zr collisions at $\sqrt{s_{NN}}=200$~GeV: TRENTo3D+ CLVisc with longitudinal flow gradient

We present a theoretical study of global and azimuthal-angle-dependent $\Lambda$ hyperon polarization in isobaric $^{96}_{40}$Zr+$^{96}_{40}$Zr collisions at $\sqrt{s_{NN}}=200$ GeV using the TRENTo-3D initial condition model coupled to (3+1)-D viscous hydrodynamic model CLVisc. A longitudinal flow velocity gradient, controlled by $f_v$, is introduced into \trento\ for the first time, providing an essential source of initial vorticity in this symmetric isobaric system. Within the isothermal polarization framework, the model achieves the first satisfactory description of STAR measurements of the global polarization $-P^{y}$ (centrality, $p_T$, and $\eta$ dependences) and the azimuthal modulation coefficients $P_{y,\mathrm{c0}}$ and $P_{y,\mathrm{c2}}$. The $p_T$ dependence reveals a non-monotonic structure from the competition between thermal vorticity and shear contributions, with $P_{y,\mathrm{c2}}$ dominantly shear-driven and proposed as a clean probe of shear-induced polarization. Scans of $f_v$, $k_T$, nuclear structure, and bulk viscosity demonstrate complementary constraints on the initial state; the five isobar parametrizations yield nearly indistinguishable polarization. For $P_z$, the isothermal scenario captures the azimuthal modulation but overpredicts its $p_T$ dependence, and the comparison with the standard thermal treatment reveals that neither scenario achieves a unified description.

Speaker: Prof. Ze-Fang Jiang (Hubei Engineering University)

14:40 Improved formula for spin polarization at local thermodynamic equilibrium

We present an upgraded formula for Wigner function and spin polarization of fermions emitted by a relativistic fluid at local thermodynamic equilibrium at the freeze-out which improves the one obtained in literatures and used in numerical simulations of relativistic nuclear collisions. By using a new expansion method applicable to freeze-out hypersurfaces with arbitrary geometry, we reproduce the known term proportional to thermal vorticity and obtain a better approximation for the spin-shear term. The new method captures the long-distance interference along the particle’s trajectory, which was missed in previous approaches. It also naturally excludes contributions from space-time gradients in the normal direction of the hypersurface, providing a theoretical justification for the isothermal condition previously imposed a priori. This framework can be extended to particles with arbitrary spin.

Speaker: Dr Xin-Li Sheng (Firenze University and INFN Firenze)

14:55 Spin Entanglement in QCD：from Non‑Equilibrium Scattering and Topological Fluctuations

Entanglement generated in the early stage of relativistic heavy-ion collisions (HIC) is considered a direct and fundamental source for understanding fast thermalization, entropy production, and evolution. Spin entanglement in QCD, arising from non-commutative geometric effects of quantum fields, provides a new avenue to explore the quantum informational footprint of the QCD topological vacuum structure and reveal potential origin of thermal entropy in chromodynamics. This work studies spin entanglement among quarks originating from two main sources: instanton(sphaleron)-induced effects, and gluon–quark scattering. Innovatively, we provide a method to extract spin entanglement in scattering processes respectively for light and heavy quark sector that corresponds to the two sources. We systematically calculate the entanglement in both cases and present results including concurrence and entropy as functions of the instanton parameter, physical mass, and momentum scale—aspects not explicitly discussed in previous studies. This directly reveals how the non-equilibrium nature of the system and field topology effects modulate spin entanglement, and clarifies the corresponding quantitative relationship between entanglement measures and core physical information related to flavor and scale. More importantly, this quantitatively explains the well-know sphaleron effect on QGP formation in early stage and its fast thermalization from spin d.o.f.
We further interpret the entanglement time scale, providing a quantitative comparison with the scrambling time, and clarify the quantum informational relations in the early-stage thermalization. Finally, we discuss some recent experimental interests and results in high-energy collisions.

Speaker: Guowei 国维 Yan 严 (Sun Yatsen University)

15:10 The spin polarization of Lambda hyperon from nucleon-nucleon scattering in low-energy collision

The spin polarization of Lambda hyperon in low-energy Au-Au collision can be generated from the nonlocal nucleon-nucleon scattering. The Lagrangian of baryon-meson interaction is obtained from the chiral perturbation theory, and we introduce a wave packet for the incoming nucleons to describe the nonlocal collision. We evaluate the spin dependent cross section with the approximations that the width of the wave packet is small and the collision energy is close to the threshold of Lambda production. The Lambda polarization emerges in peripheral collision as a consequence of spin-orbit coupling. Our result gives a spin polarization of several percent, which is consistent with the experiment data of Au-Au collision at 3 GeV from STAR collaboration.

Speaker: 轶亮 尹 (中国科学技术大学)

15:25 Transverse spin correlation and Anisotropic EEC

The spin correlation of back-to-back dihadrons emerges in unpolarized high-energy collisions, empowering unpolarized experiments to shed light on spin-dependent fragmentation functions. Transverse spin correlations of partonic $q\bar{q}$ pair manifest through dihadrons, providing a novel probe for the chiral-odd fragmentation function $H_{1T}(z)$. However, although produced gluon also exhibit linear polarization correlations, this effect cannot be observed with $\Lambda-\bar{\Lambda}$ pairs. To overcome this limitation, we propose a novel method to probe gluon linear polarization via energy correlations in hard scattering processes. Performing an all-order CCFM analysis, we utilize the characteristic $\cos 2\phi$ azimuthal modulation of jet energy-energy correlators (EECs) initiated by polarized gluons to extract their linear polarization. Our predictions can be tested at current and future facilities, including the LHC, RHIC, HERA, and the EIC. References: [1]. Lei Yang, Yu-Kun Song, Shu-Yi Wei, Phys.Rev.D 111 (2025) 5, 054035; [2]. Yu-Kun Song, Shu-Yi Wei, Lei Yang, Jian Zhou, Phys.Rev.Lett. 136 (2026) 13, 131901.

Speaker: 磊 杨 (Shandong University)

15:40 茶歇

16:10 高能核物理中的流体力学模型和QCD相结构的探索

Speaker: Li Yan (复旦大学)

16:35 核子自旋结构的实验研究进展

Speaker: Jinlong Zhang (Shandong University)

17:00 Nonlinear response of flow harmonics in Gubser flow with participant-reaction planes mismatch

We investigate the nonlinear response of flow harmonics v2, v4 to initial-state eccentricities ϵ2, ϵ4 within the Gubser-flow framework. By extending the perturbative solutions of Gubser flow, we derive analytic nonlinear response relations connecting the eccentricities ϵ2, ϵ4 to the flow harmonics v2, v4. Our results reproduce the well-known result v4/v2^2 → 1/2 in large transverse momentum pT limit. Furthermore, we study the effects of a mismatch between the participant and reaction planes. We find that the conventional nonlinear response coefficients acquire an additional factor determined by the participant-plane angles, which is often approximated as statistical noise driven by eventby-event fluctuations.This factor can modify both the strength but even the sign of the effective
nonlinear response coefficient, making it sensitive to the initial configuration of the colliding nuclei. Our study provides new analytical insight into the origin of collective phenomena in relativistic heavy-ion collisions

Speaker: 翔 任 (University of Science and Technology of China)

17:15 Direct Photon Yield and Thermal Dielectron Flow in Isobar Collisions at STAR

Thermal dileptons, produced throughout the entire evolution of relativistic heavy-ion collisions, are unique penetrating probes of the hot and dense medium as they escape without being subject to strong interactions. By measuring the transverse momentum distribution of direct virtual photons and elliptic flow ($v_2$) of dileptons emitted from the hot QCD medium, one can extract key properties of the Quark-Gluon Plasma (QGP), such as its temperature and collective expansion, while gaining insights into the mechanisms of thermal radiation.

In this talk, we will present the first measurement of thermal dielectron elliptic flow in isobar collisions (Ru+Ru and Zr+Zr) at $\sqrt{s_{\text{NN}}}$ = 200 GeV, by STAR. Additionally, we extract the direct photon invariant yield via internal conversion method. The presented results will cover direct photon invariant yields and thermal dielectron $v_2$ as a function of mass in different $p_T$ regions. Furthermore, the physics implications of direct virtual photon yield and thermal dielectron $v_2$ will be discussed.

Speaker: 贤文 包 (山东大学)

17:30 Probing cluster structure in ultracentral heavy-ion collisions

The initial-state geometry in relativistic heavy-ion collisions provides a novel probe to nuclear cluster structure. For 20Ne, a novel approach is proposed to distinguish between the cluster configurations (5α versus α+16O) in order to gain insight into nuclear structure transitions governed by many-body quantum correlations. Through analytical calculations with the microscopic Brink model and event-by-event simulations using the hydrodynamic framework, we establish the normalized symmetric cumulant NSC(3, 2) and the Pearson coefficient ρ2(v2^{2} , δ[pT]) as quantitative discriminators to reveal enhanced cluster degrees of freedom in the ground state of 20Ne. The ultracentral Ne+Ne collisions at the LHC can experimentally identify these two competing configurations via these flow correlation observables, opening a new paradigm for probing clustering in light nuclei.

Speaker: 沛 李 (Fudan University)

17:45 Radial Flow Fluctuations of Identified Hadrons in Heavy-Ion Collisions at RHIC-STAR

Beam energy dependence provides a unique probe of the evolution of collective dynamics and the transport properties of the quark–gluon plasma (QGP). A newly proposed observable, the transverse momentum–differential fluctuations of radial flow $v_{0}(p_{T})$, is measured for the first time at RHIC across a broad range of collision energies, covering the top RHIC energy and the Beam Energy Scan (BES) program. This measurement systematically constrains how radial flow fluctuations develop with changing energy density and lifetime of the medium, complementing high-energy LHC results.
In this work, we present measurements of $v_{0}(p_{T})$ for a variety of identified hadrons, $\pi^{\pm}$, $K^{\pm}$, $K^0_{S}$, $p$, $\bar{p}$, $\phi$, $\Lambda$, $\bar{\Lambda}$, and $\Xi^{\pm}$, in Au+Au collisions at $\sqrt{s_{NN}}=$ 11.5-200 GeV with the STAR experiment at RHIC. To explore how collective expansion evolves across these energies, we investigate the mass ordering of $v_{0}(p_{T})$ and test the number-of-constituent-quark (NCQ) scaling as a probe of partonic collectivity. The beam-energy dependence of $v_{0}(p_{T})$ is then studied to track the development of radial flow fluctuations from the top RHIC energy down through the BES region, offering new insights into the QCD phase structure.

Speaker: 国平 王 (华中师范大学)

14:00 → 18:00 分会4：中微子物理、粒子天体物理与宇宙学

Conveners: Chair1：马小东 (SCNU) , Chair2：向昕 (上海交大)

14:00 西藏羊八井ASγ实验超高能伽马辐射观测及其相关天体物理前沿问题

高能伽马射线观测研究是理解剧烈、瞬变天体活动，诸如宇宙线加速器、银河系超新星、双中子星并合、AGN 等天体现象多信使天文观测研究不可缺少的部分，已成为当今世界上最活跃的非电磁波探测和研究手段。2019年，我国西藏羊八井ASγ实验利用其创新型地下缪子水切伦科夫探测阵列，国际首次发现来自蟹状星云方向能量高于100 TeV（100万亿电子伏特）伽马辐射，最高光子能量达 450 TeV(450万亿电子伏特)，宣告对极端宇宙的探索首次迈入 100 TeV 以上观测能区。近年ASγ实验取得了多个重大成果，本报告主要介绍ASγ实验观测现状及其相关天体物理前沿问题。

Speaker: Jing Huang (Institute of High Energy Physics, Chinese Academy of Sciences)

14:15 LHAASO关于脉冲星风云的研究进展

脉冲星风云（PWN）是银河系内高能粒子的重要加速源，也是研究相对论激波、磁场耗散、粒子输运和宇宙线粒子起源的关键天体系统。近年来，LHAASO凭借在TeV至PeV能区的高灵敏度和大视场巡天能力，显著推进了PWN的超高能伽马射线研究。以Crab Nebula为基准，LHAASO直接探测到PeV伽马射线辐射，证明年轻PWN能够将电子加速到PeV能量；随后，PSR J1849−0001供能的Aquila Booster显示，远低于Crab自转能损失率的脉冲星也可驱动PeV级伽马射线源，并对传统的PWN粒子加速模型提出挑战。与此同时，LHAASO对CTA 1、PSR J1740+1000等的研究，揭示了PWN在不同年龄、环境和几何结构下的多样化表现，包括PWN与超新星遗迹成分的空间分辨、未知超高能源的PWN起源判别，以及弓激波尾部可能产生超高能伽马射线的新型加速场景。这些成果表明，LHAASO已将PWN研究从传统TeV波段推进到PeV时代，使PWN成为理解银河系极端粒子加速、传播的核心实验室。

Speaker: 凯 汪 (南京大学)

14:30 Unique Properties of Light Nuclei Time Variation up to 60 GV Measured by the Alpha Magnetic Spectrometer

We present for the first time the high statistics precision measurement of time structures of Li, Be, B, C, N, and O nuclei in cosmic rays in an entire solar cycle, from May 2011 to Nov 2025 between 2 and 60 GV. The fluxes and their ratios have been determined for 147 Bartels rotations. The fluxes are anti-correlated with solar activity, and the amplitude of the time structures decreases with rigidity, and all nuclei exhibit similar time variations. The Li, Be, and B fluxes exhibit a significant difference in solar modulation with respect to the C, N, and O fluxes. This observation provides new information on the propagation of cosmic rays in the heliosphere.

Speaker: 廉坤 邹 (山东高等技术研究院)

14:38 AMS所测14.5年电子与正电子时变流强的独特性质

带电宇宙线进入日球层后因太阳调制而发生流强的改变，太阳活动则导致宇宙线流强随时间而变化。精确测量不同种类、不同能量的宇宙线粒子随时间的变化是认识宇宙线日球层传播过程的重要实验手段。阿尔法磁谱仪（AMS）是安装在国际空间站上的大型磁谱仪实验，能够同时测量物质和反物质。本报告将介绍AMS宇宙线自2011年至2025年14.5年间电子、正电子每日流强测量的最新结果，并讨论这些结果所展现的太阳调制与电荷符号、宇宙线本地星际能谱（LIS）等因素的相关性。

Speaker: 彤 苏 (Shandong Institute of Advanced Technology)

14:46 Anisotropy of Cosmic ray Particles with the Alpha Magnetic Spectrometer on the ISS

Analysis of anisotropy of galactic positrons, electrons, protons and light nuclei has been performed with the Alpha Magnetic Spectrometer on the International Space Station using data from 2011 till 2025. Anisotropy measurement allows to differentiate between point-like and diffuse sources of cosmic rays for the understanding of the origin of high energy positrons or the hardening in the proton flux. The AMS results of the dipole anisotropy of cosmic ray particles are presented along with the discussion of the implications of these measurements.

Speaker: Vladimir Mikhailov (SDIAT)

14:54 Properties of Cosmic Beryllium Isotopes Measured by the Alpha Magnetic Spectrometer

Beryllium nuclei in cosmic rays are expected to be secondaries produced by the fragmentation of primary cosmic rays during their propagation in the Galaxy, and their fluxes contain essential information on cosmic-ray propagation and sources. Owing to the radioactive decay of $^{10}$Be to $^{10}$B with a half-life comparable to the cosmic-ray residence time in the Galaxy, $^{10}$Be/$^{9}$Be ratio provides unique sensitivity to the size of the Milky Way cosmic-ray propagation volume,a key parameter underlying the interpretation of secondary cosmic-ray fluxes. Prior to this study, measurements of the $^{10}$Be/$^{9}$Be ratio were restricted to kinetic energies below 2 GeV/n and were affected by large uncertainties, while the individual fluxes of $^{7}$Be, $^{9}$Be and $^{10}$Be were measured only below 0.4 GeV/n. We present measurements of the $^{7}$Be, $^{9}$Be and $^{10}$Be fluxes and their ratios over the energy range from 0.6 GeV/n to 18 GeV/n, where improved experimental precision contributes to a more accurate determination of the propagation volume.

