2026年新物理前沿与交叉科学研讨会 (NPhiS 2026)

15 May 2026, 00:00 → 19 May 2026, 23:59 Asia/Shanghai

2026年新物理前沿与交叉科学研讨会
New Physics and Interdisciplinary Sciences 2026 (NPhiS 2026)

会议宗旨

粒子物理正处于新的发展阶段，与多个领域的交叉不断深化，计算机科学与量子计算等新技术的迅速发展也正在深刻改变我们的研究方式。尽管标准模型是粒子物理的一个巨大成就，但诸如暗物质本质，电弱相变动力学，以及重子数不对称性的来源等基本科学问题，正驱使着我们继续探索自然的深层奥秘。与此同时人工智能，量子计算也正在剧烈地改变基础物理研究的图景。机器学习的快速发展不仅极大拓宽我们的研究边界，也在变革我们的研究范式；量子信息为我们理解量子场论提供了全新视角和工具；而新兴的量子技术则为精密测量和量子模拟开辟了前所未有的可能。

为响应国家鼓励原始创新、推动学科交叉的战略导向，南京师范大学特此举办“2026年新物理与交叉科学研讨会（NPhiS 2026)”。本次研讨会旨在汇聚粒子物理以及前沿交叉领域的专家，为大家提供一个高水平交流平台。我们诚挚邀请各位专家同仁莅临历史文化名城南京，与我们共同探索新物理的前沿领域。

核心议题

• 新物理模型与希格斯物理 (New Physics Beyond the Standard Model & Higgs Physics)

• 早期宇宙相变与原初引力波 (Cosmological Phase Transitions & Gravitational Waves)

• 暗物质与中微子理论与探测前沿 (Theory and Detection Frontiers of Dark Matter & Neutrino)

• 味物理与新物理（Flavor Physics and New Physics)

• 量子信息、模拟与基础物理 (Quantum Information, Simulation & Fundamental Physics)

• 人工智能驱动的物理学创新 (AI-driven Innovations in Physics)

会议日程：

    2026年5月15日：报到注册
    2026年5月16-18日：会议
    2026年5月19日：离会

会议网址：https://indico.ihep.ac.cn/event/28588/ 

会议地址：南京维景国际大酒店

注册信息：

    注册截止日期：2026年4月26日
    报告摘要提交截止日期：2026年4月26日
    注册费：教师/博后：1500元人民币；学生：1000元人民币

主办单位：南京师范大学，南京师范大学前沿物理与交叉科学研究院高能物理中心， 彭桓武科教合作中心，南京市天体和粒子交叉重点实验室

会议组委会：Ariel Arza，Peter Athron (Co-chair)，蒋民源，刘宁，卢致廷 (Co-chair)，武雷，吴永成 (Chair)，肖振军，邢志鹏，张嫣，朱瑞林

会议联系人：
       Peter Athron（peter.athron@coepp.org.au），
       吴永成（ycwu@njnu.edu.cn），
       张嫣（zyan@njnu.edu.cn）

 

Conference Scope

We are witnessing the dawn of a new era where the frontiers of high-energy physics and cosmology are increasingly intertwined and rapid developments from computer science and quantum information are transforming how we work. 

While the Standard Model stands as a triumph of particle physics, fundamental mysteries—such as the nature of dark matter, the dynamics of electroweak phase transitions, and the origin of the baryon asymmetry—compel us to look beyond, specifically at the interface where the microscopic world of particles meets the macroscopic evolution of the cosmos.   At the same time artificial intelligence, quantum information science, and quantum technologies are reshaping the landscape of fundamental physics.  Rapid developments in machine learning are dramatically shifting the boundaries of what can be investigated and revolutionizing how we do it, while quantum information is delivering new insights and conceptual tools for understanding quantum field theory and emerging quantum technologies are opening new possibilities for simulation and precision measurement.

In alignment with the national strategic initiative to foster interdisciplinary research and original innovation,  we introduce the 2026 Workshop on New Physics and Interdisciplinary Sciences (NPhiS 2026)  to bring together leading experts working at the cutting edge interfaces between particle physics, cosmology, quantum information and computer science.  Hosted by Nanjing Normal University, the workshop aims to provide a high-level platform for researchers to inspire innovative ideas. We warmly invite you to join us in the historic city of Nanjing to explore the uncharted territories of new physics.

Key Topics

• New Physics Beyond the Standard Model & Higgs Physics

• Cosmological Phase Transitions & Gravitational Waves

• Theory and Detection Frontiers of Dark Matter & Neutrino

• Flavor Physics and New Physics

• Quantum Information, Simulation & Fundamental Physics

• AI-driven Innovations in Physics

 

Indico: https://indico.ihep.ac.cn/event/28588/

Venue: Grand Metropark Hotel Nanjing

Date: 2026-05-15 to 2026-05-19

Schedule: 

    2026-05-15 Registration
    2026-05-16 to 2026-05-18 Talks
    2026-05-19 Departure

Registration:

     Registration deadline: April 26th, 2026
     Abstract submission deadline: April 26th, 2026
     Registration fees: 1500 CNY for faculties and postdocs, 1000 CNY for students

Host: Nanjing Normal University, The Center for High Energy Physics (CHEP) Institute of Physics Frontiers and Interdisciplinary Sciences, Peng Huanwu Center for Collaboration in Science and Education

Committee: Ariel Arza, Peter Athron(Co-chair), Min-Yuan Jiang, Ning Liu, Chih-Ting Lu(Co-chair), Lei Wu, Yongcheng Wu(Chair), Zhenjun Xiao,  Zhipeng Xing, Yan Zhang, Ruilin Zhu 

Contacts:
       Peter Athron (peter.athron@coepp.org.au)
       Yongcheng Wu (ycwu@njnu.edu.cn)
       Yan Zhang (zyan@njnu.edu.cn)

Friday, 15 May

13:00 → 21:00 Registration

16:30 → 20:00 Dinner

Saturday, 16 May

08:00 → 08:30 Opening and Photo

08:30 → 10:10 Plenary - 61

Convener: Yi Liao (IQM, South China Normal University)

08:30 Probing Cosmic Ray Composition and Muon-philic Dark Matter using GeV Muon sources

We propose here a set of new proposals and some preliminary experimental results involving probing and knocking with muons (PKMu). There is a wealth of rich physics to explore with GeV muon beams either from dedicated beam or cosmic source. Examples include but not limited to: muon scattering can occur at large angles, providing evidence of potential muon-philic dark matter or dark mediator candidates; muon-electron scattering can be used to detect new types of bosons associated with charged lepton flavor violation; precise measurements of GeV-scale muon-electron scattering can be employed to probe quantum correlations.