Speaker: Zetong Sun (高能所)

15:02 GRAND项目最新进展和未来展望

分会邀请报告，介绍GRAND项目的最新进展。

Speaker: 毅 张 (purple mountain observatory)

15:17 茶歇

15:47 空间引力波数据处理新进展

引力波的发现赋予了人类研究宇宙的“听觉”。我将报告我们组近期在空间引力波数据处理方面的新进展，包括采用卡曼滤波来处理数据间断[arXiv:2507.02458]，使用机器学习[PRD 111 (2025) 103025]、量子计算[PRD 112 (2025) 083004]和基于龙算法的量子计算[arXiv:2603.17698]对引力波数据处理进行加速，以及提高机器学习特征的可解读性[Machine Learning: Sci. Technol. 6 (2025) 035045]等。

Speaker: Jibo HE (UCAS)

16:02 Probing the Dark Universe via Cosmic Antinuclei and MeV Gamma Rays with A Novel Tracking-Calorimeter

The search for the particle nature of dark matter has entered a new era of multi-messenger astrophysics. We are developing a novel tracking-calorimeter to explore two promising indirect detection channels: low-energy cosmic antinuclei and MeV gamma rays. We innovatively hybridize the detection technique using exotic atomic formation/decay and multi-layer Compton imaging into one detector system, and then are able to precisely measure the cosmic antinuclei in the unexplored low-energy range and MeV gamma with a sensitivity one order of magnitude beyond the current best.

This presentation will discuss the potentials of low-energy antinuclei and MeV gamma for new physics search, and then report the development of the novel tracking-calorimeter including a pathfinder and the first compact payload for the microsatellite mission.

Speaker: Mengjiao Xiao (上海交通大学)

16:10 Observation of Universal Spectral Softening in Primary Cosmic Rays with DAMPE

The DArk Matter Particle Explorer (DAMPE), which is a space-based high energy particle detector, has been operated in orbit for ten years. Thanks to its large geometric factor, good charge resolution and wide dynamic range in energy measurement, DAMPE can provide valuable insights on the energy spectra of cosmic-ray up to hundreds of TeV. Using nine years of on-orbit data, the DAMPE collaboration has recently reported direct measurements of the carbon, oxygen, and iron spectra over rigidity ranges from ∼20 GV to ∼100 TV (∼60 TV for iron). Distinct spectral softening features have been identified in these spectra for the first time. When combined with updated proton and helium spectra, the charge-dependent softening is found to occur universally at a rigidity of approximately 15 TV. A hypothesis in which the softening depends on nuclear mass is disfavored at a significance level of 4.4σ.

Speaker: 逸丰 魏 (University of Science and Technology of China)

16:18 Polarized X-ray signals from ALP conversion in neutron stars

Neutron stars (NS's) with their strong magnetic fields and hot dense cores could be powerful probes of axions, a classic benchmark of feebly-coupled new particles, through abundant production of axions with the axion-nucleon coupling and subsequent conversion into X-rays due to the axion-photon coupling. In this article, we point out that the pulsation structures in both the intensity and polarization of X-rays from NS's could provide us additional information about axions and their couplings. We develop new analytical formalisms of pulsation-polarization structure applicable to a wide range of NS's in the axion scenario and argue that they hold in complicated astrophysical environments. As a case study, we apply our formalism to a representative X-ray Dim Isolated Neutron Star, RX J1856.6-3754, with an unexpected hard X-ray excess which might be axion-induced. We show with an updated fit that the axion explanation is compatible with both the intensity and pulsation data available, and combining the pulsation data does not shift the posterior by more than 1 sigma. Yet, the preferred parameter space is close to being excluded by other astrophysical constraints. With a 75\% reduction of the uncertainties in the pulsation data, we could potentially draw a definite conclusion on the axion-induced X-rays at more than 3 sigma level.

Speaker: Lingfeng Li (Brown University)

16:26 AMS宇宙线反质子与基本电荷粒子的时间变化

利用AMS宇宙线数据，我们测量了1～42GV宇宙线反质子随时间的变化情况。和其它几种宇宙线基本电荷粒子（质子、正电子、电子）相比，反质子随时间变化规律有着显著的不同。AMS实验的四种宇宙线基本电荷粒子的同步测量，为研究宇宙线在太阳系中的传播规律，及其与粒子质量、电荷符号和能谱形状的关系提供了独特的视角。

Speaker: 志成 唐 (高能所)

16:34 Enhanced Cosmic-Ray Cooling in AGN from Dark Matter Deep Inelastic Scattering

The diffusion of high-energy cosmic rays (CRs) through the dark matter (DM) spikes of active galactic nuclei entails significant energy loss via interactions with DM. While previous studies of sub-GeV DM have focused on elastic scattering, this process becomes insufficient at higher proton energies and DM masses. In this work, we investigate the CR-DM deep inelastic scattering (DIS) as mediated by a vector portal. We calculate the DIS contribution to the CR energy loss rate and derive stringent exclusion limits on the CR-DM scattering cross-section for DM masses between $10^{-6}$ GeV and $1$ GeV. For higher CR energies and mediator masses, the resulting CR cooling timescales are reduced by orders of magnitude after involving the DIS contribution, producing stringent constraints that surpass most of current experimental limits.

Speaker: 致廷 卢 (南京师范大学)

16:42 Gravitational Waves from Graviton Bremsstrahlung in Scalar Leptoquark Decays

Scalar leptoquarks are scalar bosons that couple simultaneously to a quark and a lepton. They commonly appear in the Higgs sectors of grand unified theories. Stringent experimental limits on proton decay imply that these particles are superheavy. Graviton bremsstrahlung from the decays of such superheavy leptoquarks, arising from quantum gravitational processes, offers a promising source of a potentially detectable stochastic gravitational wave background. We compute the evolution of the number density of scalar leptoquarks in the early universe and assess the detection prospects for their gravitational wave signals at future observatories.

Speaker: 钊焕 余 (Sun Yat-sen University)

16:50 CDEX实验研究进展与展望

CDEX合作组使用高纯锗半导体探测器在位于四川西昌的中国锦屏地下实验室（CJPL）开展暗物质探测和无中微子双贝塔衰变实验研究。本报告将简要总结CDEX-1和CDEX-10两个实验阶段的物理成果，并重点介绍目前正在建设的CDEX-50暗物质实验和CDEX-300v无中微子双贝塔衰变实验，以及面向未来大型高纯锗阵列实验的一系列关键技术预研。

Speaker: 丽桃 杨 (Tsinghua University)

17:10 Lastest progress on the PandaX-4T and PandaX-20 experiment

PandaX experiment is located at the China Jinping Underground Laboratory and utilizes a series of dual-phase xenon time projection chambers for dark matter direct detection and neutrino studies. Recently, the PandaX-4T experiment, equipped with a 4-ton liquid xenon target, has completed its data-taking phase. With about 700~days duration, multiple physical analyses are ongoing. To achieve better sensitivity to rare signals, the first phase of next-generation experiment, PandaX-20T, is being developed with more powerful subsystems and stricter background control. In this talk, I will present an overview of the PandaX-4T and the latest progress on upgrade to the PandaX-20T experiment.

Speaker: 祥仪 崔 (上海交通大学)

17:30 New physics opportunities with DarkSHINE initiative

This talk will present the latest phenomenological and simulated experimental prospective studies on the new physics opportunities at DarkSHINE Experiment by exploring the physics sensitivity of searching for dark fermions/sterile neutrinos and utilizing the positron beam mode to search for Dark Photon invisible decay signals in comparison with electron beam mode sensitivities.

Speaker: Shu Li (TDLI, SJTU)

17:38 XENONnT 实验近期物理成果——WIMP、CEνNS 与轻暗物质搜寻

XENONnT 是位于意大利 LNGS 地下实验室的液氙双相时间投影室暗物质直接探测实验。本报告综述其近期物理成果。

在标准 WIMP 搜寻中，XENONnT 基于前两轮科学运行的盲分析对自旋无关与自旋相关 WIMP-核子弹性散射截面给出了更新的上限，覆盖 GeV/$c^2$ 至 TeV/$c^2$ 质量区间。在低能核反冲分析中，借助 $^{88}$YBe 光中子源对探测器低能响应的专门刻度，XENONnT 把灵敏度推进至太阳 $^8$B 中微子相干弹性散射 (CE$\nu$NS) 的能量窗口，并完成了对该过程的测量，给出与既有太阳中微子实验一致的 $^8$B 通量。基于同一数据，报告还将介绍在低动量传递下对弱混合角 $\sin^2\theta_W$ 的测量，对新中间矢量介子 $Z'$ 耦合及中微子电荷半径等超出标准模型情形的约束，以及在 CE$\nu$NS 已成为主导本底的能区开展的轻 WIMP 搜寻，由此定量展示``中微子雾''对直接探测灵敏度提升的物理限制。在此基础上，报告将进一步介绍仅电离信号通道 (S2-only) 的分析结果：该通道不要求 S1--S2 信号配对，从而把分析阈值推至传统 S1+S2 分析无法到达的低能区；基于此 XENONnT 给出了覆盖 sub-GeV 质量区间的暗物质-核子散射、暗物质-电子散射、轴子样粒子吸收以及暗光子等轻暗物质模型的新约束，并进一步扩展了液氙 TPC 在低能区所能触及的物理范围。

Speaker: Chang Cai (Tsinghua University)

14:00 → 18:00 分会5：粒子物理实验技术

Conveners: Chair1：胡坤 (山东大学) , Chair2：李科 (IHEP)

14:00 氘氘中子源上Migdal效应的直接观测

Migdal效应近年来因其对亚GeV暗物质探测器灵敏度提升的重大贡献而引起了广泛关注。本报告将介绍MARVEL团队设计的气体微像素探测器在D-D源上直接观测米格达尔效应。我们将介绍探测器结构及性能测试结果、D-D束流实验的详细过程，以及数据分析和相关成果。我们将讨论探测器升级工作的进展情况以及后续的数据采集计划。

Speaker: 涤凡 易 (U)

14:20 PandaX-20T Photosensor System Design and Verification

The PandaX (Particle AND Astrophysical Xenon Experiments) project is a staged xenon-based deep experiment at the China Jin-Ping Underground Laboratory. The PandaX detector is now being upgraded to its next generation, PandaX-20T, which features a sensitive volume of about 20 tons to search for rare events, including the detection of dark matter, solar neutrinos, and neutrinoless double-beta decay.
PandaX-20T is building a high-radiopure and high-efficiency photosensor system. The photosensor system comprises two PMT arrays, including 616 two-inch PMTs on top and 433 three-inch PMTs on bottom with a total photocathode coverage at the 10-m2 level. In this talk, we will present the current status of the PandaX-20T photosensor system, with a focus on the R&D of its frontends, including the development of a novel flex-rigid board, PMT modularization assembly for the system integration, as well as the verification tests of the key components.

Speaker: 奕羽 潘 (上海交通大学)

14:30 PandaX-20T超高纯氪氙/氡氙低温精馏塔

为满足PandaX-20T暗物质探测器对超痕量本底需求，本研究自主研发了两套超高纯氙低温精馏系统，分别用于去除探测器介质氙中的氪（Kr）与氡（Rn），目标是将氙中氪浓度降至2 nBq/kg（10-14 mol/mol）、探测器中氡水平从8 µBq/kg降至1 µBq/kg（10-25 mol/mol）以下。PandaX-20T超高纯氙除氪低温精馏系统采用填料塔，提纯速率由PandaX-4T的10kg/h提升至30 kg/h，回流比为191。PandaX-20T超高纯氙除氡低温精馏系统与探测器耦合采用液相大流量精馏，设计流量可达856 kg/h（液相5LPM），为此自主研发了基于R14节流制冷的20 kW大冷量回收循环系统，该系统通过与精馏塔耦合，实现冷量的转移与回收，避免机械部件放氡，攻克了大流量精馏的冷量供给不足问题。目前除氪系统已完成调试，将原料氙中的氪浓度从2ppm提纯到8 ppt（受限于测量能力），为探测器提供850 kg的超高纯氙。PandaX-20T除氡低温精馏系统已建成并进入调试阶段，关键的20kW大冷量回收技术验证成功，为高流量、高效率地将PandaX-20T暗物质探测器中的氪和氡去除到极低浓度，得到超痕量本底，为暗物质探测实验在国际竞争中领先乃至探测到暗物质打下基础。

Speaker: 康康 赵 (上海交通大学李政道研究所)

14:40 CICENNS实验CsI(Na)探测器研制进展与CSNS靶站快中子本底测量

CICENNS实验采用300 kg碘化铯闪烁体探测器，旨在利用中国散裂中子源（CSNS）产生的中微子，实现对中微子-原子核相干弹性散射（CEvNS）的精确测量。CsI(Na)闪烁体以高原子序数带来的相干增强、420 nm发射峰与PMT的最佳匹配、极低本底及弱余辉特性，成为探测CEvNS低能核反冲信号的理想介质。本报告介绍了CICENNS实验的CsI(Na)闪烁体探测器的设计优势、研制进展及性能测试。
此外，为定量刻画CSNS中子束流产生的本底，我们利用EJ276快响应塑料闪烁体的脉冲形状甄别（PSD）能力对CSNS靶站平台约MeV能量的快中子/伽马辐射进行了测量。

Speaker: 学康 郭 (中山大学物理学院)

14:50 A Novel Hybrid Cherenkov–Scintillation Compton Camera for MeV Gamma-Ray Imaging

MeV gamma-ray imaging is important for astrophysics, nuclear physics, nuclear security, and medical physics, but conventional collimated systems often suffer from low detection efficiency. Compton imaging provides a promising alternative by reconstructing the incident gamma-ray direction from event topology.
In this study, we investigate a compact hybrid Cherenkov–scintillation Gamma tracker using Geant4 simulation and Transformer-based reconstruction. The simulated detector consists of a central 5 cm CsI scatterer, surrounded by BGO absorber-bar arrays and SiPM readout planes. The current preliminary study focuses on 1 MeV gamma rays from a fixed source position, selecting events with the first interaction in the CsI scatterer and full energy deposition in the BGO absorber. A multi-task Transformer model is developed to reconstruct event-level quantities from variable-length SiPM photon-hit sequences. The model simultaneously predicts the recoiled electron direction, electron energy, scattered photon direction, and incident gamma-ray direction. The incident gamma opening-angle error is used as the main angular-resolution metric.
Across several simulated incident-direction configurations, including random, fixed-grid, shifted-grid, and radial-ring samples, the model achieves stable incident gamma reconstruction with p68 angular resolution of about 1.6°–1.9° and p90 containment of about 2.4°–2.8°. These preliminary results demonstrate the feasibility of combining a compact hybrid detector concept with machine-learning-based reconstruction for event-by-event MeV gamma-ray imaging.

Speaker: Qiuping 秋平 SHEN 沈 (IHEP,CAS)

15:00 Calibration and validation of a Compton camera for MeV gamma measurement

The astrophysical observations of MeV gamma rays have been limited by the detection technology, the so-called “MeV gap” has existed for long. Opening the MeV window is critical not only for gamma astronomy but also for searching for new physics.
To pursuit a high sensitivity in MeV gammas, a Compton camera using novel scintillators is developed. The Compton camera contains two layers of YSO-pixel array as gamma scatter and one layer of LYSO as gamma absorber, which is a pathfinder of the compact microsatellite project at SJTU. This presentation focuses on the design and calibration of the Compton camera, including the spatial nonuniformity and energy calibration, as well as the corresponding corrections. In addition, we have dedicatedly developed the algorithm to reconstruct the gamma tracks in the experimental data. Using cosmic muons and radioactive gamma sources, we validated the overall performance of the Compton camera and demonstrated its powerful detection ability for gamma in MeV energy range. This Compton camera is planned to piggyback a commercial microsatellite and its future in-orbit performance is promising.

Speaker: 平伟 孙

15:10 为muEDM实验开发的缪子触发探测器

保罗·谢尔研究所（PSI）的muEDM实验旨在以前所未有的灵敏度测量μ子的电偶极矩（EDM），目标精度为$σ(dμ) = 6×10^{-23} e·cm$，这比布鲁克海文国家实验室（BNL）缪子g-2实验确立的当前极限提高了三个数量级。该工作的核心是位于螺线管入口处的μ子触发探测器（TrigDet），它能够快速、精确地识别螺线管存储阈值内的缪子。该触发器会触发脉冲磁场，将μ子引导至稳定轨道；在此轨道上，径向电场使“冻结自旋”技术得以应用，从而分离出由电偶极矩（EDM）引起的自旋进动。

TrigDet 采用由硅光电倍增管（SiPM）读出的塑料闪烁体，由两个子系统组成：一个用于入射缪子探测的厚度不足一毫米的 Gate 探测器，以及一个通过反符合逻辑排除不可存储缪子的Aperture探测器。

该系统确保仅对可存储的缪子进行选择性触发，同时抑制背景事件。在PSI的πE1束线上，利用表面缪子对TrigDet原型机进行了验证，并通过实验数据与基于Geant4的模拟结果的对比分析对其性能进行了评估。本文介绍了关键设计原则、原型机测试结果，以及在实现muEDM实验突破性灵敏度目标方面取得的进展。

Speaker: 幸运 黄 (上海交通大学李政道研究所)

15:20 基于闪烁光纤的高位置分辨粒子探测器的研制与国产化方案

宇宙线缪子作为一种天然的探针，在粒子物理研究中具有重要应用价值。为满足对宇宙线缪子及其他带电粒子径迹的高精度探测需求，本研究成功研制了一套基于硅光管与闪烁光纤的位置灵敏探测器。该探测器由八个探测大层构成，单层有效探测面积为 400 mm × 200 mm。每个大层包含两组X方向与两组Y方向的闪烁光纤阵列，构成二维位置敏感单元。闪烁光纤直接耦合到 3 mm × 3 mm 的硅光管阵列上，每大层共设 128 个X通道与 64 个Y通道，并配备独立FPGA模块实现信号的实时采集与预处理，最终由中央开发板完成数据汇总。本报告重点介绍了该探测器的设计原理、制作工艺与性能测试过程，并对关键部件的国产化替代方案进行了探讨。测试结果表明，探测器具备高探测效率，位置分辨率可达约 1 mm，适用于带电粒子的精确位置测量，且全国产化零部件能够满足仪器性能要求。

Speakers: 栋 刘 (Shandong University) , 亚楠 刘 (山东大学)

15:30 基于液体闪烁体的宇宙射线探测器研究

在中微子和稀有事件探测实验中，宇宙线μ子产生的本底是一个主要问题；而在大型宇宙射线探测实验中，如何在保证良好性能的同时控制成本也是一大挑战。因此，开发低成本、高性能的新型宇宙线探测器具有重要价值，其中基于液体闪烁体的方案展现出良好潜力。本研究通过对比蒙特卡罗模拟与实验测量，评估了基于液体闪烁体和波长位移光纤的探测器的性能，包括光产额、宇宙线探测效率等。实验数据与模拟结果基本一致。此外，研究进一步对比了仅使用液体闪烁体的不同探测器方案，旨在提出一种结构更简化、性能更优的设计。初步结果表明，该方案在宇宙射线观测实验中具有重要的应用前景。

Speaker: 沛升 牛 (NCEPU)

15:40 茶歇

16:10 AI for HEP: A Representation Learning Perspective

XXX

Speaker: Huilin Qu (TDLI, SJTU)

16:30 面向高能物理实验的量子计算进展

XXX

Speaker: 腾 李 (Shandong University)

16:50 Real-Time Analysis at LHCb: From Run 3 Operations to Upgrade II Prospects

The LHCb experiment pioneered real-time analysis (RTA) with a fully software-based trigger operating at the 40 MHz proton–proton collision rate. Leveraging a heterogeneous computing infrastructure and high-performance reconstruction algorithms, the system delivers offline-quality event reconstruction in real time. This talk presents an overview of the RTA framework and trigger strategy employed during Run 3, including real-time reconstruction, calibration and alignment, a selective persistency model, and operational experience. Emphasis is placed on the impact of RTA on physics analyses, computing efficiency, and data management. Finally, the talk discusses the challenges and prospects for LHCb Upgrade II in the HL-LHC era, where significantly increased luminosity and event complexity will require further evolution of the real-time paradigm.

Speaker: Peilian Li (UCAS)

17:00 基于点云模型的高颗粒度 TPC dN/dx 重建方法研究

Particle identification (PID) is essential for future particle physics experiments such as the Circular Electron-Positron Collider (CEPC) and the Future Circular Collider. A high-granularity Time Projection Chamber (TPC) not only provides precise tracking but also enables dN/dx measurements for PID. The dN/dx method estimates the number of primary ionization electrons, offering significant improvements in PID performance. However, accurate reconstruction remains a major challenge for this approach. In this presentation, we introduce a deep learning model, the Graph Point Transformer (GraphPT), for dN/dx reconstruction. In our approach, TPC data are represented as point clouds. The network backbone adopts a U-Net architecture built upon graph neural networks, incorporating an attention mechanism for node aggregation specifically optimized for point cloud processing. The proposed GraphPT model surpasses the traditional truncated mean method in PID performance. In particular, for the CEPC baseline TPC, the K/pi separation power improves by approximately 10% to 20% in the momentum interval from 5 to 20 GeV/c.

pubilished in JHEP: https://doi.org/10.1007/JHEP04(2026)021

Speaker: Guang ZHAO (高能所)

17:10 Quantum GAN-Based Fast Calorimeter Simulation

In high-energy physics experiments, calorimeter simulation involves a wealth of physical interaction processes, and the resulting particle showers encapsulate critical physical information. However, calorimeter simulation also incurs enormous computational resource overhead. Previous studies have addressed the growing computational pressure through machine learning, while quantum machine learning offers potential advantages over classical machine learning in simulation applications. This study explores a fast simulation scheme based on quantum generative adversarial networks (Quantum GAN), focusing on a one-dimensional 8-pixel energy deposition distribution. The scheme adopts a hybrid quantum-classical architecture, employing a parameterized quantum circuit as the generator and a classical neural network as the discriminator for adversarial training. Experiments on an ideal simulator demonstrate that the quantum generator can faithfully reproduce the pixel-wise energy distribution, correlation matrix, and average energy distribution of Geant4 reference data. The model effectively approaches the true distribution within a small number of training epochs, validating the feasibility and effectiveness of this Quantum GAN approach for fast calorimeter simulation.

Speaker: Haozhi Yin (Sun Yat-Sen University)

17:20 基于智能体的软件性能验证系统

在基于智能体的现代软件开发范式中，性能验证作为系统反馈闭环的核心环节，其重要性日益凸显。其中大语言模型构成"大脑"负责认知推理，技能库作为"四肢"执行操作，Agent扮演 "意识指挥"统筹全局，而性能验证系统则是不可或缺的"感官系统"——唯有通过它感知代码变更对系统性能的量化影响，才能实现真正意义上的迭代式开发。
针对高能物理实验离线软件开发者众多、开发周期长、子系统与物理性能指标繁杂、底层代码修改（如几何参数调整）易引发性能连锁反应等独特挑战，我们设计并实现了一套基于智能体的软件性能验证系统。该系统核心包含三大模块：一是筹理解整个验证工作流的智能体内核，可通过解析海量软件生成的物理性能图表与日志，结合Git仓库提交历史与开发上下文完成性能评估，并预留了基于性能缺陷修复代码的扩展接口；二是多端统一的客户端接口，支持网页、终端及Mattermost等平台的指令交互；三是功能完备的可视化仪表盘，实现软件性能实时监控、多版本横向对比与矩阵化CI结果集中展示等功能。
本报告系统阐述了该验证系统的设计理念与开发思路，详细介绍了当前已落地的核心功能，并对未来智能体驱动的全自动性能优化与代码迭代方向进行了展望。该系统为高能物理大型软件的持续集成与质量保障提供了全新的智能化解决方案。

Speaker: 国平 刘 (山东大学)

17:30 Application of the experimental dataset in visualization for the BESIII experiment

Visualization tools are used to display the detector geometry and information of event hits. It plays an important role in physics analysis, data quality monitoring, algorithm optimization, physics education, and public outreach. The BESIII experimental dataset is derived from raw data files containing the events information of electron-positron collisions. These data pass through the detector trigger system, file format conversion, and physics information extraction and finally save the physics information and detector response in text format files. This report will introduce the BESIII visualization software based on ROOT, Unity, and Phoenix, as well as the application of the experimental dataset in visualization.

Speaker: Minghua Liao (SUN YAT-SEN UNIVERSITY)

17:40 北京谱仪III离线软件系统发展与升级

北京谱仪III（BESIII）是运行在北京正负电子对撞机（BEPCII）上的大型磁谱仪，也是目前国际上唯一运行在陶-粲能区的大科学实验装置。自2009年运行取数以来，面向加速器对撞亮度的多次优化提高以及探测器的重大硬件升级，基于Gaudi架构的BESIII离线软件系统历经十余年发展演变，成功攻克了海量数据高吞吐量处理、操作系统适配、以及大规模精密算法迭代等多重关键技术挑战。作为BESIII实验数据处理的核心，该系统集成了精确模拟、数据重建、探测器刻度与物理分析工具等核心功能，不仅确保了实验装置长期、高效、稳定的运行，更为数据产生和数据分析提供了坚实基础，支撑了大量高水平物理成果的产出。本报告将重点阐述BESIII离线软件在应对探测器升级与技术迭代中的关键架构重构、软件现代化策略，以及其为保障持续不断获得实验物理成果所发挥的关键支撑作用。

Speaker: Xiaobin Ji (IHEP)

17:50 3D Magnetic Field Reconstruction and Mapping with Physics-Informed Neural Networks

Accurate reconstruction of magnetic fields in inaccessible regions is vital for many high-precision experiments in physics. Traditional methods, such as spherical harmonic expansion, often suffer from truncation errors that limit their precision. This study proposes an advanced Physics-Informed Neural Network (PINN) framework for high-precision 3D magnetic field mapping. Unlike conventional data-driven models, the proposed PINN integrates Maxwell's equations directly into the loss function, enforcing divergence-free and curl-free conditions across the entire domain. A key innovation is the inclusion of explicit physics-residual losses at measurement locations, ensuring rigorous physical consistency beyond random collocation sampling. Validation using simulated data achieves a reconstruction accuracy of 10^{-4}, a tenfold improvement over existing PINN benchmarks. Furthermore, experimental validation using a custom coil assembly demonstrates robust reconstruction with sub-percent relative accuracy, reaching the 10^{-3} level under ambient conditions. This AI-driven methodology provides a robust, high-precision solution for field monitoring and measurement in complex experimental environments where direct sensor placement is restricted.

Speaker: Bingzhi Li (Zhejiang Lab 之江实验室)

18:10 → 19:30 晚餐

19:30 → 21:00 高能物理分会换届会议及第 十二届委员会第一次会议

Friday, 17 July

08:30 → 12:05 分会1：TeV物理和超出标准模型新物理

Conveners: Chair1：黄燕萍 (高能所) , Chair2：冯波 (华南师范大学)

08:30 Cross section measurement and EFT interpretation of γγ → WW in proton-proton collisions at 13 TeV

This talk will present a measurement of the cross section of W boson pair production in photon fusion (γγ → WW), using an integrated luminosity of 138 fb^−1 of proton-proton collision data collected by the CMS experiment in 2016-2018 at a center-of-mass energy of √s = 13 TeV. Events are selected in the final state with one electron, one muon, and a low multiplicity of tracks associated with the electron-muon production vertex. The total cross section of the γγ → WW production is measured to be 643+82 −78 fb, and a fiducial cross section of 3.96 + 0.53-0.51 fb is measured in a phase space defined with selection criteria close to those of the analysis. In addition, constraints on dimension-8 operators from an effective field theory framework are set.

Speaker: Dayong Wang (Peking University)

08:50 Recent Multi-Boson and Multi-Higgs results from ATLAS

This talk will give a quick overview of recent ATLAS SM Multi-Boson measurement and Multi-Higgs measurement results including the highlight of recent inclusive diboson, VBS polarization, triboson observation, Tri-Higgs search and Di-Higgs combination results by ATLAS, with emphasis of the deep connection of EWSB and Higgs physics.

Speaker: Shu Li (TDLI, SJTU)

09:02 Search for ZZ vector boson scattering in the llvv final state at 13 TeV with CMS detector

We present a search for the electroweak production of two Z bosons in association with two jets at a center-of-mass energy of 13 TeV. The analysis focuses on the decay channel with two charged leptons (electrons or muons) and two neutrinos, which features a relatively large branching fraction but also suffers from sizable backgrounds and incomplete event reconstruction due to the presence of neutrinos.To enhance the separation between the electroweak signal and the dominant backgrounds, a machine-learning based graph neural network discriminator is employed, together with multiple dedicated control regions to constrain background contributions. In particular, a fully data-driven estimation of the Drell–Yan background plays a crucial role in the analysis. The expected (observed) significance in the 2ℓ2ν channel is 2.8 (3.0) standard deviations. When combined with the VBS ZZ 4ℓ channel, the expected (observed) significance becomes 4.5 (5.0) standard deviations, thereby we claim observation of the last electroweak production of vector diboson processes in CMS experiment. In addition, we measure the fiducial cross section and set limits on dimension-8 EFT operators.

Speaker: 宠 刘 (北京航空航天大学)

09:14 Observation of pair production of longitudinally polarised Z bosons in four-lepton final state with the ATLAS detector

A measurement of the production of two longitudinally polarised Z bosons is presented based on proton–proton collision data, recorded by ATLAS during Run 3 of the Large Hadron Collider, corresponding to an integrated luminosity of 164 $fb^{-1}$ at a centre-of-mass energy of 13.6 TeV. The ZZ candidate events are reconstructed using two same-flavour opposite-charge electron or muon pairs. Polarization fractions of the Z boson pair are measured in the fiducial phase space and also in two bins of the four-lepton invariant mass. After a statistical combination with the measurement using Run 2 data, first observation of the production of two simultaneously longitudinally polarised Z bosons is obtained, with the observed and expected significances of 5.5 and 4.8 standard deviations, respectively.

Speaker: Xingyu Wu

09:26 Evidence of 𝒁𝒁𝜸 production with the ATLAS detector

Multi-boson processes are among the most sensitive tests of the Standard Model. Theoretical predictions for these interactions are extremely precise, so even small discrepancies could point to new physics phenomena. Triboson processes are the rarest of this kind, offering unique sensitivity to probe quartic boson couplings and complementarity with Higgs physics and searches beyond the Standard Model. In this talk, we will report the first evidence of simultaneous production of two Z bosons together with a photon (ZZγ) for the first time at the LHC. The measurement is performed using the full Run-2 dataset, recorded from 2015 to 2018, of proton-proton collisions at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 140 fb^{−1}. Eight events are selected, with a background estimate of 0.92 ± 0.15. This results in an observed (expected) significance of the ZZγ final state of 4.4𝜎 (4.4𝜎). The study extends the LHC’s repertoire of multi-boson studies and provides a complementary test to those already observed.

Speaker: Wenjing Wang (Zhengzhou University)

09:38 Identify the b-quark jet using the High-Level Trigger information with the ATLAS detector

To suppress the extremely large QCD multijet background and enhance trigger efficiency for events containing b-quark jets, the ATLAS experiment has developed and deployed trigger chains incorporating b-jet tagging with High-Level Trigger (HLT) information since Run 2. Building on advances in offline b-tagging and the H→bb tagger algorithms, more sophisticated b-tagging techniques have been implemented for Run 3. This talk will review recent b-jet trigger developments, commissioning efforts, and performance using the Run 3 dataset.