Refs: https://arxiv.org/abs/2507.23458 and https://arxiv.org/abs/2503.22956

Speaker: Qiang Li (School of physics, Peking University)

08:55 The Migdal Experiments

The observation of Migdal process

Speaker: 倩 刘 (University of Chinese Academy of Sciences)

09:20 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)

09:45 From Symmetry Breaking to Bound State: H → 𝜇𝜇 and Toponium

This talk will review the recent H → 𝜇𝜇 and toponium results from the ATLAS experiment at the Large Hadron Collider. For H → 𝜇𝜇 search, an excess of events over the background is observed with a significance of 3.4σ. This result provides evidence for the H → 𝜇𝜇 decay with ATLAS data and offers a direct probe of the Higgs-boson Yukawa coupling to second-generation fermions. For toponium search, an excess of events is observed over the baseline perturbative QCD prediction with an observed significance of 8σ. This excess is consistent with the formation of color-singlet, S-wave, quasi-bound t¯t states as predicted by non-relativistic QCD.

Speaker: Haifeng Li (Shandong University)

10:10 → 10:30 Coffee Break

10:30 → 12:10 Plenary - 62

Convener: Jin Min Yang (ITP, Beijing)

10:30 TBD

TBD

Speaker: 红建 何 (TDLI)

10:55 What do experiments tell us about supersymmetry

What do experiments tell us about supersymmetry

Speaker: Junjie Cao (Zhenzhou University)

11:20 BNV nucleon decays in the landscape of effective field theory

In the talk, I will summarize our recent works on the study of baryon-number-violating nucleon decay modes, either with or without a new light particle in the final state. In light of the current and upcoming neutrino expriments, a solid theoretical description of all possible kinematically allowed decay modes is urgent. We work within the low energy effective field theory (LEFT) plus chiral perturbation theory (ChPT) framework, and construct the relevant LEFT operators and their corresponding hadronic chiral counterparts. Within the chial framework, we formulate the general expressions of the nucleon decay widths and analyze their characteristic experimnetal signatures, which facilitate experimental searches for those nucleon decays.

Speaker: Dr Xiao-Dong Ma (SCNU)

11:45 Decoherence as renormalization group flow: quantum information loss in high energy collisions

We present a new framework to calculate spin decoherence from final-state radiation by combining soft-collinear effective theory with open quantum system formalism. Our central discovery is that the renormalization group evolution of the density matrix constitutes a quantum channel, where the flow of energy scales drives a Markovian loss of quantum information. We derive the first analytical, all-orders prediction for entanglement suppression as a function of detector resolution. This work establishes a rigorous theoretical tool for connecting experimental capabilities to the preservation of quantum coherence at the energy frontier.

Speaker: Dingyu Shao (Fudan University)

12:10 → 13:30 Lunch

13:30 → 15:35 Plenary - 63

Convener: Xiaohui Liu (Beijing Normal University)

13:30 Probing ultralight axion-like dark matter with pulsar arrays

Ultralight axion‑like dark matter (ALDM) is a well‑motivated candidate whose wave‑like nature is manifest on astronomical scales. Pulsar timing arrays (PTAs) and pulsar polarization arrays (PPAs) offer complementary probes: PTAs search for ALDM imprints on pulse arrival times, while PPAs target linear polarization angle rotations induced by the axion–photon Chern–Simons coupling. In this talk, I will review the status of ALDM searches with PTAs and PPAs, stressing in particular the importance of accounting for the characteristic spatial correlations of the ALDM field. I will also discuss recent efforts to combine timing and polarization data, with the aim of enhancing the ability of pulsar arrays to identify ALDM signals in real observations.

Speaker: 婧 任 (高能所)

13:55 Strong-field QED and high-intensity laser impact on new physics

I will first introduce the framework of strong-field QED and then propose the high-intensity laser assisted search for dark particles such as axion-like particle or dark photon.

Speaker: Tong Li (Nankai University)

14:20 Probing Ultralight Dark Matter with Laser Interferometers in Space

Ultralight dark matter (ULDM) is a popular dark matter candidate. Here we show future gravitational-wave laser interferometers in space, such as LISA, Taiji and Tianqin, would be able to explore the parameter space of ULDM that other experiments can not, improving by several orders of magnitude.

Speaker: Yong Tang (University of Chinese Academy of Sciences)

14:45 Unveiling Light-Quark Yukawa Flavor Structure via Dihadron Fragmentation at Lepton Colliders

Directly probing light-quark Yukawa couplings and their flavor structure remains a major challenge due to their smallness and overwhelming QCD backgrounds. In this Letter, we propose a theoretical framework to access these couplings at lepton colliders through transverse spin dependent azimuthal modulations in dihadron fragmentation.
These modulations arise from the interference between Higgs mediated and Standard Model amplitudes in $e^-e^+\to q\bar{q}Z$, producing angular structures that are linearly sensitive to the Yukawa couplings $y_q$, in contrast to conventional observables that scale as $y_q^2$. By combining channels with an identified accompanying single hadron, $h^\prime=\pi^\pm,K^\pm$, and $p/\bar{p}$, this approach cleanly disentangles the up- and down-quark Yukawa contributions, yielding typical limits at the $\mathcal{O}(10^{-4})$ level and establishing fragmentation dynamics as a novel and complementary probe of the Higgs flavor structure.

Speaker: Prof. Bin Yan (IHEP)

15:10 Probing lepton flavor mixing in $W_R$ searches with machine learning at the LHC

In this talk, I will discuss the LHC reach for probing the right-handed neutrino mixing matrix via the Keung–Senjanović process, $pp \to W_R \to \ell N_R \to \ell\ell jj$, focusing on both same-sign and opposite-sign dilepton final states with different lepton flavor combinations. I will show that machine learning technique significantly enhances the sensitivities to the masses of $W_R$ and $N_R$, as well as to the lepton flavor mixing parameters. I will also discuss how this collider search complements low-energy searches for charged lepton flavor violation.

Speaker: Gang Li (Sun Yat-Sen University)

15:35 → 15:55 Coffee Break

15:55 → 18:00 Plenary - 64

Convener: 国利 王 (河北大学)

15:55 真空衰变的理论与数值计算

报告将汇报一下我们近几年在有限温微扰计算和数值模拟方面的进展。

Speaker: 立功 边 (重庆大学)

16:20 Glueball Dark Matter：From Gravitational Waves to Direct Detection

This talk presents a unified discussion of glueball dark matter and related composite states in confining dark Yang–Mills sectors. I will first review lattice-inspired effective descriptions of dark confinement and chiral dynamics, and show how the associated phase transitions can lead to potentially observable gravitational-wave signals, especially in fermionic and near-conformal regimes. I will then discuss the nonperturbative thermal evolution of the dark-gluon–glueball system and its implications for controlled predictions of scalar glueball dark matter relic abundance. Building on this framework, I will introduce composite glueball axion-like particles generated by θ terms and heavy-fermion portals, as well as recent progress in direct detection based on a tensor-Pomeron-inspired effective field theory. This approach matches ultraviolet portal operators to nonperturbative glueball amplitudes and provides a quantitative path toward recoil searches and light-portal scenarios consistent with collider constraints. Overall, the framework connects dark confinement, cosmological evolution, and experimental probes of strongly coupled dark sectors.