Speaker: Bo Liu (南开大学)

09:50 CMS上希格斯玻色子衰变到Z玻色子和光子的寻找

希格斯玻色子衰变到Z玻色子和光子（H→Zγ）是一个由量子圈诱导的稀有衰变过程，其分支比在标准模型预言下仅为1.5×10⁻³。该衰变对希格斯粒子与矢量玻色子（HWW）以及顶夸克（Htt）的耦合同时敏感，是探寻超出标准模型新物理的独特探针。本报告基于大型强子对撞机LHC上的CMS实验数据，系统开展了H→Zγ衰变的寻找与精确测量研究。
首先，利用ATLAS和CMS实验在2015–2018年间采集的质子–质子对撞数据，对应质心能量13 TeV、每个实验约140 fb⁻¹的积分亮度，通过两个实验的联合分析首次给出了H→Zγ衰变的证据，统计显著性达到3.4倍标准偏差。测得的信号产额为标准模型预言的2.2 ± 0.7倍，与理论预期在1.9倍标准偏差内一致。
其次，基于CMS实验单独采集的质心能量13 TeV和13.6 TeV的对撞数据，对应总积分亮度200 fb⁻¹，开展了H→Zγ衰变的搜索，其中Z玻色子通过轻子对（Z→l⁺l⁻，l = e, μ）重建。分析分别针对胶子融合、矢量玻色子联合产生及伴随产生过程进行优化，通过对不同产生道和事件类别中l⁺l⁻γ系统的不变质量分布进行联合拟合来提取信号。在希格斯玻色子质量m_H = 125.38 GeV下，测得的信号强度（实验测量值与标准模型预言值之比）为μ = 1.1^{+0.5}_{-0.6}，观测（预期）显著性为1.9（2.1）倍标准偏差。
以上两项工作互为补充，共同推动了H→Zγ稀有衰变的实验研究，为精确检验电弱对称性破缺机制和探索新物理提供了重要依据。

Speaker: 铭滔 张

10:02 茶歇

10:30 Origin of Mass and Scattering Amplitudes

TBD

Speaker: Hong-Jian He

10:50 格点模拟对称性破缺过程及相关唯象学

本报告汇报我们组近些年在利用格点场论模拟PQ、电弱、QCD对称性破缺过程及相关唯象学研究中的取得的一些进展。

Speaker: 立功 边 (重庆大学)

11:02 Constructing Massive Gauge Theory from Consistency Conditions

Based on the general principles of Lorentz symmetry and unitarity, we introduce two consistency conditions -- on-shell gauge symmetry and strong massive-massless continuation -- in constructing amplitudes of massive gauge theory with elementary particles. In particular we argue that on-shell gauge symmetry can be understood as a consequence of Lorentz symmetry, unitarity and massive-massless continuation. Based on these two conditions, combined with the little group transformation and consistent factorization, we construct 3-point and 4-point vector-boson/scalar amplitudes that correspond to renormalizable interactions, then analyze the underlying theories and models. The corresponding theories include gauge symmetry with S.S.S and Stueckelberg theory. In particular, when the number of vector boson is larger than 3, the theory must be Yang-Mills theory with S.S.B.

Speaker: 俊谋 谌 (暨南大学)

11:14 对散射振幅的隐藏零点、2-分裂性质的理解与推广

近年由Arkani-Hamed、何颂等发现的隐藏零点、以及与零点相伴随的称为2-分裂的新因子化结构，揭示了散射振幅的全新解析性质与物理性质。在这个报告中，我将介绍如何从费曼图、BCFW在壳递推关系、振幅的普适展开这三个不同角度来理解隐藏零点与2-分裂，尝试挖掘其物理图像，并讨论从两个方面推广隐藏零点与2-分裂性质——1.推广到更多物理模型；2.推广到圈图层次的费曼积分被积函数。

Speaker: 康 周 (扬州大学)

11:26 基于因子分解通道的 CHY 积分构造与精确整数约束传播研究

Cachazo–He–Yuan (CHY) 积分为散射振幅提供了一种精炼的代数结构视角。本文从因子分解通道出发，探索了 CHY 积分的潜在构造方式，并在过程中引入精确整数约束传播以保持计算过程的完整性。通过若干多点振幅的实例分析，我们观察到这一方法能够揭示幅散中隐含的结构规律，并在一定程度上系统化多点积分的组织模式。研究表明，通过对局部因子化信息的合理利用，可以在保持整体一致性的同时，提取更具结构性的积分候选。这一思路不仅为低能有效幅散与 CHY 积分之间的关联提供了直观途径，也为进一步理解多点及高圈振幅的潜在规律提供了启示。我们期望该方法能够为后续更高点数、更高圈次振幅的探索提供参考，并在理论分析与数值验证中展现一定的实用价值。

Speaker: 曜勃 张 (宁夏大学)

11:38 The fate of Chiral Gauge theory

The infrared structure of gauge theories with chiral fermions remains largely unexplored. In this work we investigate the Bars--Yankielowicz class using the functional renormalisation group, building on recent developments in gauge--fermion systems that provide clear criteria for confinement and dynamical symmetry breaking.
We show that two distinct phases arise: one exhibiting both confinement and symmetry breaking at small numbers of colours, and another characterised by confinement without symmetry breaking in the large-colour limit. The latter realises a novel regime, opening the possibility of exotic spectra and phenomena that can now be studied within a systematic framework.

Speaker: Dr Hao-Lin Li (Zhongshan University)

11:50 Unveiling Light-Quark Yukawa Flavor Structure via Dihadron Fragmentation at Lepton Colliders

TBD

Speaker: Bin Yan (IHEP)

08:30 → 12:00 分会2：强子物理与味物理

Conveners: Chair1：周小蓉 (University of Science and Technology of China) , Chair2：刘晓海 (Tianjin University)

08:30 Belle II实验的进展

Belle II实验是设计亮度最高的正负电子对撞超级B介子工厂。运行至今，Belle II实验对撞亮度超过0.5x10^35cm-2s-1的水平，采集的B介子数据样本超过Belle实验。Belle II实验正在开展味物理与CP破坏，强子物理与奇特强子态，新物理等领域的广泛研究。报告将介绍Belle II实验的进展，以及实验升级计划。

Speaker: XiaoLong Wang (Fudan University)

08:50 Measurement of ψ(2S)->tautau at BESIII

Using （2259.3 +/-11.1） ×106 ψ（2S） events acquired with the BESIII detector, the branching fraction ofψ（2S） → ττ is measured with improved precision to be（3.240+/- 0.023 +/-0.081） × 10−3, where the first and second uncertainties are statistical and systematic, respectively, which is consistent with the world average value within 1 standard deviation. This value, along with those for the branching fractions of the ψ(2S) decaying into ee and μμ, is in good agreement with the relation predicted by the sequential lepton hypothesis. Combining the branching fraction values with the leptonic width of the ψ(2S), the total width of the ψ(2S) is determined to be （287+/- 9） keV.

Speaker: Jianyong ZHANG (IHEP)

09:05 粲介子单举半轻衰变的唯象学研究

重味强子单举半轻衰变是检验标准模型和研究重夸克动力学的重要过程。已有电子末态的粲介子单举衰变研究可以用于提取 HQET 非微扰参数，为进一步研究缪子末态提供了理论基础。

本报告将介绍我们对粲介子缪子末态半轻单举衰变的研究。在标准模型框架下，我们保留有限轻子质量效应，计算相关衰变宽度，并给出缪子末态与电子末态比值的标准模型预言。这类比值中许多共同理论不确定性可以相互抵消，因此是检验轻子味普适性的较干净观测量。

最后，我将简要讨论该结果对 BESIII 和未来超级 tau-charm 工厂相关测量的意义，以及后续引入更高量纲算符贡献的理论改进方向。

Speaker: Shao Kangkang (HUST)

09:20 Revising the mass of light hybrid mesons: NLO QCD sum rules point to ϕ(2170) as a prime candidate

We present a comprehensive next-to-leading order (NLO) QCD sum rule analysis
for light hybrid mesons with JPC = 1−−, incorporating condensates up to dimension-8 and NLO corrections to the perturbative, gluon condensate, and four-quark condensate contributions. These corrections are found to be substantial and reveal the necessity of contributions beyond leading order. Employing both Laplace (LSR) and Gaussian (GSR) sum rules, our analysis predicts a mass in the conservative range of 2.1−2.4 GeV for the light 1−− hybrid. These predictions are significantly lower than previous leading-order (LO) estimates (around 2.9 GeV) and bridge the gap between QCD sum rules and other approaches. Our findings establish the ϕ(2170) resonance as a prime candidate for the light vector hybrid meson

Speaker: Zhuo-Ran Huang (Jishou University)

09:35 Bc介子半轻衰变中的轻子普适性检验

底强子衰变中的轻子普适性检验是寻找超出粒子物理标准模型的新物理的灵敏探针，也是目前粒子物理实验前沿热点课题。在这个报告中，我们将报告LHCb上关于Bc介子半轻衰变中的轻子普适性检验即R(J/psi)的最新结果。

Speaker: Wenqian HUANG (UCAS)

09:50 Recent Charm Results at Belle II

Following the most precise charm lifetime measurements as the first charm wave, which benefited from improved detector performance, the Belle II experiment has recently obtained a new set of charm physics results based on half of the current Belle II integrated luminosity. I will present these results, covering searches for CP violation in charm particles, hadronic decays of charmed baryons, radiative decays of charmed mesons, partial wave analysis of charmed baryons, and other studies.

Speaker: Dr Longke 龙科 Li 李 (Hunan Normal University)

10:05 茶歇

10:35 New Perspectives on Precision Nucleon Tomography

This talk presents new perspectives on precision nucleon tomography using high-order QCD calculations and jet substructure. I will discuss the winner-take-all axis for extending qT subtraction to jet processes, enabling NNNLO predictions for SIDIS. Novel observables such as one-point energy correlators access the nucleon transversity distribution. Furthermore, we explore quantum decoherence in collider events via effective field theory, linking it to renormalization group evolution. These advances sharpen our understanding of the nucleon tomograph and strong interaction.

Speaker: Dingyu Shao (Fudan University)

10:55 Multi-Hadron Scattering in Lattice Quantum Chromodynamics

Understanding the mechanism of hadronic resonances from first principles is one of the central problems in the study of strong interactions. Lattice Quantum Chromodynamics is currently the only first-principles approach for investigating the nonperturbative properties of quantum chromodynamics. Systems involving three-body decay channels represent one of the frontier directions in modern hadron spectroscopy. In this talk, I will first introduce the basics of lattice quantum chromodynamics, followed by discussions on the construction of multi-hadron operators, the extraction of finite-volume energy spectra, and the formalism of scattering amplitudes. Taking the $D_0^*(2300)$, $\omega(782)$, and $\pi(1300)$ systems as examples, I will present our recent progress in the study of several hadronic resonances.

Speaker: 浩波 燕 (P)

11:10 Spin Asymmetry from Charge and Angle Alone

We propose a probe of the TMD and spin asymmetry in back-to-back deep-inelastic scattering using only the signs and directions of charged tracks, with no calorimetric or particle-identification information required.

Speaker: Xiaohui Liu (Beijing Normal University)

11:25 粲偶素衰变中强与电磁之间的相位研究

强相互作用与电磁相互作用是自然界两种基本相互作用，也是粲偶素衰变中最重要的两类贡献。基于SU(3)理论并结合实验分支比的间接计算表明，J/ψ衰变中的强-电磁相对相位普遍接近90°，而其他粲偶素（如ψ(2S)、ψ(3770)）则呈现出其他可能的取值。目前，该相角是否具有普适性在理论上仍是一个悬而未决的问题，其取值对于理解“ρπ疑难”、“ψ(3770)-nonDDbar衰变”，以及粲偶素各类强子衰变分支比的测量均具有直接输入意义。BESIII实验利用扫描截面方法，对J/ψ、ψ(2S)及ψ(3770)能区若干强子末态的产生截面谱进行了测量，并从中直接提取了该相角。本报告将基于BESIII的扫描实验结果，对该相角问题进行讨论。

Speaker: 雅迪 王 (NCEPU)

11:40 LHCb实验上稀有衰变的研究

标准模型虽然取得了巨大成果，但仍未能回答反物质去哪了，暗物质是什么等重大科学问题，因此寻找新物理是目前粒子物理实验最重要的目标之一。稀有衰变是精确检验标准模型和间接寻找新物理的重要途径。LHCb实验利用海量质子-质子对撞数据能精确研究重味强子的稀有衰变，主要包括味道改变带电流过程、味道改变中性流过程和轻子普适性检验等间接寻找新物理信号，与直接寻找有效互补。

Speaker: 洁晟 俞 (湖南大学)

08:30 → 12:00 分会3：高能重离子物理

Conveners: Chair1：侯德富 (CCNU) , Chair2：周代翠 (Central China Normal University)

08:30 From H-NS to EicC at HIAF

Speaker: 宇翔 赵 (中国科学院近代物理研究所)

08:55 Imaging nuclear structure across energy scales: from heavy to light ions

Speaker: Chunjian Zhang (Fudan University)

09:20 Flavor dependences of polarized fragmentation functions

Inspired by Belle data of $\Lambda$ polarization, the polarized transverse-momentum-dependent fragmentation function (TMD FF) $D_{1T}^\perp$ become a hotspot in both theory and experiments. Several parametrizations of $D_{1T}^\perp$ has been proposed with different assumptions on their flavor dependences. Employing an isospin symmetric framework we studied transverse polarizations of $\Lambda$ in various collisions. Recent measurements of $\Lambda$ polarization in jets by STAR, together with several theoretical progress on nuclear dependences and effective model results, have promoted the research of $D_{1T}^\perp$ to a new phase with more clear knowledge on their flavor structures. We will present our recent progress on this topic.

Speaker: Yu-kun Song (University of Jinan)

09:35 Utilizing event topology analysis to understand the flow-like behavior in small systems

High-energy small system collisions exhibit remarkable flow-like signatures, but separating soft multiple-parton interactions from hard jet fragmentation in the development of collective behavior remains a critical challenge. This talk presents a unified framework leveraging event topology analysis to cleanly isolate flow-like behavior and jet modification effects in small collision systems. By applying a Tsallis Blast-Wave analysis to experimental data using event topological classifiers, we demonstrate that event shape observables serve as a unique approach to removing hard-process biases from flow extractions. Furthermore, we employ topological event background subtraction in proton-proton collisions to directly isolate jet modification effects. Using this approach, we propose event activity dependent baryon-to-meson ratios and jet-free energy-energy correlators as novel probes to study jet energy loss in small systems. Ultimately, this talk establishes that event topology provides a powerful, experimentally accessible toolkit for mapping the evolution of collectivity and jet quenching in small systems.

Speaker: 亮 郑 (China University of Geosciences (Wuhan))

09:50 Dijet production in intermediate x at EIC

The contribution of gluon-photon fusion to dijet production in deeply inelastic scattering is typically analyzed in the small-x regime, whereas quark-photon scattering dominates at large x. The transition between these regimes has received less attention. In this work, we calculate the leading-order, twist-four gluon-photon fusion contribution within a generalized high-twist framework for the intermediate-x region (0.001 < x < 0.1). Comparison with quark-photon scattering, our calculation shows the gluon-photon channel grows as x decreases, becoming indispensible for x < 0.1. These results bridge dijet dynamics across x, connecting large-x LPM effects with small-x saturation phenomena, thereby informing the development of event generators for deeply inelastic scattering at electron-ion colliders.

Speaker: Yuanyuan Zhang (Central China Normal University)

10:05 茶歇

10:35 重离子碰撞中的重味物理研究进展

Speaker: Xiaoming Zhang (Central China Normal University)

11:00 Spin-dependent azimuthal asymmetry of coherent $J/\psi$ photoproduction in peripheral PbPb collisions with CMS

The Lorentz-boosted electromagnetic fields of relativistic heavy ions serve as intense sources of linearly polarized quasi-real photons. Under the $s$-channel helicity conservation hypothesis, a coherently photoproduced vector meson inherits this polarization, leading to a characteristic second-harmonic ($cos2\phi$) modulation in the azimuthal distribution of its decay products. Such modulation was recently observed for $\rho^0 \rightarrow \pi^+\pi^-$ in heavy-ion UPCs at mid-rapidity, where interference between two indistinguishable photon–nucleus production paths induces a strong correlation between the meson’s transverse momentum and its polarization direction. This correlation diminishes at forward rapidity or in asymmetric collision systems, where the interference is suppressed.

In this talk, we present the first measurement of the $cos2\phi$ modulation in coherently photoproduced $J/\psi \rightarrow \mu^+\mu^-$ decays relative to the impact-parameter direction, estimated using event-plane techniques, providing a more robust estimator of the polarization axis. Both the centrality and rapidity dependence of the modulation are investigated. Compared with previous results for spin-0 final states (pions from coherent $\rho^0$ decays), this new study provides a direct observation of the spin-state dependence of azimuthal asymmetries. Furthermore, we discuss the potential application of the intrinsic polarization of coherently photoproduced vector mesons as a complementary reaction-plane estimator in heavy-ion collisions and small systems (e.g., p-A).

Speaker: 雪丽 化 (华南师范大学)

11:15 Heavy Quark Transport in QCD Matter: From Perturbative to Non-Perturbative Dynamics

We systematically investigate the collisional energy loss ($-dE/dz$) and momentum diffusion coefficients ($\kappa_{T/L}$) of heavy quarks traversing the quark-gluon plasma (QGP) across diverse temperature scales. By employing the soft-hard factorization model, we first compute the transport properties at leading order in the QCD coupling, demonstrating that the full results eliminate the dependence on the arbitrary intermediate separation scale $t^*$. This framework is systematically extended to finite quark chemical potential ($\mu \neq 0$), revealing a pronounced enhancement of transport coefficients in baryon-rich environments. To bridge the gap between the high-temperature perturbative domain and the strongly coupled crossover region ($T \rightarrow T_c$), we incorporate non-perturbative dynamics via two complementary approaches. The introduction of a temperature-dependent Polyakov loop background in a semi-QGP effective theory yields a distinct suppression of the energy loss due to reduced color density. Furthermore, by synthesizing short-range Yukawa screening with a long-range confining string tension into a unified, lattice-constrained interaction kernel, we completely circumvent the traditional reliance on soft-hard momentum cutoffs. This unified non-perturbative model successfully captures the extreme medium opacity near $T_c$, predicting a spatial diffusion coefficient $2\pi T D_{s} \approx 0.5 \sim 1.7$ that exhibits striking quantitative agreement with recent lattice QCD extractions. Ultimately, our results provide a robust and comprehensive dynamical interpretation of heavy-flavor transport spanning both perturbative and non-perturbative regimes.

[1] Jiale Lou, Wu Wang, Jiazhen Peng, Fei Sun, Kejun Wu, Wei Xie, Zuman Zhang, Shuang Li, and Sa Wang, Soft-Hard Factorization of Heavy-Quark Transport in QCD Matter at Finite Chemical Potential, Phys. Rev. D 112, 116001 (2025)
[2] Jiazhen Peng, Kewei Yu, Shuang Li, Wei Xiong, Fei Sun, Wei Xie, Unraveling the collisional energy loss of a heavy quark in a quark-gluon plasma, Phys. Rev. D 109, 096028 (2024)
[3] Wu Wang, Yuqi Luo, Fei Sun, Sa Wang, Jungang Deng, Wei Xie, Shuang Li, and Kejun Wu, Heavy-quark transport across the QCD crossover driven by a lattice-constrained in-medium potential, arXiv: 2604.10889
[4] Jiazhen Peng, Jiale Lou, Fei Sun, Kejun Wu, Wei Xie, Zuman Zhang, Shuang Li, and Sa Wang, Perturbative and non-perturbative properties of heavy quark transport in a thermal QCD medium, arXiv:2510.10294

Speaker: Shuang Li (China Three Gorges University)

11:30 Shear distorted quarkonium and spin alignment

In a quark-gluon plasma, the enormous total angular momentum generated by non-central collisions evolves over time through spin-orbit coupling interactions, eventually converting into the spin component and thereby inducing spin polarization of the particles.
Our work studies the contribution of the shear flow generated by non-equilibrium medium to the spin alignment of the vector meson J/ψ at rest in fluid element. The vector meson J/ψ is composed of a charm quark and an anti-charm quark. By correcting the potential of the J/ψ with the gluon propagator containing the shear tensor in the hard thermal loop approximation, we find that the shear flow affects the wave function of the J/ψ, thereby generating spin alignment. Meanwhile, we obtain the value of $\rho_{00}$ by studying the decay process of the J/ψ into a lepton-antilepton pair.

Speaker: Peiwei Yu (Sun Yat-sen University)

11:45 D-meson production via sequential hadronization in high-energy nuclear collisions

Heavy flavor production serves as an ideal probe of the hadronization mechanism in the hot and dense QCD medium created in relativistic heavy-ion collisions. Heavy quarks acquire elliptic flow through strong coupling with the medium, making v2 a sensitive observable for probing the hadronization time. In this work, we study the production and elliptic flow of Ds and D0 mesons in Pb+Pb collisions within a Langevin dynamics framework for heavy quarks in the QCD medium, combined with the sequential or simultaneous coalescence plus fragmentation at the hadronization hypersurface. We find that, within the sequential hadronization framework, the earlier-produced Ds exhibits a smaller v2 than the D0 in the intermediate pT region. This reversed ordering behavior aligns with preliminary ALICE measurements and provides strong evidence for the heavy flavor sequential hadronization mechanism.

Speakers: Zi-Xuan Xu (Central China Normal University) , Wei Dai (China University of Geosciences)

08:30 → 12:03 分会4：中微子物理、粒子天体物理与宇宙学

Conveners: Chair1：周也铃 (Hangzhou Institute for Advanced Study) , Chair2：张宸 (Northeastern University (China)) , Chair3：徐东莲 (Shanghai Jiao Tong University)

08:30 Recent progress in cosmological first-order phase transitions

Cosmological first-order phase transitions provide a unique window into fundamental physics in the early Universe. Theoretically, they involve intrinsically nonperturbative and nonequilibrium quantum field dynamics. Phenomenologically, they can generate observable stochastic gravitational waves and may also play an important role in explaining the origin of the baryon asymmetry and dark matter. In this talk, I will review recent progress in cosmological first-order phase transitions.

Speaker: Wenyuan Ai (Tsung-Dao Lee Institute, Shanghai Jiao Tong University)

08:50 A 2026 update of cosmological collider physics

A 2026 update of cosmological collider physics

Speaker: Zhongzhi Xianyu

09:10 Gauge-invariant analysis of curvature perturbations from slow first-order phase transitions

When strongly supercooled cosmological first-order phase transitions (FOPTs) are sufficiently slow, super-horizon inhomogeneities can be generated. In this work, we compute these super-horizon curvature perturbations by employing a gauge-invariant, multi-fluid formalism. By resolving the gauge ambiguities inherent in conventional separate-universe simulations, we demonstrate that Primordial Black Holes are unlikely to be produced by these super-horizon inhomogeneities. We also derive a fitting formula for the resulting curvature perturbations and discuss potential observational constraints on FOPTs imposed by limits on primordial curvature perturbations and associated scalar-induced gravitational waves.

Speaker: Ran Ding

09:25 Self-Consistent Parker Bound on Magnetic Monopoles

Magnetic monopoles arise generically in unified theories and offer a natural explanation of charge quantization. Beyond collider searches and cosmic-ray experiments, their flux is constrained by Parker-type bounds requiring galactic magnetic fields to survive monopole energy extraction. We formulate a self-consistent Parker bound anchored in the lowest eigenmode of the galactic mean-field dynamo and convert the resulting limit to the present flux. Small-scale turbulent fields both seed this eigenmode and set the monopole velocity via stochastic acceleration before energy extraction from the coherent field. These unavoidable effects substantially modify the standard extended Parker bound at low and intermediate masses, yielding flux limits robust to primordial magnetic fields unless they are strong enough to be probed by future 21-cm observations.

Speaker: Chen Zhang (Northeastern University (China))

09:33 轴子的近期进展与新方向

轴子的近期进展与新方向

Speaker: Yifan Chen (李政道研究所)

09:53 茶歇

10:24 阿里原初引力波探测实验

阿里原初引力波探测实验

Speaker: Hong Li (高能物理所)

10:39 Late-time Quantum Vacuum Decay and its Cosmological Implications

The existence of a landscape of metastable vacua raises the possibility that our Universe may have undergone quantum vacuum decay at late times. This work explores how such a transition can be tested with cosmological observables, focusing on precision distance measurements and cosmic microwave background (CMB) anisotropies. A set of phenomenological models is constructed in which late-time quantum tunneling changes the vacuum energy and may convert a subcomponent of dark matter into dark radiation, possibly accompanied by domain-wall production. The resulting expansion histories are compared with DESI DR2 baryon acoustic oscillation data; supernova distance measurements from DES-Dovekie, Pantheon+, and Union3; and a compressed CMB likelihood. For quantum-tunneling models, current cosmological distance measurements still allow a 50% decrease in the total vacuum energy for a transition redshift $z_t<1$. The model with dark-matter conversion and domain-wall production provides a good fit to resolve the tension between cosmological observables and the ΛCDM model, with a preferred transition around $z_t∼7$ and about 10% of dark matter participating in the transition. Additionally, CMB anisotropy constraints from bubble nucleation and the associated domain-wall network are derived and shown to strongly restrict slow or sparse late transitions. Applied to the minimal quantum-tunneling model, these constraints allow an $\mathcal{O}(10\%)$ decrease in the total vacuum energy for a transition redshift $z_t$ of order unity. For nonminimal models, dark-matter-density-dependent tunneling can proceed rapidly enough to evade such bounds. These results demonstrate that late-time quantum vacuum decay is a testable cosmological phenomenon and provide a concrete observational handle on metastable-vacuum physics motivated by landscape scenarios.

Speaker: Sida Lu (Sun Yat-sen University)

10:47 Probing the Solar $^8$B Neutrino Fog with XENONnT

XENONnT is a dual-phase liquid xenon time projection chamber operating at LNGS with a 5.9-tonne active target, designed to search for weakly interacting massive particles (WIMPs). As its sensitivity reaches the irreducible background from solar neutrino coherent scattering, the experiment enters a new regime — the "neutrino fog" — where neutrino and dark matter signals become increasingly difficult to disentangle.
We report a 3.3σ measurement of coherent elastic neutrino-nucleus scattering (CEνNS) from solar $^8$B neutrinos using a combined exposure of 6.77 t×yr across three science runs. The inferred $^8$B flux of ($5_{-2}^{+3}$) $\times 10^6 \mathrm{cm^{-2}s^{-1}}$ is consistent with the Standard Solar Model. In the presence of this neutrino fog, a search for light dark matter finds no signal excess, and a near-doubling of exposure improves the median sensitivity to 5 GeV/c² WIMPs by only ~10%, providing a direct experimental demonstration of diminishing returns.
The dataset is further used to measure the weak mixing angle $sin^2 θ_W$ at ~0.02 GeV/c momentum transfer and to constrain new vector mediators and the neutrino magnetic moment, highlighting the versatility of the liquid xenon TPC as a precision probe of both neutrino physics and physics beyond the Standard Model.

Speaker: Kexin Liu (Tsinghua University)

10:55 SPECTRA室温暗光子探测实验

我们将在报告中介绍一种面向暗光子暗物质探测的实验方案及最新原型机实验结果。该方法利用特殊光学结构增强潜在暗光子信号，并在室温条件下开展探测实验。报告将介绍实验中的弱光标定方法与多像素数据分析策略，以提升对微弱暗光子信号的识别能力。目前原型机已有三个月的曝光数据，尚未观测到具有统计显著性的信号，并据此对暗光子暗物质参数空间给出了约束。

Speaker: 思垠 李

11:03 Search for WIMPs with PandaX-4T Run2 Analysis

The PandaX experiment is located at the China Jinping Underground Laboratory, with its latest detector PandaX-4T operating from November 2020 to April 2026. PandaX-4T employs a dual-phase liquid xenon time projection chamber (TPC) to reconstruct the energy and position of incident particles. The latest science run (Run2) of PandaX-4T lasts approximately 437 days, incorporating online distillation and novel calibration methods. This report covers the background composition, signal reconstruction and WIMP analysis progress of Run2, as well as an update plan of PandaX-20T for further WIMP detection research.

Speaker: 佳敏 王 (上海交通大学)

11:11 Break

11:16 Analytic approach to fermionic quasi-bound states in Reissner-Nordström Spacetime

Fundamental fields in the vicinity of black holes can exhibit rich phenomena that potentially yield astrophysically observable signatures. However, exploring these structures typically requires computationally intensive numerical calculations. In this work, we introduce a novel approach combining approximate solutions and a matching scheme to revisit the quasi-bound states of a massive Dirac field outside a Reissner–Nordström black hole. This new scheme enables a compact and unified analytical expression for the energy spectrum, which shows improved agreement with numerical results. Moreover, our findings highlight the critical role of long-lived quasi-bound states in shaping the late-time profile. Numerical verification confirms that this novel oscillatory tail follows a stretched exponential decay law of the form $e^{-\eta t^{1/3}}$. While this contribution eventually fades away in the true asymptotic regime, it may introduce crucial corrections to measurements performed over finite time intervals.

Speaker: 广尚 陈 (山东大学)

11:17 Estimation of the Cosmogenic Li9 Background in the JUNO Experiment

Cosmogenic isotopes such as ${}^{9}\mathrm{Li}$ and ${}^{8}\mathrm{He}$ constitute important correlated backgrounds in the reactor antineutrino analysis of the JUNO experiment, since their $\beta+n$ decays can mimic inverse beta decay signals. In this work, we study the estimation and suppression of the ${}^{9}\mathrm{Li}$ background by using reconstructed muon-track information together with spallation-neutron (SPN) tagging. Muon samples are categorized according to the presence of SPN tags and valid reconstructed tracks. For each category, two-dimensional distributions of the time difference $\Delta t$ and the minimum spatial distance $d_{\min}$ between IBD candidates and associated muons are constructed and fitted to estimate the corresponding ${}^{9}\mathrm{Li}$ rate. In addition, Monte Carlo studies are performed to scan and optimize the veto strategy based on SPN and muon-track information. Preliminary results show that the inclusion of SPN spatial-correlation information significantly improves the identification of ${}^{9}\mathrm{Li}$-associated muons. The optimized muon track/SPN veto effectively suppresses the ${}^{9}\mathrm{Li}$ background while introducing only a small loss of IBD selection efficiency. This study provides useful input for the precise estimation of cosmogenic backgrounds and the optimization of veto strategies in JUNO.

Speaker: 涛 黄 (中山大学)

11:18 中微子物质效应的快速高精度计算以及各站点预测

在太阳中微子以及反应堆中微子的物质效应数值计算中，传统处理通常依赖若干理想化近似。对于地球物质传播，常见做法是采用一维球对称的 PREM 密度模型，并通过一阶近似或等效再生因子描述地球物质效应；对于太阳中微子在太阳内部的传播，则常基于两能级绝热演化框架，结合 Landau-Zener 跳跃概率等解析近似来处理太阳内部的 MSW 转换。这类方法在以往的理论分析和实验解释中具有清晰的物理图像和较高的计算效率。然而，随着太阳中微子和反应堆中微子实验测量精度的不断提升，相关理论预言中的高阶修正、路径依赖以及密度模型细节可能逐渐变得不可忽略。因此，有必要发展和检验更高精度的全数值计算框架，以减少传统近似带来的理论系统误差，并为未来高精度实验结果的解释提供更可靠的参考。

本次分享主要围绕太阳中微子物质效应的高精度数值计算展开，同时其中的地球物质传播框架也可直接推广到反应堆中微子情形。在地球侧，我们引入三维地球密度模型，并采用 Strang splitting 方法实现大批量路径下的快速矩阵指数传播，从而更精细地描述不同入射方向、不同探测器位置以及三维地球结构带来的路径依赖效应。在太阳侧，我们采用更完整的三味传播的数值方案，包括 Commutator-Free 四阶指数积分、Ohlsson-Snellman 方法、Cayley-Hamilton 分解以及自适应步长控制，以减少传统绝热近似的限制。此外，为了降低大规模太阳中微子路径采样带来的计算成本，我们进一步引入无监督机器学习方法，对夜间太阳中微子传播路径进行聚类压缩，在保证计算精度的同时提升整体计算效率。

在计算性能方面，整套框架在单张 A100 GPU，80 GB 显存，上运行时，完整太阳中微子物质效应计算可在约 20–25 分钟内完成；对于反应堆中微子的地球物质传播计算，则仅需约 2–3 秒。这一计算效率使得我们能够进一步对反应堆中微子物质效应中的振荡参数不确定性进行 Monte Carlo 误差传播分析。同时在收敛测试下，以最严格数值设置下的结果作为 benchmark，默认计算配置与该 benchmark 的相对偏差整体可控制在约$10^{−4}$水平。

Speaker: 柯宇 韩 (清华大学)

11:19 IBD selection result, efficiency calculation, and background estimate

Neutrino physics is a frontier and highly active interdisciplinary field in high energy physics. The Jiangmen Underground Neutrino Observatory (JUNO) is a medium-baseline, multi-purpose, large-scale neutrino experiment. The major goals are to determine the neutrino mass hierarchy by precisely measuring the energy spectrum of reactor neutrinos, and it is expected to achieve a 3sigma measurement after six years of data taking. So the energy resolution needs to reach 3% at 1 MeV, and energy scale precision has to be better than 1%.