Speaker: Zhi-Wei（志伟） Wang（王） (University of Electronic Science and Technology of China (UESTC))

16:45 Impact of Cosmological Phase Transitions on FIMP Dark Matter

For feebly interacting massive dark matter particle (FIMP) dark matter, variations in particle mass during cosmological phase transitions can affect the dark matter production mechanism. Meanwhile, reheating, entropy injection, and phase coexistence during phase transitions, especially supercooled phase transitions, also influence the evolution of dark matter abundance to varying degrees. This talk will review their overall impacts on the relic density for different FIMP DM scenarios.

Speaker: Yang Zhang (Henan Normal University)

17:10 Primordial black holes from slow cosmic phase transitions

In this talk I will discuss primordial black holes form from slow first-order phase transitions based on the perturbation theory of general relativity.

Speaker: Ke-Pan (柯盼) Xie (谢) (Beihang University (北京航空航天大学))

17:35 The nontopological and topological strings in the grand unified theories

In this talk, I describe the instabilities of the nontopological strings, and the stability of the topological strings in the class of grand unified theories based on SU(N>5) gauge symmetries. The stability analysis will be based on the 331 model, which is a possible effective theory of such grand unified theories.

Speaker: 宁 陈 (Nankai University)

18:30 → 20:30 Banquet

Sunday, 17 May

08:00 → 10:05 Plenary - 71

Convener: 太傅 冯 (河北大学物理系)

08:00 Muon g-2 and EDM: Precision Probes of New Physics

缪子反常磁矩(Muon g-2)是检验标准模型并寻找新物理最敏感的精确观测量之一。费米缪子反常磁矩实验最新发布最终结果，将测量精度推进至0.127 ppm，标志着储存环方法达到了新的里程碑。与此同时，围绕缪子反常磁矩的理论计算、强子贡献及独立实验检验仍存在若干关键问题。另一方面，缪子电偶极矩作为互补的精密探针，对探索新的CP破坏机制和轻子相关新物理具有重要意义。报告将介绍Muon g-2最终结果及其物理意义，并展望EDM等未来精确测量实验方向。

Speaker: Prof. Liang Li (Shanghai Jiao Tong University)

08:25 Recent status and prospects of CDEX dark matter search at CJPL

The CDEX program aims at the direct detection of light dark matter candidates with an array of germanium detectors at the China Jinping Underground Laboratory (CJPL). Searches for the modulation effect of light WIMPs, WIMP-nucleus interactions via the Migdal effect, dark photons, solar axions and axion-like particles have been carried out based on the CDEX-1 and CDEX-10 experiments. Currently, the CDEX-50 dark matter experiment is under construction and testing. Recent status and prospects of the CDEX dark matter program will be described and discussed.

Speaker: 丽桃 杨 (Tsinghua University)

08:50 利用XENONnT寻找太阳中微子和轻质量暗物质

对中微子和暗物质本性的理解是当今物理学和天文学最重要的问题之一。过去30多年来，科学家们发展了一套基于深地实验室的暗物质直接探测方法，测量灵敏度提升了6个数量级。XENONnT是运行于意大利Gran Sasso地下实验室的液氙暗物质探测实验，其中6吨高纯氙原子用于捕捉暗物质和中微子产生的稀有信号。自运行以来，XENONnT已经获得采集了3批实验数据，总曝光量达到7.8吨x年。我将介绍XENONnT近期基于这些实验数据取得的太阳中微子和轻质量暗物质探测结果。

Speaker: Fei Gao (Tsinghua University)

09:15 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)

09:40 Gravitational Wave detection with a Novel Mössbauer Spectrometer

Under the local gravitational field, perturbations from gravitational waves can cause a vertical shift of the Mossbauer resonance height. Considering a stationary scheme with the Ag-109 isotope, we demonstrate that the extremely high frequency precision in Mossbauer resonance allows for competitive gravitational wave sensitivity from KHz up to above MHz frequencies. Mossbauer resonance can offer a novel and small-sized alternative in the quest of multi-band gravitational wave searches, with potential to measure gravitational wave direction and polarization at high precision.

Speaker: Huaqiao ZHANG (IHEP)

10:05 → 10:30 Coffee Break

10:30 → 12:10 Plenary - 72

Convener: Xin-Qiang Li (Central China Normal University)

10:30 Agentizing the scientific frontier

AI agent based on Large Language Models are transforming the scope of scientific research recently. In this talk I will report a few examples of scientific agentization selected from theoretical physics research.

Speaker: HuaXing Zhu (Peking University)

10:55 The AI Landscape in Experimental Particle Physics

Artificial intelligence has revolutionized the analysis of large-scale data in particle physics, significantly enhancing the discovery potential for new fundamental laws of nature. In this talk, I will survey the rapidly evolving role of AI in particle physics, highlighting recent developments and their impact on collider and non-collider experiments. Future prospects towards a large-scale, general-purpose foundation model tailored for particle physics will also be discussed.

Speaker: Prof. Huilin Qu (TDLI, SJTU)

11:20 Leveraging Agentic AI for Global and Systematic New Physics Search

Agentic AI

Speaker: Ke LI (IHEP)

11:45 Quantum artificial intelligence for experimental high-energy physics

Quantum computing applications are an emerging field in high-energy physics. Its ambitious fusion with artificial intelligence may deliver significant efficiency gains over existing methods and/or enable computation from a fundamentally different perspective. The experimental workflow consumes a significant amount of computing resources, and its annual cost will continue to grow exponentially at future colliders. In particular, pattern recognition is one of the most crucial and computationally intensive tasks. In this talk, I will present my work on developing strategies for applying quantum artificial intelligence at high-energy colliders.

Speaker: Hideki (英希) OKAWA (大川) (中国科学院高能物理研究所)

12:10 → 13:30 Lunch

13:30 → 15:35 Plenary 7-3

Convener: 桂军 丁 (University of Science and Technology of China)

13:30 Higgs pair production at the LHC

I will discuss the high-precision theoretical prediction on Higgs pair production at the LHC and the constraint on the Higgs self-coupling.

Speaker: Jian Wang (Shandong University)

13:55 Electroweak Corrections to Higgs boson production and decay

I will talk about our recent work on electroweak corrections to Higgs boson production and decay.

Speaker: 龙斌 陈 (广州大学)

14:20 The puzzles in semileptonic B decays and a possible solution

In this report, I will first introduce the puzzles in semileptonic B meson decays, and then discuss the important role that studies of the fine structure of light hadrons play in addressing this puzzle.