After the experiment has commenced, it is crucial for JUNO to understand the experimental data, reduce systematic uncertainties, and suppress backgrounds. So this study develops a comprehensive IBD selection strategy based on the real latest dataset. Its main content is that utilizing the prompt and delayed signal characteristics of reactor neutrino (such as the time, distance, and energy features), thereby suppressing accidental backgrounds and improving selection efficiency.

Speaker: 成峰 杨 (SUN YAT-SEN University)

11:20 Detector identifier and geometry management system in the JUNO experiment

Detector identifier and geometry management system plays an important role in every nuclear and particle physics experiment. Jiangmen Underground Neutrino Observatory~(JUNO), a large neutrino experiment whose design started in 2013, has completed detector construction and began data taking in 2025. In this poster, we describe the architecture and implementation of the identifier and geometry management system in the JUNO experiment. The system supports detector unit definition and information mapping, and plays essential roles in both detector hardware and software workflows. In particular, its applications in data acquisition, calibration, simulation, reconstruction, visualization, data quality control, and monitoring are also introduced.

Speaker: Yuning Su (Sun Yat-sen University)

11:21 太阳中微子实验中寻找惰性中微子的灵敏度研究

质量在 2 - 15 MeV 量级的惰性中微子可通过太阳 $^{8}\mathrm{B}$ 中微子混合产生，并部分衰变为 $\nu_{e}e^{+}e^{-}$。其通量和寿命由混合参数 $|U_{eH}|^2$ 和惰性中微子质量 $m_{\nu_H}$ 决定。根据惰性中微子的衰变产物，我们有两种探测方式：探测其在地球探测器中衰变产生的电子对或在探测器外衰变产生的 $\nu_e$。本研究中我们通过模拟得到两种探测方式在 500 吨探测器运行一年下的能谱以及角度分布，结合本底分别给出灵敏度并与现有实验约束比较。两种方式给出的灵敏度在 $(|U_{eH}|^2, m_{\nu_H})$ 空间中互补。

Speaker: 宇涛 朱 (清华大学)

11:22 Spallation Neutron Study at JUNO-TAO

Located 44 m from a reactor core of the Taishan Nuclear Power Plant, the Taishan Antineutrino Observatory (TAO/JUNO-TAO) is a ton-scale liquid scintillator detector with SiPMs operating at cryogenic temperatures, enabling high light yield and excellent energy resolution. Among muon-induced backgrounds, spallation neutrons (fast neutrons from cosmic-ray muon interactions) pose a particular challenge, as they can produce signals mimicking reactor antineutrinos via inverse beta decay. This poster presents a study of muon-induced spallation neutrons at TAO, covering their production rates, characteristics, and potential mitigation strategies.

Speaker: 罗 光 (中山大学)

11:23 HUNT触发与数据处理流程初步研究

HUNT项目拟建设大规模水下中微子探测器，触发与数据处理流程是评估探测器可用性的重要环节。本报告将介绍HUNT项目背景、现有模拟数据处理流程及触发设计思路，并基于典型信号与背景样本讨论其在信号保留等方面的表现。初步研究表明，在当前模拟条件和算法假设下，现有流程对部分典型事例，尤其是级联型事例，表现出实现稳定触发和支持后续分析的潜力，也为HUNT采用20英寸PMT的方案在典型中微子事例中的可使用性提供了初步支持。

Speaker: 培元 褚

11:24 TAO VETO 水箱探测器与muon效率研究

TAO (Taishan Antineutrino Observatory) 是江门中微子实验 (JUNO) 的卫星项目，是精确测量反应堆中微子能谱的前沿装置。TAO探测器距离反应堆44米，位于地平面以下9.6米，宇宙线流强较高。中心探测器 (CD) 外围反符合探测器 (VETO) 负责屏蔽天然放射性并标记宇宙线缪子。作为确保中微子探测精度的关键屏障，VETO的性能与效率直接决定了中微子事例挑选的纯度。本报告将介绍VETO探测器及muon效率分析，并监测探测器效率变化情况。

Speaker: Jiahao Zhang (高能所)

11:25 JUNO VETO 8inch PMT系统测量研究

江门中微子实验（JUNO）的首要物理目标是测量中微子质量顺序和精确中微子振荡参数测量，具有测气中微子、超新星中微子、大气中微子等丰富物理测量目标。中心探测器（CD）部分包含大气中微子事例的测量，为进一步提高江门中微子实验的大气中微子统计量和测量精度，具有重要价值和意义。本报告目标介绍JUNO外层VETO系统特别是8英寸PMT系统，以及与其他子探测器进行关联分析结果。

Speaker: 艺辰 郑

11:26 RELICS-10实验探测反应堆中微子CEvNS的物理潜力

RELICS（REactor neutrino LIquid xenon Coherent Scattering）实验旨在利用液氙时间投影室（Liquid Xenon Time Projection Chamber, LXeTPC）探测反应堆中微子的相干弹性核散射（Coherent Elastic Neutrino-Nucleus Scattering, CEvNS），以精确检验标准模型并搜寻新物理。作为其先导项目，RELICS-10是一台10公斤级原型机，将率先在反应堆环境中实现亚keV能区的CEvNS探测，同时验证关键技术并表征本底。本报告将重点探讨RELICS-10的物理潜力，内容包括CEvNS信号的发现显著度、低动量转移下弱混合角的测量精度，以及对非标准相互作用（Non-Standard neutrino Interaction, NSI）参数和中微子广义相互作用（Neutrino Generalized Interaction, NGI）参数的约束等。这些研究将表明，即便是10公斤级原型实验，也可取得具有竞争力的结果，为升级至50 kg的RELICS装置奠定物理基础。

Speaker: 俊 王 (西湖大学)

11:27 ROOT-based event display for data monitoring in the JUNO experiment

Data quality monitoring (DQM) is essential for taking high quality data in particle physics experiments. Visualization plays an important role in DQM by providing intuitive information of the status of detector and events being collected. Jiangmen Underground Neutrino Observatory (JUNO) is a large neutrino apparatus in Guangdong, China. The SERENA (Software for Event display with Root Eve in Neutrino Analysis) software, which is developed based on the ROOT EVE package, is a visualization tool designed for JUNO. It has been widely used for detector optimization, simulation, reconstruction, event display and physics studies. We have modified the original data reading approach of the software by integrating DQM data files and automatic monitoring tools. It achieves an event stream that automatically refreshes as data files are updated, enabling continuous event monitoring and display without manual switching. The update event display software is highly suitable for continuous observation and event selection, facilitating a better understanding of the detector status and the physical processes occurring within the detector.

Speaker: 即洋 赵 (中山大学)

11:28 Data Quality Monitoring system in the JUNO-TAO experiment

JUNO-TAO, the near detector for JUNO, is designed to provide high-statistics and high-resolution reference energy spectrum for the neutrino mass ordering analysis of JUNO. To achieve this goal, it is necessary to monitor the data quality of the detector operation and provide timely feedback on detector anomalies. In this talk, we present an online Data Quality Monitoring (DQM) system for the TAO experiment. The system contains two main parts. First, a backend Job Server, triggered by Kafka messages, processes RTRAW/ESD data to generate per-channel quality metrics and reconstruction information. Second, a Flask-based Web Server provides interactive visualization service via APIs. Three monitoring functionalities are provided: (1) channel-level SiPM quality monitoring, including the dark count rate (DCR), gain, time-offset, and occupancy, which are displayed as 2D channel maps; (2) long-term detector stability trending of DCR, gain, and the rate of cosmic ray muons passing through the detector; (3) per-run reconstruction monitoring. The system has successfully been deployed for routine TAO data-taking operations and has been running stably since February 2026.
Keywords: JUNO-TAO; Data Quality Monitoring; Channel Quality; Detector Stability; Reconstruction

Speaker: 博文 师 (中山大学)

11:29 Data quality monitoring system in the JUNO experiment

Jiangmen Underground Neutrino Observatory (JUNO) is a large-scale neutrino experiment situated in southern China, primarily dedicated to determining the neutrino mass ordering and exploring other key topics in neutrino physics. JUNO detector has finished detector commission and officially begun data taking on August 22, 2025. The Data Quality Monitoring (DQM) system plays an indispensable role in data taking, data quality control and data analysis in any high-energy physics experiment. In this talk, we present the JUNO DQM system, including its design, development and deployment tailored to the experimental requirements of JUNO. It systematically illustrates the significance of the DQM system and provides guidance for on-duty staff and researchers to better utilize the system for JUNO physics studies.

Speakers: Jize Yang (Sun Yat-Sen University) , Zhengyun You (Sun Yat-Sen University)

11:30 TAO中心探测器刻度

TAO中心探测器刻度主要包括增益(Gain)、时间偏移(Time offset)、暗噪声计数率(DCR)、相对光子探测效率(relative PDE)、外部光学串扰刻度(X-talk)。

Speaker: 健鑫 王 (高能所)

11:31 JUNO-TAO event display based on PHOENIX

The Taishan Anti-neutrino Observatory (TAO) is a satellite experiment of the Jiangmen Underground Neutrino Observatory (JUNO). It is located close to one of the cores of the Taishan nuclear power plant (NPP) and was built to provide a high resolution reference energy spectrum for the neutrino oscillations studies in JUNO.
Event display serves as an indispensable tool in high-energy physics experiments, supporting online data monitoring, data quality validation, detector simulation, event reconstruction, and physics analysis. This work introduces a dedicated event display system for JUNO-TAO based on the PHOENIX framework—a modern, web-based, and widely adopted event display platform in large-scale particle physics experiments.
The developed system can read in the event data files from the JUNO-TAO offline software after data format conversion, and supports integrated visualization of key detector components including the central detector (CD), water tank (WT), and top veto tracker (TVT). It achieves full-event visualization including hit positions, energy deposition, timing information, reconstructed vertices, and particle trajectories.
The system effectively meets the core visualization demands of the JUNO-TAO experiment. It provides an intuitive and reliable platform for data quality checking, reconstruction algorithm tuning, and physics analysis, offering important support for the daily operation and scientific research of JUNO-TAO.

Speaker: 学森 王 (Sun Yat-Sen (Zhongshan) University)

11:32 Reactor Antineutrino Selection and Efficiency Estimation at JUNO-TAO

TAO, a satellite detector of the JUNO experiment, is designed to measure the reactor antineutrino energy spectrum with high resolution. This measurement provides a critical reference for the JUNO analysis. The inverse beta decay (IBD) spectrum carries valuable information on the fine structure of the reactor antineutrino spectrum. To extract the IBD spectrum, an event selection algorithm has been developed, which includes a muon veto as well as cuts on energy, multiplicity, fiducial volume, and distance. TAO started its first physics data-taking phase shortly after the Spring Festival of 2026. Using these first official data, the IBD and accidental event spectra have been successfully obtained for both reactor-on and reactor-off periods. In addition, the efficiency of the selection process has been evaluated. This poster presents the details of the above analysis as the first physics analysis from the TAO detector.

Speaker: 子昂 李 (中山大学)

11:33 Performance of the TAO Central Detector

The Taishan Antineutrino Observatory (TAO, or JUNO-TAO) is a satellite detector of the Jiangmen Underground Neutrino Observatory (JUNO), located adjacent to the Taishan Nuclear Power Plant in Guangdong, China. The detector system consists of a central detector (CD), a water Cherenkov veto detector, and a top veto tracker. Its primary physics goal is to provide a high-precision reference spectrum of reactor antineutrinos for JUNO. The CD contains 2.8 tonnes of liquid scintillator, surrounded by Silicon Photomultipliers (SiPMs) with a high photosensitive coverage of 83.3%. The detector is operated at -50°C to suppress the SiPM dark noise. TAO has commenced stable physics data-taking in February 2026.This poster will present the central detector performance,including light yield,energy resolution,energy non-linearity,the level of electronics noise, and the evolution of event rates. These performance results demonstrate that the TAO detector possesses the necessary capabilities to fulfill its core physics mission.

Speaker: 淏忠 唐 (高能所)

11:34 Detecting the next galactic core-collapse supernova with TRIDENT: Simulation and experimental demonstration

Large neutrino telescopes offer unique opportunities to detect neutrinos from the next core-collapse supernova (CCSN), following the only observation in 1987. The TRopIcal DEep-sea Neutrino Telescope (TRIDENT), a next-generation detector in the South China Sea, is primarily designed for high-energy neutrinos but is also sensitive to MeV-scale bursts from nearby CCSNe. Such events induce a collective rise in noise via inverse beta decay (IBD), where TRIDENT’s pixelized digital optical modules enable high-purity identification of prompt positron–delayed neutron coincidences. The naturally present chlorine in seawater further enhances neutron capture efficiency. In addition to simulations, we validate this approach experimentally using a 10 Bq AmBe source with a single hDOM at CJPL, achieving a >3σ neutron signal significance despite its lower signal intensity compared to a typical Galactic CCSN event.

Speaker: 瑞珂 曹 (李政道研究所，上海交通大学)

11:35 TAO顶部反符合探测器

在台山反中微子实验（TAO）中，宇宙线μ子和它的次级产物是本底的主要来源；因此，对μ子的有效探测对降低本底事例至关重要。
TAO的反符合系统主要由水箱（WT）及顶部反符合探测器（TVT）构成。TVT由160条带波长位移光纤（WLS）的塑料闪烁体（96条200×20×2cm3、64条150×20×2cm3）组成，分为四层，每层40条塑闪交错排列。于2025年9月完成搭建，经调试后整体运行稳定，探测性能满足实验预期目标。

Speaker: 小豪 尹 (中山大学物理学院)

11:36 Detector and Event Visualization based on PHOENIX in the JUNO experiment

Event visualization is critical for data quality monitoring (DQM), physics analysis and outreach in high energy physics (HEP) experiments. In this work, we present the development of a web-based event display for JUNO using the PHOENIX framework, a TypeScript and three.js based tool widely adopted by ATLAS, CMS, CEPC and JUNO-TAO. Event display includes two components: detector geometry visualization and event data visualization. We convert JUNO detector geometry from GDML to ROOT format, extract detector components such as the central detector, water pool, and top tracker, and import them into PHOENIX. We also establish a workflow to map JUNO event data models (EDM) to JSON for web visualization. A preliminary PHOENIX based event display for JUNO has been implemented. This web-display provides a portable, interactive tool for JUNO detector monitoring and physics event presentation.

Speaker: 佳琪 吕 (中山大学)

11:37 Muon induced fast neutron study at JUNO-TAO

Fast neutron background is one of the dominant backgrounds in JUNO-TAO, originating from veto muons and untagged muons. Fast neutrons in the liquid scintillator produce a prompt signal through proton recoil and a delayed signal through neutron capture, forming IBD-like coincidences that can distort the measured antineutrino energy spectrum. In this work, we perform a dedicated muon-induced fast neutron study using both Monte Carlo simulation and real TAO data. Based on this combined analysis, we obtain the fast neutron energy spectrum in JUNO-TAO and provide a corresponding uncertainty evaluation. These results provide an essential input for background control and systematic uncertainty reduction in JUNO-TAO precision neutrino spectrum measurements.

Speaker: 志鹏 刘 (IHEP)

11:38 基于地球中微子方向性探测的钾-40中微子探测以及地球大尺度地质结构成像预研

由钾-40衰变和铀-238、钍-232衰变链释放出的地球中微子可以充当探测地球内部化学组成的独特探针。本研究拓展了基于切伦科夫液体闪烁体的地球中微子方向性探测方案，使用中微子-电子弹性散射过程探测中微子信号，使用模拟得到了中微子信号方向重建的分辨率，并利用太阳角的筛选条件有效压低了太阳中微子本底。只考虑太阳中微子这一本征本底时，该方案预计在2.8千吨·年的曝光量下，实现钾-40地球中微子$3\sigma$显著度的探测灵敏度。本研究还探讨了基于该方案进行地球大尺度地质结构成像的可行性，并预计在10.6千吨·年的曝光量下以$3\sigma$的显著度排除地球中微子方向均匀分布的假设。

Speaker: 昊哲 孙 (清华大学)

11:39 Waveform Reconstruction Pipeline and Performance in TRIDENT

The TRIDENT neutrino telescope is a planned next-generation deep-sea neutrino observatory to be deployed in the South China Sea. Precise reconstruction of astrophysical neutrino interactions, including efficient flavour identification, requires accurate determination of photon arrival times and charge information recorded by the detector photosensors. To achieve this, TRIDENT will employ high-performance photomultiplier tubes together with full waveform readout and reconstruction techniques. In this work, we present the waveform reconstruction pipeline developed for TRIDENT, incorporating detailed laboratory characterisation of detector responses within a full-chain detector simulation framework. We evaluate the performance of the reconstruction methods in terms of timing precision, charge reconstruction accuracy, computational efficiency, and robustness under realistic detector conditions. In addition, we study the impact of waveform reconstruction on the reconstruction performance of neutrino-induced track- and cascade-like events across all neutrino flavours. These results establish an important foundation for future event reconstruction and physics analyses in TRIDENT.