Speaker: Shan Cheng (Hunan University)

14:45 Hypergeometric function representation of Feynman integral

Embed in Grassmannians, we can obtain the analytical hypergeometric function representation of multi-loop Feynman integrals with masses. We can make the classification among those hypergeometric function solutions by geometric configurations, and generalize Gauss relations among the hypergeometric functions to complete analytic continuation of the solutions. This method can be applicable to the high-order corrections of physical quantities.

Speaker: Hai-Bin Zhang (Hebei University)

15:10 Precision Prediction for Higgs Decay into Massive Bottom Quarks

The decay into bottom quarks is the dominant decay channel of a Standard Model Higgs boson. Its precise theory description is crucial for extracting the bottom quark Yukawa coupling and mass from experimental measurements. We report on the status of the first next-to-next-to-next-to QCD calculation in Higgs effective theory retaining the mass dependence of the bottom quark in the final states. After incorporating the newly derived two-loop QCD-EW mxied corrections, we provide the state-of-the-art theoretical prediction for the process of the Higgs decay into massive bottom quarks.

Speaker: Dr Long Chen (Shandong University)

15:35 → 16:00 Coffee Break

16:00 → 18:00 Parallel A-1

Convener: Ying-Ying Li (IHEP)

16:00 New Chiral Structures for BNV Nucleon Decays and Their Applications to ALPs

We examine the most general nucleon decay interactions that involve three light quarks without being acted upon by a derivative. We identify four generic operator structures that correspond to the irreducible representations in the chiral group ${\rm SU(3)}_{\tt L}\otimes {\rm SU(3)}_{\tt R}$ of QCD, {$\pmb{8}_{\tt L}\otimes \pmb{1}_{\tt R}$,$\bar{\pmb{3}}_{\tt L}\otimes \pmb{3}_{\tt R}$,$\pmb{6}_{\tt L}\otimes \pmb{3}_{\tt R}$,$\pmb{10}_{\tt L}\otimes \pmb{1}_{\tt R}$}, plus their chirality partners under the interchange of chiralities ${\tt L}\leftrightarrow {\tt R}$. While half of them have been extensively discussed in the literature, the other half, $\pmb{6}_{\tt L(R)}\otimes \pmb{3}_{\tt R(L)}$ and
$\bar{\pmb{10}}_{\tt L(R)}\otimes \pmb{1}_{\tt R(L)}$, are identified for the first time. We perform chiral matching for these interactions at the leading chiral order and find that each has a unique chiral realization in terms of the octet baryons and pseudoscalars. Notably, the chiral interaction in the $\pmb{6}_{\tt L(R)}\otimes \pmb{3}_{\tt R(L)}$ representation appears at the same chiral order as those of the known ones, while the one in the $\pmb{10}_{\tt L(R)}\otimes \pmb{1}_{\tt R(L)}$ representation appears at a higher chiral order. These new structures are prevalent in effective field theories and UV models, and offer novel experimental avenues to search for baryon number violating nucleon decays. As an application, we investigated the nucleon BNV decays involving a axion-like particle with the general interactions.

Speaker: 昊琳 王 (SCNU)

16:15 Constructing Amplitudes and Theories 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 massivemassless 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. Given
the particle masses, almost all possible vertices, including those involving Goldstone modes, are
uniquely fixed. The only exceptions are triple and quartic scalar self-couplings. In addition, all
particle masses must have the same physical origin. If the number of vector bosons is smaller than
3, the underlying theories for the amplitudes are either massive gauge theories with spontaneous
symmetry breaking (S.S.B.) or Stueckelberg theory. The necessary condition for the latter is that the
scalars have equal masses. We also discuss different models depending on the number of scalars
involved. If the number of vector bosons is larger than 3, the underlying theory must be Yang-Mills
theory with S.S.B. In both Abelian and non-Abelian cases, the specific shape of the Higgs potential
cannot be determined, which explains the fact that scalar self-couplings are undetermined, and the
relations between the masses are generally nonlinear.

Speaker: 俊谋 谌 (暨南大学)

16:30 Probing charged lepton flavor violation induced by dark matter

In this work, for the first time, the constraints on lepton flavor violating (LFV) dark matter (DM) scenarios via the astrophysical photons and positrons, including both the annihilation and decay modes, ${\tt DM(+DM)}\to e^\pm \mu^\mp, e^\pm \tau^\mp, \mu^\pm \tau^\mp$. Given the presence of LFV interactions in various DM models and the challenge of probing such interactions at terrestrial facilities, such as DM direct detection and collider experiments, indirect detection offers a unique approach to investigating them. We utilize the currently available photon datasets from the XMM-Newton, INTEGRAL, and Fermi-LAT telescopes, along with the positron datasets from the AMS-02 satellite, to establish stringent bounds on the relevant annihilation cross sections or decay widths. In particular, we include contributions to the photon spectrum from final state radiation, radiative decays, and inverse Compton scattering. We find that the INTEGRAL (AMS-02) provides the most stringent bound on the annihilation cross sections and decay widths for DM mass below (above) approximately 20 GeV, which are comparable to those of their lepton flavor conserving counterparts.

Speaker: Dr Jinhan(锦汉) Liang(梁) (South China Normal University)

16:45 Quantum Simulation of QCD on the Light Front

Quantum computing is an emerging paradigm in high-energy physics with the potential to overcome fundamental limitations of classical methods. Real-time dynamics, parton structure, and Minkowski-space observables of QCD remain among the hardest problems in modern theory — precisely the regime where quantum simulation offers a natural advantage. In this talk, we present recent progress on quantum simulation of QCD using light-front quantization as a first-principles framework, which enables direct access to real-time scattering processes and hadronic wavefunctions in Fock space. By mapping the light-front Hamiltonian onto quantum circuits and tensor networks, we demonstrate a practical path toward nonperturbative QCD observables on near-term quantum hardware and discuss future directions.

Speaker: Wenyang Qian (Central China Normal University)

17:00 Meson properties and symmetry emergence based on the deep neural network

As a key property of hadrons, the total width is quite difficult to obtain in theory due to the extreme complexity of the strong and electroweak interactions. In this work, a deep neural network model with the Transformer architecture is built to precisely predict meson widths in the range of $10^{-14} \sim 625$\,MeV based on meson quantum numbers and masses. The relative errors of the predictions are $\sim2\%$ in the test data. We present the predicted meson width spectra for the currently discovered states and some theoretically predicted ones. The model is also used as a probe to study the quantum numbers and inner structures for some undetermined states including the exotic states. Notably, this data-driven model is investigated to spontaneously exhibit good charge conjugation symmetry and approximate isospin symmetry consistent with physical principles. The results indicate that the deep neural network can serve as an independent complementary research paradigm to describe and explore the hadron structures and the complicated interactions in particle physics alongside the traditional experimental measurements, theoretical calculations, and lattice simulations.