Speaker: 淑华 郝

11:40 Prospects of detecting prompt atmospheric neutrinos with TRIDENT

The search for astrophysical neutrinos is largely limited by atmospheric neutrinos, which act as the primary background. At high energies, the prompt component from charm-hadron decays is expected to overtake the conventional atmospheric flux, owing to its harder energy spectrum. However, this prompt flux has so far escaped experimental measurement, making it one of the leading sources of uncertainty in background estimations and a crucial testing ground for hadronic interaction models. Here we investigate the potential of TRIDENT, a proposed next-generation neutrino telescope, to deliver the observation of the atmospheric prompt neutrino flux.

Speaker: 炜伦 黄 (上海交通大学李政道研究所)

11:41 Track Direction Reconstruction and Noise Filtering for TRIDENT Phase-I

High-energy astrophysical neutrinos provide a unique messenger for studying the origin of cosmic rays, making precise direction reconstruction a key task for neutrino telescopes. However, underwater neutrino detectors operate in optical backgrounds induced by PMT dark noise and radioactive decays, which challenge hit selection and track reconstruction, especially for the early-stage TRIDENT Phase-I detector. In this work, we develop filtering and direction reconstruction methods for track-like events using the multi-PMT optical modules in TRIDENT Phase-I, including noise suppression and likelihood-based reconstruction with PMT orientation information. This study provides a basis for robust track reconstruction in next-generation deep-sea neutrino telescopes.

Speaker: 起超 常 (李政道研究所，上海交通大学)

11:42 Measurements of secondary cosmic ray lithium, beryllium and boron with the DAMPE mission

DAMPE (DArk Matter Particle Explorer) is a space-based particle detector launched in December 2015 to observe high-energy electrons, gamma rays, and cosmic rays. Secondary cosmic ray fluxes serve as key probes of the propagation and interaction of high-energy particles in the Galaxy. Spectral measurements of secondary nuclei, such as lithium, beryllium, boron, as well as their ratios to primary fluxes, are fundamental for improving our understanding of cosmic ray acceleration and propagation. This work presents the latest results from DAMPE’s data analysis, including the spectral measurements of lithium, beryllium, boron and their ratios, spanning energies from a 10 GeV/n to several TeV/n with 9 years of DAMPE flight data.

Speaker: 恩珩 徐 (中国科学技术大学USTC)

11:43 Understanding the Origin of Cosmic-Ray Electrons

The electron flux measured by the Alpha Magnetic Spectrometer exhibits complex energy dependence. In the entire energy range the electron and positron spectra have distinctly different magnitudes and energy dependences. At high energies, AMS data show that the electron spectrum can be best described by the sum of two power law components and a positron source term. This is the first indication of the existence of identical charge symmetric source term both in the positron and in the electron spectra and, as a consequence, the existence of new physics.

Speaker: 尚霖 李 (高能所)

11:44 High-Energy Solar Energetic Particles measured by the Alpha Magnetic Spectrometer.

After fifteen years of operation on board the International Space Station, AMS has performed precise measurements of high-energy solar energetic particles (SEPs), mostly observed during the solar maxima of cycles 24 and 25. AMS has collected data on more than 60 high-energy SEP events accelerated during M- and X-class flares and associated with fast coronal mass ejections. AMS detects these SEPs in the GV rigidity range with fine resolution at percent-level accuracy. A summary of these events, including details on the latest SEP events, will be presented.

Speaker: Francesco Faldi (SDIAT)

11:45 Measurement of Nickel Flux in Cosmic Rays with the Alpha Magnetic Spectrometer on the International Space Station

We present the properties of the flux of primary cosmic Ni nuclei in the rigidity range from 3 GV to 1.3 TV, based on 30,000 nuclei collected by Alpha Magnetic Spectrometer during 13.5 years of operation from May 2011 to November 2024. The rigidity dependence of the Ni/Fe flux ratio will be equally discussed.

Speaker: 宇航 尤 (高能所)

11:46 AMS实验ECAL探测器的深度学习重建方法

电磁量能器（ECAL）作为AMS实验中高能电磁簇射测量和粒子鉴别的核心探测器，在电子/正电子能量测量、质子背景抑制、光子方向重建以及高能宇宙线物理分析中发挥关键作用。随着TeV能区统计量的积累，传统基于人工变量和多变量判别的方法在复杂三维簇射形态刻画、能量依赖性建模和极端背景抑制方面面临更高要求。本报告将介绍基于深度学习的AMS-ECAL重建方法研究进展。通过将ECAL的多层三维能量沉积信息转化为适合神经网络处理的图像化输入，并采用残差神经网络（ResNet）结构，可实现对电磁簇射轴方向、入射位置以及电子/质子粒子鉴别的端到端建模。该方法能够自动学习纵向和横向簇射发展特征，增强对高能电磁簇射拓扑结构的识别能力，并为独立于硅径迹探测器的量能器重建提供新的技术路径。这些研究对于提升AMS在高能正负电子谱、正电子超额、可能的暗物质或天体源信号搜索等物理测量中的分析能力具有重要意义。

Speaker: Hai Chen (Zhejiang University)

11:47 AMS-02精确测量宇宙线反质子流强谱及宇宙线基本粒子的性质

AMS-02的精确测量揭示了带电宇宙线基本粒子的特性。在刚度绝对值~60到~500GV范围中，反质子与质子流强有着相同的刚度依赖关系。这一行为表明，相较传统理论中由宇宙线碰撞产生的次级反质子，高能反质子存在超出。同时，反质子流强与正电子流强在~60到~500GV能区中也表现出相同的刚度依赖关系。正电子/反质子流强之比与能量无关，比值大致为常数2。

Speaker: UNKNOWN 杨昊天

11:48 Unique Properties of Daily Proton and Helium Fluxes up to 100 GV

We present the precision measurement of the daily proton and helium fluxes by AMS during 14.5 years of operation aboard the International Space Station. The measurements cover the rigidity ranges from 1 to 100 GV for protons and from 1.7 to 100 GV for helium. The observed fluxes exhibit variations on multiple time scales. On short time scales, recurrent periodicities of 27 are especially visible during the solar minimum of solar cycle 24. Non-recurrent variations of differing intensities are observed during solar maxima. Remarkably, below 2.4 GV, the hysteresis observed between the helium-to-proton flux ratio and the helium flux differs between solar maximum 24 and solar maximum 25. This indicates that, at low rigidity, the modulation of the helium-to-proton flux ratio varies before and after the solar maxima and across different solar cycles.

Speaker: Aleksandr Stuzhin (Shandong Institute of Advanced Technology (SDIAT))

11:49 Solar modulation of cosmic ray electron and positron flux measured with DAMPE

The DArk Matter Particle Explorer (DAMPE) is a satellite-borne cosmic particle detector which was launched on Dec. 17th, 2015 into a sun-synchronous orbit with the tilt angle of 97.4 degree. The high energy resolution and large geometric acceptance make the detector suitable for the cosmic ray electron (plus positron) measurement. In this work, the time-dependent electron flux was measured during the solar cycles 24 and 25 (since the beginning of 2016 up to the end of 2024), including the minimum phase of the former one. The result is helpful for studying the transportation process of cosmic ray electrons in the Heliosphere and the underlying interactions.

Speaker: 杨 刘 (中国科学院紫金山天文台)

11:50 Nonlinear Dependence of Underground Cosmic-Ray Muon Flux on Atmospheric Temperature Variation

The modulation effect of cosmic-ray muon flux measured in underground laboratories with atmospheric temperature has been observed in early underground experiments. The muon event rate is positively correlated with atmospheric temperature changes, which can be explained by the related theories of Barrett, Gaisser, and others. However, at the Daya Bay Neutrino Experiment, a nonlinear phenomenon is observed in the study of the data of the shallower Experimental Halls 1 and 2. To understand this phenomenon, we used the MCEq, which is a numerical calculation tool for atmospheric shower cascade equations, to simulate atmospheric showers, deploying real atmospheric and terrain data, and we reproduced the nonlinear effect of muon flux modulation by temperature observed in the Daya Bay experiment. Furthermore, through simulation methods, we ruled out several factors that could cause the nonlinearity, including mountainous terrain effects, changes in the primary cosmic ray energy spectrum, muon energy losses and decay in the atmosphere, and the scale invariance approximation of hadronic cross-sections in atmospheric showers. In terms of theoretical models, we found that the solutions for meson and muon spectra provided by existing theories are only approximate solutions of the original atmospheric shower evolution equations under high energy, low energy, or isothermal atmospheric conditions and when calculating the linear coefficient of muon flux and temperature change, only the local atmospheric temperature variation is considered. We provided exact solutions of the evolution equations, taking into account the influence of long-range atmospheric temperature variations on muon flux, and developed corresponding theoretical models. These numerical simulations and theoretical developments may explain the nonlinear dependence of underground muon flux on atmospheric temperature found at the Daya Bay experiment.

Speaker: Lei Liao (Tsinghua University)

11:51 Measurement of the cosmic ray nickel energy spectrum from 10 GeV/n to 2 TeV/n with the DAMPE space mission

Nickel, one of the most tightly bound nuclei alongside iron, is the most abundant heavy element beyond iron in cosmic rays. With DAMPE’s excellent charge resolution and broad energy range, a high-precision energy spectrum provides valuable insights into the acceleration sources of heavy nuclei and their propagation through the interstellar medium. In this analysis, we report the direct measurement of cosmic-ray nickel spectrum from 10 GeV/n to 2 TeV/n with nine years of flight data. The nickel spectrum is consistent with a single power law with spectral index $-2.60 \pm 0.03$ from 40 GeV/n to 1 TeV/n. This work provides an accurate measurement of differential flux of nickel with kinetic energy extending to TeV/n for the first time.

Speaker: 浩然 孙 (中国科学技术大学)

11:52 Light Dark Matter Search with 7.8 Tonne-Year of Ionization-Only Data in XENONnT

XENONnT is a dark matter direct detection experiment located at Laboratori Nazionali del Gran Sasso. Featuring a xenon target of 8.5 tonnes, XENONnT utilizes a time projection chamber to detect Weakly Interacting Massive Particles (WIMPs). To further reduce the detection threshold, a method using ionization signals (S2-only) is adopted. This enables sensitivity to nuclear recoils down to 0.5 keV and to electronic recoils down to 0.04 keV, at the cost of additional backgrounds, such as instrumental backgrounds from cathode events, delayed electrons (DE), and accidental coincidence (AC) pile‑up. To address this, we develop the first complete S2-only background model using novel machine learning techniques. A search was then performed using 579 days of data totaling 7.8 tonne·years, and no significant excess is observed. In this presentation, I will talk about the first low-mass dark matter search with a complete S2-only background model in XENONnT, discuss the background modelling and results on a variety of dark matter models

Speaker: 杰 汤 (香港中文大学（深圳）)

11:53 PandaX 实验太阳中微子研究进展

PandaX实验位于四川锦屏山地下约2400米，利用大体量液态氙探测器开展多物理目标研究。在低本底、高灵敏的条件下，PandaX结合大体积、高能量分辨率和严格背景抑制策略，不仅实现了暗物质搜索，也具备对太阳中微子进行探测的能力，为检验太阳模型及探测新物理信号提供重要实验基础。本报告汇报利用 PandaX-4T 数据开展的太阳中微子测量结果。该分析通过利用能谱信息，在探测器相关本底和放射性本底存在的情况下研究太阳中微子信号，进一步结合事例拓扑信息，以约束材料本底成分。未来，PandaX-20T升级版探测器的投运将显著提升灵敏度，有望进一步推动太阳中微子研究，并实现与暗物质探测和双β衰变的协同科学目标。
The PandaX experiment, located about 2400 meters underground at the China Jinping Underground Laboratory, uses large-scale liquid-xenon detectors for low-background, high-sensitivity multi-physics studies. With its large target mass and strict background suppression, PandaX is capable of both dark matter searches and solar neutrino measurements. This report presents solar neutrino results based on PandaX-4T data. The analysis uses spectral and event-topology information to study solar neutrino signals and constrain detector-related, radioactive, and material backgrounds. The future PandaX-20T detector is expected to further improve sensitivity and strengthen the connection between solar neutrino studies, dark matter searches, and double-beta decay research.

Speaker: 智星 高 (上海交通大学)

11:54 TRIDENT Sensitivity to Dark Matter Annihilation in the Galactic Centre

Next-generation neutrino telescopes offer a powerful probe of high-energy dark matter, a regime that remains largely unexplored. We forecast the sensitivity of TRIDENT to dark matter annihilation in the Galactic Centre over $10^3$ to $10^5$ GeV. The analysis is carried out with all-flavour neutrino interactions, showing that cascade-like events can offer a promising search channel, complementary to traditional track events. We further demonstrate that Galactic neutrinos from cosmic-ray interactions with interstellar gas constitute an important background, particularly at high energies, and should be included in future dark matter searches.

Speaker: Yingwei Wang (Tsung-Dao Lee Institute，TDLI)

11:55 Studies of leptogenesis in neutrino flavor symmetry models

Leptogenesis provides an attractive mechanism for explaining the baryon asymmetry of the Universe, while flavor symmetry models offer a natural framework for understanding the observed patterns of neutrino masses and lepton mixing. Motivated by the intimate connection between neutrino mass generation and leptogenesis, this report discusses recent studies of leptogenesis in neutrino flavor symmetry models. We first focus on flavon-assisted low-scale leptogenesis, where flavon fields responsible for generating right-handed neutrino masses also induce new decay channels and additional sources of CP violation, allowing successful leptogenesis at the TeV scale without requiring a highly degenerate right-handed neutrino spectrum. We then examine leptogenesis in left-right symmetric frameworks with the simplest flavor structures, where scalar triplet interactions provide additional contributions to the CP asymmetry and make leptogenesis viable even in scenarios where conventional type-I leptogenesis fails.

Speaker: 妍 邵 (辽宁师范大学)

11:56 Search for solar 8B neutrinos and light dark matter with PandaX-4T

After completing three data-taking runs, the PandaX-4T experiment concluded its operation and was decommissioned in May 2026. A dedicated low-energy analysis of data from the commissioning run (Run0) and the first scientific run (Run1), which combines ionization-only and scintillation-ionization paired events, has significantly enhanced the sensitivity to ultra-low energy recoils. Utilizing these two datasets, we reported a $2.64\sigma$ indication of solar $^8\text{B}$ neutrinos through coherent elastic neutrino-nucleus scattering (CE$\nu$NS) and set the most stringent limits on sub-GeV light dark matter interactions with nucleons and electrons. Moreover, the second scientific run (Run2) has an exposure three times that of the previous data, which is expected to further improve detection sensitivity. The Run2 low-energy analysis is currently ongoing, and this presentation will report on its latest status.

Speaker: 敏祯 张 (上海交通大学)

11:57 Metastable domain wall in scalar model with continuous $U(1)$ symmetry

We discuss a toy model with two scalar fields whose charges satisfy a 1:3 ratio. The symmetry breaking process in this model can generate domain walls either with or without an embedded discrete symmetry breaking. We consider two cases: one in which the vacuum expectation values differ only slightly, and one in which they differ greatly, and we calculate the corresponding gravitational wave spectra.

Speaker: 健钧 华 (中山大学)

11:58 RELICS实验的液氙纯度演化模型与纯化性能预测

RELICS实验计划采用两相型液氙时间投影室（LXeTPC）探测反应堆中微子产生的中微子-原子核相干弹性散射信号（CE$\nu$NS）。为实现亚keV核反冲的探测灵敏度，必须将液氙中的电负性杂质浓度维持在足够低的水平，以避免信号衰减。为此，我们建立了一个能够定量描述探测器内液氙中杂质输运过程的纯度演化模型。该模型综合考虑了运行中循环、液化与气化等输运机制，用以评估实际操作与系统设计对纯化性能的影响。本报告将介绍如何利用两次原型机运行数据对该纯度模型进行构建与验证，并将其应用于未来RELICS探测器纯化性能的预测。

Speaker: 佳辰 于 (中国科学技术大学)

08:30 → 12:00 分会5：粒子物理实验技术

Conveners: Chair1：赵梅 (高能所, IHEP) , Chair2：王大勇 (Peking University)

08:30 下一代高时间与高位置分辨AC-LGAD传感器及专用读出芯片LATRIC研发与测试

交流耦合低增益雪崩二极管（AC-LGAD）作为兼具高时间分辨和高空间分辨能力的4D硅探测器技术，在未来高能物理对撞机实验（如CEPC、FCC等）中具有重要应用前景。本报告将介绍我们在AC-LGAD传感器研发、专用读出ASIC（LATRIC）开发以及配套测试体系方面的最新进展。在条型AC-LGAD传感器研发方面，设计目标为实现约40 ps时间分辨能力与约10 μm空间分辨精度。团队系统研究了关键器件结构参数对时间响应与空间分辨性能的影响，相关测试结果为后续器件优化与结构设计提供了重要依据。针对AC-LGAD的高精度读出需求，团队自主研发了低功耗专用读出ASIC——LATRIC。首款单通道原型芯片LATRIC0已完成功能测试，验证了前端放大、时钟分配、配置电路及数据读出等关键性能，8通道原型芯片LATRIC1已经流片并开展了初步测试，为最终芯片的研制奠定了坚实基础。此外，基于LATRIC0与条型AC-LGAD构建的模块联合测试已获得初步结果，验证了传感器与读出ASIC协同工作的综合性能。为全面评估器件性能，团队已建立多层次的测试平台，包括激光TCT扫描系统、90Sr β源测试平台，并同步推进了束流测试准备工作。后续工作将重点开展大尺寸AC-LGAD结构优化、多通道LATRIC ASIC研发和性能测试、系统级集成测试，并进一步研究器件的抗辐照性能。

Speaker: JiaJian TEOH 张嘉健 (IHEP)

08:45 Wafer-Level Testing Challenges for ALTIROC-A ASICs in the ATLAS HGTD: Performance and Quality Control

ALTIROC-A is the front-end readout ASIC of the ATLAS High-Granularity Timing Detector (HGTD). Its large-scale production requires reliable wafer-level screening before dicing and module assembly. This contribution presents the ALTIROC-A wafer probing campaign, focusing on measured performance, including TDC and jitter characterization, wafer-to-wafer yield spread, and the constraints relevant to large-scale quality control. In the current pre-production campaign, 16 wafers have been probed at IHEP, with an average yield of about 78% under the present acceptance criteria. The contribution addresses the probing-related effects that influence chip qualification and the definition of robust screening rules for production.

Speaker: Hancen LU (IHEP)

09:00 AURORA: A High Performance DAQ Framework for Next-Generation Rare-Event Search Experiments

The upcoming PandaX-xT experiment will deploy over 3,000 readout channels operating at a 500 MSa/s sampling rate, generating a sustained data bandwidth up to 1.6 GB/s. To meet this demanding requirement, we present AURORA, a high-performance, distributed data acquisition (DAQ) framework designed for scalability, low latency, and efficient resource utilization. Built on a modular architecture and leveraging modern I/O and networking technologies, including multi-level buffering, deferred and asynchronous processing, AURORA achieves a projected throughput of over 3 GB/s on the aggregation node in benchmark tests. While developed to support PandaX-xT, the framework is experiment-agnostic and readily adaptable to other large-scale particle and nuclear physics experiments.

Speaker: 弈含 郭 (上海交通大学)

09:10 RELICS实验高缪子通量下的电子学与数据获取系统研发

中微子-原子核相干弹性散射（CEvNS）的精确测量，对于约束标准模型和探测中微子非标准相互作用具有重要意义。双相型液氙时间投影室（LXeTPC）具有信号放大增强和能量阈值低的特点，是探测CEvNS过程的理想技术。RELICS实验采用LXeTPC技术，探测来自中国台州核反应堆的中微子，其主要挑战之一在于抑制由宇生缪子引发的延迟电子本底。本报告将聚焦RELICS实验的主要本底抑制策略，汇报与之相关的电子学读出、缪子反符合探测器以及数据获取系统研发进展。

Speaker: Jijun Yang (SJTU)

09:20 AliCPT 的 μMUX 读出电子学系统

为满足阿里原初引力波探测实验（Ali CMB Polarization Telescope，AliCPT）中超导转变边缘传感器阵列（Transition Edge Sensor，TES）在高通道数、宽带宽、高速读出以及长期稳定运行条件下的电子学读出需求，本文设计并实现了一套微波超导量子干涉器件复用器（Microwave SQUID Multiplexer，μMUX）读出电子学系统。该系统由控制板、中频板（Radio Frequency board，RF board）以及 ZCU111 开发板组成，可覆盖 0 至 4.096 GHz 的连续读出带宽，实现对 μMUX 谐振器阵列的激励、上/下变频、数字化采集以及实时信号处理。系统通过中频板完成射频信号的上/下变频和幅度调节；ZCU111 开发板上集成的高速数模转换器（DAC）和模数转换器（ADC）分别用于产生和采集探测音频梳信号；现场可编程门阵列（FPGA）则实现数字下变频、信道化和信号解调。读出信号通过多相滤波器组（Polyphase Filter Bank，PFB）被划分为相互独立的 2 MHz 带宽频率通道，从而支持多个谐振器的并行读出。基于完整的电子学读出链路，本文对系统输出信号进行了噪声分析，评估了信道化后信号的功率谱密度特性以及电子学噪声水平。相关结果为 μMUX 读出系统的性能优化以及大规模 TES 阵列的应用提供了实验依据。

Speaker: 哲恺 程 (山东大学前沿交叉科学青岛研究院)

09:30 AliCPT-40G望远镜中TDM-SQUID TES阵列的低噪声室温读出电子学

\textbf{摘要：}基于直流超导量子干涉器件（DC-SQUID）的时分复用（TDM）是用于宇宙微波背景（CMB）实验中大型转变边缘传感器（TES）阵列的一项关键读出技术。AliCPT-40G望远镜计划部署一个工作在40 GHz的大规模TES阵列，这要求TDM读出电子学系统具备低噪声、紧凑且高带宽的特性。在TDM系统中，除TES固有噪声外，室温电子学是主要的噪声贡献者，其性能直接影响探测器的能量分辨率。本文设计并实现了一种适用于TDM-SQUID架构的低噪声室温读出电子学系统。该系统集成了TES和SQUID偏置源、磁通锁定环（FLL）读出、数字复用控制以及高速数据采集模块。基于低温下运行的两级TDM SQUID的实测参数，推导了室温电子学在噪声、带宽及压摆率等方面的设计约束条件。测试表明，偏置源实现了极低的等效电流噪声密度：TES偏置低于 0.1 pA/$\sqrt{\text{Hz}}$，SQUID偏置低于 0.26 pA/$\sqrt{\text{Hz}}$。FLL读出电子学提供了高达 1 MHz 的闭环带宽和 0.5 $\Phi_0/\mu\text{s}$ 的压摆率。数字化读出系统基于具备JESD204B串行接口的多通道ADC/DAC器件，显著减小了系统物理尺寸。各通道有效分辨率均超过11.5位。系统支持每通道 2 Gbps 的实时数据传输。本工作为AliCPT-40G望远镜及未来大型TES阵列提供了一套完整的TDM室温电子学解决方案。

\textbf{关键词：}低温学；数据采集电路；数字电子电路；仪器噪声

Speaker: 唐冲 匡 (Shandong University)

09:40 Development of Data Acquisition (DAQ) Software for CICENNS Detector

An efficient and robust Data Acquisition (DAQ) software is vital for the CICENNS detector, which is currently in the assembly and testing phase. This poster presents the development of a DAQ system customized for the CICENNS experiment, featuring synchronized data taking across multiple modules, real-time event and charge monitoring, and a graphical user interface for configuration and control. The architecture supports high-speed data transmission, a wide trigger window (>300 μs) for diverse physics targets, efficient event reconstruction, and real-time monitoring for data quality. Designed for scalability, this system allows for further upgrades. It will become an essential component of the stable operation of the CICENNS detector and will offer significant convenience and flexibility for subsequent data analysis.

Speaker: Tianzi Song (Sun Yat-sen University)

09:50 SCEP实验中磁单极子感应探测阵列实时触发方法研究

磁单极子是大统一理论预言的重要基本粒子，其探测对理解电荷量子化和早期宇宙演化具有重要意义。为此，SCEP 实验组提出了一种基于室温感应线圈的大面积三层磁单极子探测阵列方案，预期总曝光量可达 20000 m2·year。由于探测器规模巨大，连续原始波形数据的存储与传输面临严峻挑战，亟需在线触发系统对候选事件进行实时筛选。针对感应信号信噪比低且磁单极子事件极其稀有的难题，本工作提出了一种基于模板库的在线触发方法，利用并行多模板匹配输入波形并提取最优响应，提高信号检出的概率。结果表明，相比传统的单模板方案，该方法在固定误触发率条件下，将漏检率显著降低。在此基础上，我们在 FPGA 上完成了该算法的硬件实现。系统成功达到了 1 MHz ADC 采样率对应的 1 μs 实时处理延迟要求，为大规模磁单极子感应探测阵列提供了高效、可靠的实时触发解决方案。

Speaker: 喆 曹 (中国科学技术大学)

10:00 茶歇

10:30 HNS科学目标与探测器研制

XXX

Speaker: 宇翔 赵 (中国科学院近代物理研究所)

10:50 HIRFL-CSR 外靶实验 CEE：探测器建设、软件平台与物理展望

XXX

Speaker: Yapeng Zhang (近代物理研究所)

11:10 正反缪子素转化实验（MACE）研究进展

正反缪子素转化实验（MACE）是我国自主提出的下一代缪子物理实验，旨在寻找破坏带电轻子味的正反缪子素转化过程，是研究超越标准模型的新物理的灵敏探针。该实验将依托我国加速器驱动嬗变研究装置（CiADS）规划的高强度表面缪子束流，预期将转化过程的实验灵敏度较当前国际最好水平提高两个数量级以上。目前已完成概念设计，相关成果发表于《Nuclear Science and Techniques》封面文章。研究系统开展了缪子素产生靶、米歇尔电子磁谱仪、正电子输运系统及正电子探测系统的设计与模拟优化，并评估了新物理探测潜力。实验预期单事例灵敏度可达1.3×10⁻¹³，90%置信度转化概率上限为3.8×10⁻¹³，比国际最佳结果8.3×10⁻¹¹提高两个数量级以上。此外，团队还规划了一期实验，将利用电磁量能器、塑闪定时探测器和塑闪光纤径迹探测器预先研究其他缪子稀有衰变过程，在验证探测器性能的同时进一步拓展物理研究范围。MACE实验是我国缪子物理前沿的重要布局，可与粤港澳大湾区多个缪子源建设计划协同，有望在轻子味破坏研究中取得国际领先成果，为探索超越标准模型的新物理提供关键实验证据。本报告将介绍MACE实验及其近期研究进展。

Speaker: Shihan Zhao (Sun Yat-Sen University)

11:25 惠州强子谱仪HHaS

刚刚建成的强流重离子加速器装置HIAF可以提供几个GeV能量的质子和重离子束流，为广泛的物理研究提供了良好的机遇，包括寻找超出标准模型的新粒子、新相互作用，检验CP等基本对称性，寻找新（奇特）强子态、奇特双重子态、新（多奇异）超核，强子、超核性质的精确测量，核物质相边界和相变临界点的发现和定位，等等。我们提议在HIAF高能终端建设惠州强子谱仪，简称HHaS。它由螺线管磁铁、硅像素径迹探测器、LGAD飞行时间探测器、切伦科夫光-闪烁光双读出电磁量能器构成，可以实现1MHz-100MHz的超高事例率、大接受度、多种粒子鉴别能力以及高动量、能量、位置分辨能力，从而满足上述丰富的物理研究需求，促进基于我国实验装置的中高能粒子物理与核物理研究发展。报告将介绍实验的概念设计和初步模拟结果等。

Speaker: Dr 浩 仇 (中国科学院近代物理研究所)

11:40 基于HIAF-HFRS的窄带中微子束流设计与高精度截面测量灵敏度研究

摘要：为了应对下一代长基线中微子振荡实验（如DUNE、Hyper-K）对系统误差的严苛要求，中微子-核子反应截面的精确测量成为关键。本文提出利用我国在建的强流重离子加速器装置（HIAF）中的高能碎片分离器（HFRS）作为π介子动量选择器，通过飞行衰变产生能量展宽仅为~5%的窄带中微子束。通过G4Beamline的模拟，对9.3 GeV质子和4.26 GeV/u氧离子束打靶产生的强子产额、动量筛选后的中微子能谱、束斑及通量特性进行了系统研究。结果表明，该束线可将wrong-sign中微子和电子中微子污染抑制在2%以下，优于现有T2K和NOvA装置约一个量级；通量形状不确定度可控制在百分之一以内。特别地，利用氧离子束可实现π+与π-的近等量产生，为高强度、高纯度反中微子束流提供了独特条件，显著提升反中微子截面的测量精度。预期在五百吨级近探测器中，100天运行时间可对T2K/T2HK能区的缪子中微子-核子散射截面的不确定度压低到5%，为CP相角达到5σ的测量精度提供条件。该方案充分利用了HIAF已建成的设施，有望成为我国中微子物理研究新的重要实验平台。

Speaker: Yu Xu (Advanced Energy Science and Technology Guangdong Laboratory)

12:05 → 14:00 午餐

14:00 → 15:45 粒子物理大会

Convener: Chair: 曹俊 (IHEP)

14:00 TeV物理实验进展综述

Speaker: 肖 朦 (Zhejiang University)

14:30 AI在高能物理中的应用

Speaker: 朱华星 (Peking University)

15:00 AI在物理学中的应用圆桌会议

Speakers: 李 科 (IHEP) , 阮曼奇 (IHEP)

15:45 → 16:15 茶歇

16:15 → 18:00 粒子物理大会: 海报展以及评选

18:00 → 20:00 大会晚宴

Saturday, 18 July

08:30 → 10:00 粒子物理大会

Convener: Chair：何小刚

08:30 暗能量研究进展

Speaker: 张新民 (Institute of High Energy Physics, CAS)

09:00 暗物质探测和双beta衰变

Speaker: 林 箐 (University of Science and Technology of China)

09:30 中微子理论进展、超出标 准模型新物理研究进展综述

Speaker: 于江浩 (ITP, CAS)

10:00 → 10:30 茶歇

10:30 → 12:00 粒子物理大会

Convener: Chair：邹冰松

10:30 高能重离子碰撞物理综述

Speaker: 叶早晨 (South China Normal University)

11:00 强子物理与味物理实验研究进展

Speaker: 柯百谦 (Zhengzhou University)

11:30 强子物理与味物理理论研究进展

Speaker: 璐 孟 (Southeast University)

12:00 → 14:00 午餐

14:00 → 15:30 粒子物理大会

Convener: Chair：曹臻 (高能所)

14:00 国际高能宇宙线探测进展

Speaker: 张寿山 (Institute of High Energy Physics)

14:30 阿尔法磁谱仪实验最新成果

Speaker: 许伟伟 (Shandong University)

15:00 加速器最新原理和技术研究进展

Speaker: 鲁 巍 (Wei LU)

15:30 → 16:00 茶歇

16:00 → 18:30 粒子物理大会: 学术期刊, Scoap3等介绍，晨光杯、最佳墙报等颁奖及闭幕式

Conveners: Chair：梁作堂 (Shandong University) , Closing remark: 高原宁 (Peking University)

18:30 → 20:00 晚餐

Sunday, 19 July

07:00 → 18:00 返程