Speaker: Prof. 强 李 (西北工业大学)

17:15 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 Jingwei Lian (Henan Institute of Science and Technology)

17:30 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)

16:00 → 18:00 Parallel B-1

Convener: 致廷 卢 (南京师范大学)

16:00 Bubble-free first-order phase transitions: dynamics and experimental probes

Speaker: 贇 蒋 (Sun Yat-Sen (Zhongshan) University)

16:15 Simulating sound waves from first-order phase transitions in an expanding universe

When the universe undergoes a slow cosmological first-order phase transition in its early phase, the effects of cosmic expansion must be carefully evaluated. In this Letter, we perform numerical simulations of a relativistic radiation fluid to investigate how cosmic expansion during a slow FOPT alters the generation of gravitational waves. In addition to reducing bubble separations via an effectively increased nucleation rate, intriguingly, cosmic expansion induces a non-linear growth in the GW energy, ultimately leading to a significant enhancement of the gravitational waves for deflagration modes. Owing to their various way to estimate the sound wave lifetime, this enhancement is more pronounced for weak FOPTs than for intermediate FOPTs. This is contrary to previous findings, which suggested a suppression of the GW content. Our results indicate that more detailed investigations are necessary when modeling slow FOPTs.

Speaker: 驰 田 (安徽大学)

16:30 Metastable domain wall in the continuous U(1) group

Domain walls are usually considered within the frameset of the discrete symmetry groups, although such discrete groups might be the remains of some continuous group spontaneously broken in a higher scale. Intuitively, lowering the breaking scale of the continuous group finally results in the disappearance of the domain wall, but how does this happen? Our numerical calculations show this.

Speaker: Yi-Lei Tang (中山大学)

16:45 The story of walls bounded by strings

Walls bounded by strings are a type of hybrid topological defect composed of cosmic strings and domain walls. Such a hybrid defect can appear when a $U(1)$ symmetry is broken into a $Z_n$ symmetry, which is further broken at a later time. The formation of walls affects the dynamic of the pre-existing string network and changes its gravitational wave radiation. We explore the relevant phenomenology in various models and notice that the evolution of the string network can be different from what is described in previous works.

Speaker: Bowen Fu (Northeastern University, Shenyang)

17:00 Dark Matter in Classically Conformal Theories: WIMP and GW-detectable Supercooled Scenarios

Beyond solving the hierarchy problem, classically conformal (CC) theories naturally accommodate dark matter (DM). In this work, we explore the CC $SU(2)_X$ gauge theory with a triplet dark scalar, uncovering three distinct DM scenarios: WIMP and supercooled DM. The production mechanisms are strongly influenced by the CC model's unique first-order phase transition evolution history, which differs significantly from those in non-conformal models. We obtain the viable parameter space for each scenario and investigate the current constraints and future sensitivities at terrestrial experiments and gravitational wave observatories.

Speaker: Cheng-Hao Zhan (Beihang Univ.)

17:15 Cosmological Gravitational Particle Production: Sterile Neutrinos as Dark Matter candidates

In this work we consider cosmological gravitational production of Dirac sterile neutrinos as dark matter candidates during and after inflation. In the former, the Higgs field experiences large quantum fluctuations driving its average field value to the Hubble scale and above facilitating the sterile neutrino production. However, the production efficiency due to classical gravity still remains suppressed compared to the standard freeze-in mechanism. Quantum gravitational effects, on the other hand, are expected to break conformal invariance of the fermion sector by the Planck scale-suppressed operators irrespective of the mass. We find that such operators are very efficient in fermion production immediately after inflation, generating a significant background of stable or long-lived feebly interacting particles. This applies, in particular, to sterile neutrinos which can constitute cold non-thermal dark matter for a wide range of masses, including the keV scale.

Speaker: FOTIS KOUTROULIS (IHEP)

17:30 CP violation in Λb0 decays and electroweak baryogenesis

The recent observation of CP violation in the decay Λb0→ pK-π+π by the LHCb
collaboration, with a significance of 5.2 standard deviations, presents a unique
opportunity to probe physics beyond the Standard Model. While the measured
asymmetry of (2.45 ± 0.46)% is consistent with some hadronic mechanisms within
the Standard Model, its resonant substructure and magnitude suggest potential
contributions from new sources of CP violation. In this work we study the general
two-Higgs doublet model with CP violation in the Yukawa sector and calculate the
contributions to the penguin-dominated four-quark Wilson coefficients entering in
the Λb0 decay. We take into account flavour constraints from $b\to\,s\gamma$
decays, meson oscillations and decays as well as the electron electric dipole moment.
The analysis also incorporates non-perturbative QCD effects through data-driven
dispersive methods for Nπ rescattering amplitudes, minimising theoretical uncertainties
while maximising sensitivity to new physics signatures. Finally, using the vacuum
insertion approximation, we explain the cosmological matter-antimatter asymmetry
through electroweak baryogenesis while simultaneously fitting both the Λb0 and flavour data.

Speaker: Cristian Sierra (TDLI, SJTU)

18:00 → 20:00 Dinner

Monday, 18 May

08:00 → 09:40 Plenary - 11

Convener: Zuowei Liu (Nanjing University)

08:00 SN1987A constraints on hadronically interacting sub-GeV dark matter

We derive conservative model independent limits on the dark-matter–nucleon scattering cross section for sub-GeV dark matter. The leading-order hadronic couplings are most severely constrained by the supernova cooling argument via processes such as nucleon bremsstrahlung and pion–DM conversion. We rule out both spin-independent and spin-dependent cross sections larger than roughly $10^{−50}$ cm$^2$ for DM masses in the MeV to few hundred MeV range, which are several orders of magnitude stronger than existing cosmological and meson decay constraints. This has significant implications for future low-mass direct detection experiments.

Speaker: Yongchao Zhang (Southeast University)

08:25 Dark Color Solution to the Axion Domain Wall Problem

PQ solution to the strong CP problem probably encounters the axion domain wall problem. In this article, we propose a simple and testable solution, asumming that the $U(1)_{\rm PQ}$ possesses mixed anomaly to a hidden $SU(N_c)$ color. Then, the axion field receives a new cosine potential from the hidden instantons, which breaks the $Z_{N_{DW}}$ subgroup explicitly. The new potential lifts the vacua degeneracy, but also drives the effective $\theta$ angle away from the origin, re-incuring the strong CP problem. However, we find that the dark QCD scale $\Lambda_d$ within the 0.1 to 10 MeV window survives.

Speaker: 召丰 康 (N)

08:50 Impact of coherent scattering on relic neutrinos boosted by cosmic rays

Ultra-high-energy cosmic rays (UHECR) scattering off the cosmic relic neutrino background have recently gained renewed interest in the literature. Current data suggest that (UHECR) are predominantly made of heavy nuclei. Similar to the coherent elastic neutrino-nucleus scattering (CE$\nu$NS) observed at low-energy neutrino experiments, the cross section of heavy nucleus scattering off relic neutrinos will be coherently enhanced since the energy of relic neutrinos can reach $\sim O(10)$ MeV in the rest frame of the UHECR. We calculate the diffuse flux of relic neutrinos boosted by UHECR after taking into account the contributions from both coherent and incoherent scatterings. Using current data from IceCube and Pierre Auger Observatory, we place constraints on the overdensity of relic neutrinos down to $\sim 10^8$. Since the flux of boosted relic neutrinos peaks at an energy of $\sim 200\, \text{PeV}$, we also entertain the possibility to explain the recently observed KM3NeT event with boosted relic neutrinos from UHECR.

Speaker: Jiajun Liao (Sun Yat-Sen University)

09:15 Parametric Resonance Production of QCD Axion Dark Matter during the QCD Phase Transition

The cosmological abundance of QCD axions is usually attributed to the misalignment mechanism. We will present a complementary production channel that arises during the QCD phase transition. Primordial temperature fluctuations modulate the axion mass and can trigger parametric resonance in the axion field evolution, exciting modes and enhancing axion production. This effect can significantly modify the predicted axion relic abundance and shift the preferred dark-matter mass range, with implications for ongoing and future axion search experiments.

Speaker: Prof. Yang Qiaoli

09:40 → 10:00 Coffee Break

10:00 → 12:05 Plenary - 12

Convener: Yu Gao

10:00 Linear cosmological evolution of thermal Inelastic Self-Interacting Dark Matter

We preset the linear cosmological evolution of inelastic self-interacting dark matter in a two-component dark sector with a small mass splitting, assuming thermal initial conditions for the two species.
We derive the coupled background and perturbation equations for inelastic conversion between the two species,
considering both power-law and velocity-saturated cross sections.
Exothermic conversion injects kinetic energy into the light component, generating pressure support that suppresses small-scale structure and produces dark acoustic oscillations in the matter power spectrum.
The resulting cutoff at scale $k>1$~Mpc/$h$ depends on the velocity dependence of the cross section,
the mass splitting, and the dark matter mass.
Using linear power spectra computed with a modified Boltzmann solver,
we apply recast constraints from Lyman-$\alpha$ forest data and high-redshift UV luminosity functions,
finding non-monotonic but closed exclusion regions driven by the competition between efficient conversion and rapid depletion of the heavy component.
These results show that the internal thermodynamics of a secluded multi-component dark sector can leave observable imprints on structure formation, providing a complementary probe of dark matter beyond Standard Model interactions.

Speaker: 岳霖 蔡 (紫金山天文台)

10:25 Axion-Like Particles at the Electron-Ion Collider

We explore the searches for axion-like particles (ALPs) at the electron-ion collider (EIC) to be built at the Brookhaven National Laboratory. We propose search strategies with the production of diphoton in both coherent (elastic) and inelastic scatterings. We found the EIC embraces the possibility to extend the existing ALP searches.

Speaker: Keping Xie (Michigan State University)

10:50 Mapping the ALPs: A Naturalness Map for Axions and ALPs

The axion solution to the strong CP problem is only as robust as the Peccei-Quinn symmetry it relies on, and quantum gravity is expected to break it. We quantify the resulting axion quality problem using principled measures of fine-tuning, and show that the cost is severe. For the QCD axion to account for the observed dark matter, Planck-suppressed symmetry-breaking operators must be absent up to mass dimension $d \ge 12$; the naturalness penalty for failing to realize this protection can exceed a Bayes factor of $10^{10}$. Extending the analysis to generic axion-like particles, we map the axion mass-decay constant plane by the degree of UV protection required, and find that large portions of the sensitivity reach of laboratory experiments are already fine-tuned at the part-per-million level or worse. We argue that quality, not mass, is the central naturalness question for the axion program.

Speaker: Andrew Fowlie

11:15 Modulus stabilization of modular flavor models in Jordan frame supergravityization of modular flavor models in Jordan frame supergravity

We propose to discuss the modular flavor model and the stabilization of single modulus field in
the Jordan frame supergravity with non-minimal scalar-curvature coupling of the form Φ(τ, τ ¯)R.
Modular invariance and positivity of the scale factor constrain stringently the form of the frame
function, consequently the Kahler potential. We discuss some general properties of scalar potentials
after the scale transformation from the Jordan frame to the Einstein frame. We find that the shape
of the resulting scalar potential in the Einstein frame is quite different from that of ordinary single
modulus stabilization mechanism. The scalar potential could be stationary at the i∞ fixed point,
leading to a runaway type vacuum. We also discuss numerically the modulus stabilization for some
simplified scenarios.

Speaker: Fei Wang (Department of Physics, ZhengZhou University)

11:40 Gauge and Goldstone bosons from Flavour Symmetries

I will discuss models of fermion masses and mixing based on continuous flavour symmetries, emphasizing the phenomenology of the corresponding gauge bosons and — in the global symmetry case — the (pseudo) Nambu-Goldstone bosons arising from spontaneous symmetry breaking. Beginning with a brief overview of the Froggatt-Nielsen U(1) case, I will then focus on a realistic U(2) model. I will show how searches for the light particles associated with these symmetries — especially in flavour-violating decays of leptons and mesons at current and future experiments — can probe exceptionally weak couplings and, consequently, very high energy scales. The talk will also include a brief discussion on the interplay with other probes of high energies, including gravitational wave observatories.

Speaker: Lorenzo Calibbi (Nankai University)

12:05 → 13:30 Lunch

13:30 → 15:15 Parallel A-2

Convener: 成成 韩 (Sun Yat-sen University)

13:30 Effective Theory for Light Portal Dark Matter Detection

We develop a general framework for the computation of light-portal dark matter direct detection, incorporating a consistent treatment of finite momentum trans- fer. In this framework, dark matter interacts with Standard Model matter through a light mediator, which simultaneously serves as the force carrier for dark matter self-interaction, potentially with a distinct coupling strength. The corresponding effective theory relevant for detecting this class of dark matter is systematically constructed. Our analysis focuses on light (semi)relativistic dark matter, which may originate from cosmic-ray boosting and can be probed in high-threshold experiments such as large-volume neutrino detectors. In this context, the nucleon matrix elements of the effective operators at finite momentum transfer are required, made available through recent advances in lattice QCD and related nonper- turbative methods. The relativistic Fermi gas model is used to convert the nucleon-level momentum transfer to the nuclear level, thereby incorporating nuclear effects pertinent to heavy-target experiments. To demonstrate the utility of the framework, we present ultraviolet-complete examples featuring spin-1 and spin-2 portal dark matter. For these models, we compute the differential cross sections with respect to momentum transfer, adopting parameter choices that address the so-called “core–cusp” problem in astrophysi- cal observations via dark matter self-interactions.

Speaker: Qing Chen (Anhui University of Science and Technology)

13:45 Constraints on light fermionic dark matter via the magnetic dipole-based interaction with 589.3 kg·day data of CDEX-10 experiment

We report the first constraints on the light fermionic dark matter (DM) absorption on nuclear targets via magnetic dipole-based interaction, using the full 589.3 kg·day exposure collected with the CDEX-10 experiment at the China Jinping Underground Laboratory. In this work, we present a newly acquired 139.7 kg·day dataset from the C10A detector. By applying a new time-interval analysis method to suppress clustered noise events, an analysis threshold of 300 eV was achieved for the C10A dataset. Using the combined exposure, we set constraints on the fermionic DM absorption cross section $σ_{\text{NC}}$ at the 10-45 MeV/c2 DM mass region, and on the coupling $e^2U^2$ for dipole-charge interaction with dark photon masses of 100 keV, 100 MeV, and 1 GeV.

Speaker: Mr Peng Zhang (Tsinghua)

14:00 Probing Dark Matter annihilation in the Galactic Centre with TRIDENT

We determine the future sensitivity of the TRIDENT neutrino telescope to dark matter annihilation in the Galactic Centre. By applying the full detector design we show that TRIDENT will probe annihilation rates down to $\langle\sigma v\rangle\approx5\times10^{-27}\,{\rm cm}^3\,{\rm s}^{-1}$ for a $10\,{\rm TeV}$ dark matter, which is below the thermal freeze-out benchmark. The analysis is carried out with all-flavour neutrino interactions, where we demonstrate that cascade events, primarily due to $\nu_{e,\tau}$, show greater sensitivity to a dark matter signal compared to the more commonly studied track events. Furthermore, we highlight the impact of a previously overlooked background, Galactic neutrinos produced from interactions between hadronic cosmic rays and interstellar gas. We find dark matter sensitivities are more strongly degraded in the high energy region above $\sim 10\, {\rm TeV}$, with a maximal weakening of approximately a factor of $\sim 2$. This effect remains smaller than the uncertainty associated with the dark matter density profile but can nonetheless mimic a positive annihilation signal. We contextualize these results with a concrete particle model and show that TRIDENT will be able to probe the most interesting untested parts of parameter space. [To be published in PRD]

Speaker: Xinhui Chu (TDLI, SJTU)

14:15 DREAMuS: Searching for Muon-philic Dark Matter at the High-Intensity Heavy-Ion Accelerator Facility

We propose DREAMuS (Dark matter REsearch with Advanced Muon Source), a new fixed-target experiment at the High-Intensity Heavy-Ion Accelerator Facility (HIAF) in China, dedicated to searching for muon-philic dark matter. Unlike traditional electron-beam experiments, DREAMuS utilizes a GeV-scale muon beam to explore dark sectors that preferentially couple to the second generation of leptons. The experiment specifically targets new gauge bosons (vector or scalar) that mediate flavor-violating interactions and decay into invisible final states.
The search signature consists of a single high-transverse-momentum electron accompanied by significant missing momentum. The DREAMuS detector concept integrates high-precision tracking with advanced time-of-flight (TOF) systems, enabling the robust suppression of irreducible Standard Model backgrounds, such as beam remnant, muon-nuclear scattering, and rare muon decays. Our simulation studies indicate that DREAMuS can achieve competitiv sensitivity to GeV-scale dark matter, particularly in the low-mass region. Furthermore, we demonstrate that the addition of an anti-muon beam configuration significantly enhances the discovery potential in the sub-GeV mass region.

Speaker: Xiang Chen (Shanghai Jiao Tong University)

14:30 MACE实验和新物理探究

MACE实验和新物理探究

Speaker: Shihan Zhao (Sun Yat-Sen University)

14:45 Looking for lights from the darkness

The axion-like particles $a$ can be produced in the Sun via the process of $p + D \to {}^3{\rm He} +a$, with mass up to 5.5 MeV. The photons in the subsequent decay $a \to \gamma\gamma$ can deviate significantly from the Sun, or even from roughly the opposite direction of the Sun. The nontrivial angular and spectral distributions of such photons enable us new methods to detect the {\it lights from the darkness}. In this letter, we consider both the space detection and terrestrial experiments at the South Pole. As a result of the two-body decay and the geometric effects, there exists a critical height for the terrestrial experiments, below which there is no photon for some regions of the parameter space. With the sensitivities of $10^{-16}$ ($10^{-17}$) erg cm$^{-2}$ s$^{-1}$ for the MeV-scale photons in future space and terrestrial experiments, the coupling $g_{a\gamma}$ of $a$ to photons can be probed up to $3\times10^{-12}$ ($1\times10^{-12}$) GeV$^{-1}$, well surpassing the current supernova limits.

Speaker: Yucheng QIU (City University of Hong Kong)

15:00 Freeze-in regime of inelastic DM with electromagnetic form factors

Freeze-in regime of inelastic DM with electromagnetic form factors We investigate the freeze-in production of inelastic dark matter (DM) consisting of two nearly degenerate fermions coupled to the Standard Model through electromagnetic form factors: electric and magnetic dipole moments (dimension 5), and anopole moment and charge radius (dimension 6). We investigate low reheating temperature scenario, and determine the relic density parameter space due to the $\mathrm{SM}+\mathrm{SM} \to f + \bar{f}$ annihilations. We discuss prospects for its detection at terrestrial and astrophysical/cosmological probes. In particular, when the mass splitting is sufficiently small, the excited state is sufficiently long-lived to allow indirect detection signatures due to loop-suppressed decays to photons.

Speaker: Krzysztof Jodlowski (Nanjing Normal U.)

13:30 → 15:15 Parallel B-2

Convener: Minyuan Jiang (Institute of theoretical physics)

13:30 Astrophysical probes & the wave nature of light new physics

Many well-motivated UV theories contain bonsonic light degrees of freedom, which can exhibit various wave-like behaviors at low energy. This leads to many new ideas and novel observables in recent years to probe new physics in astrophysical and laboratory setups alike. In this talk, I will briefly review a few examples in leveraging the wave-like features to test axions and ultralight dark matter. These include the axion-induced supernova remnant radio echo, the soliton-imprinted galaxy rotation curves, axion-induced neutron star X-ray signals. I will end with a new axion-photon resonant conversion mechanism induced by spatially varying magnetic field background and show its phenomenological consequences to the LSTW experiments and solar axion searches.

Speaker: Chen Sun (Tel Aviv University)

13:45 Quantum Tomography of Fermion Pair Production at Future Lepton Colliders: Effects from Beam Polarizations

The intersection of high energy physics and quantum information science has opened new avenues for exploring fundamental physics at high energy colliders. Future lepton colliders, characterized by their clean collision environments and precise beam controls, provide an ideal experimental platform for high energy quantum information measurement. In this talk, we present a comprehensive study of quantum information observables in fermion pair production—specifically top pair production, muon pair production, and Bhabha scattering—which represent the mass threshold behavior, the Z-pole resonance, and the s/t-channel interplay. We will explore how longitudinal beam polarization can serve as a controllable quantum channel to manipulate the two-qubit spin density matrix. Our discussion focuses on three key quantum resources: quantum entanglement, Bell nonlocality, and magic. Our findings highlight that beam polarization is not merely a tool for enhancing statistical precision, but a fundamental knob for probing and controlling quantum resources at the high energy frontier.

Speaker: Yu-Chen Guo (Liaoning Normal University)

14:00 Solving the Stong CP Problem with Heavy Axions Within the Composite Higgs Model Framework

We explore one attractive ultraviolet-violet complete extension of the Standard Model (SM) with the gauge structure $SU(5)\times Sp(2)^\prime\times SU(2)_L \times U(1)_Y^\prime$ that breaks into a technicolor (TC) sector, the QCD and $U(1)_Y$. The TC sector later confines, respecting $SU(4)/Sp(4)$ to yield the SM Higgs boson. The TC confinement and the small instanton of $Sp(2)^\prime$ altogether enhance the axion potential. Eventually, all axions in our model are far heavier than the QCD one and the strong CP problem is automatically solved.

Speaker: Dr Xuhui Jiang (ICTP-AP)

14:15 Two-Step Cosmological Selection: Electroweak Scale and Its Unifying Legacy

The hierarchy problem between the electroweak (EW) scale and the Planck scale remains a central puzzle in modern physics. A promising approach is the cosmological selection via volume-weighted dynamics in a multiverse landscape, where the EW scale is dynamically selected as the configuration that maximizes the vacuum energy. This letter proposes a two-step cosmological selection mechanism. By minimally extending the Standard Model with a complex scalar singlet $\phi$ charged under a new $U(1)$ symmetry, the origin of the EW scale is explained elegantly. If the $U(1)$ symmetry is broken explicitly by soft breaking terms, the framework predicts a viable dark matter candidate. Its abundance can be produced via ultra-relativistic freeze-out during reheating and correlates directly with the reheating temperature.

Speaker: Jinlei Yang (河北大学)

14:30 Precision Higgs Measurements and Light Scalar Searches with Particle-Level Transformers

Future Higgs factories provide a clean experimental environment and large Higgs samples, offering a unique opportunity for both precision Higgs measurements and direct searches for additional scalar states. In this talk, I will present a particle-level analysis strategy for Higgs physics based on the More-Interaction Particle Transformer (MIParT), which aims to maximize the use of reconstructed final-state information. I will first discuss its application to hadronic Higgs measurements in $e^+e^- \to ZH$ at $\sqrt{s}=240~\mathrm{GeV}$, where improved jet-flavor discrimination leads to projected precisions of $0.18\%$, $1.07\%$, and $0.52\%$ for $H\to b\bar b$, $H\to c\bar c$, and $H\to gg$, respectively, in the $Z\to \nu\bar{\nu}$ channel, together with sensitivity to $H\to s\bar s$. I will then present its application to the search for a light scalar around $95~\mathrm{GeV}$ in $e^+e^- \to ZS$, focusing on the $S\to \tau^+\tau^-$ and $S\to b\bar b$ final states. Relative to conventional cut-based analyses, the particle-level approach improves the expected statistical precision by factors of about $2.4$ and $1.4$ in the two channels, respectively. These results show that particle-level deep learning can strengthen both the precision and discovery frontiers of Higgs physics.

Speaker: Kun Wang (University of Shanghai for Science and Technology)

14:45 Model Building with Non-Invertible Selection Rules: Two Examples in Lepton Physics

Non-invertible symmetries have recently provided new possibilities for particle-physics model building. In this talk, I will discuss two examples based on non-invertible selection rules in lepton physics. The first is a radiative lepton model based on the Ising fusion rule, where the charged-lepton mass hierarchy is partially generated through one-loop dynamical symmetry breaking, while neutrino masses, a viable dark matter candidate, and the muon g−2 can be addressed within the same framework. The second is a loop-induced neutrino-mass model based on the Fibonacci fusion rule, where a small induced vacuum expectation value arises radiatively in the presence of higher electroweak multiplets, and the effective cut-off scale is tied to the renormalization-group behavior of the SU(2)_L gauge coupling. These examples are intended to show how non-invertible symmetry may provide a useful organizing principle for constructing viable models of lepton masses and related new-physics phenomena.

Speaker: 佳骏 吴 (University of Chinese Academy of Sciences)

15:15 → 15:40 Coffee Break

15:40 → 17:45 Plenary - 13

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

15:40 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. 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: Dr Ran Ding

16:05 Graph Path Likelihood for Galaxy Formation on Layered Halo Graphs

Likelihood-based forward modeling is standard in galaxy formation, but most implementations are formulated as forward maps rather than explicit trajectory-level likelihoods conditioned jointly on assembly history and environment. We introduce a Graph Path Likelihood Model (GPLM) on layered halo graphs, where temporal edges encode causal transport and coeval host edges encode environmental conditioning. On a fixed layered graph, the graph-conditioned path measure is written as $P(\mathbf{x}\mid G)\propto p_{\rm attach}(\mathbf{x}\mid G)\exp[-S(\mathbf{x}; G)]$, where $S$ is an effective action for dynamical increments, currently implemented as a Gaussian Onsager-Machlup term, and $p_{\rm attach}$ is a boundary measure for node entry. We also discuss a minimal preferential attachment-detachment prescription for the graph probability $P(G)$, which facilitates placing the likelihood within a cosmological ensemble of layered graphs. Trained on layered graphs reconstructed from TNG50-1, GPLM improves stellar- and gas-mass predictions over transport-only baselines. As fixed-graph applications, we evaluate dark-matter-deficient-galaxy operator averages, compute gas-channel response under controlled deformations, and compare full and host-ablated path measures through likelihood-ratio diagnostics. In these examples, higher-order satellites show a higher incidence of dark-matter deficiency and broader graph-to-graph variation, while the gas-rich response indicates more diverse environmental processing histories. GPLM thus provides a bridge between astrophysical forward modeling, stochastic effective actions on structured histories, and path-integral diagnostics of environment-dependent galaxy evolution.

Speaker: Daneng Yang (school of physics Peking Uniersity)

16:30 Same-sign dimuon probe of charged lepton flavor violation at electron–photon colliders

Observation of charged lepton flavor violation would constitute unambiguous evidence for physics beyond the Standard Model (SM). We identify a previously unexplored same-sign dimuon signature in electron--photon collisions, $\gamma e^- \to e^+\mu^-\mu^-$, mediated by an axionlike particle (ALP) with flavor-violating $e$--$\mu$ couplings. The absence of irreducible SM backgrounds and the on-shell production of the ALP render this channel intrinsically clean and highly sensitive, with only small residual backgrounds arising from detector effects. Such collisions can be realized via laser Compton backscattering at $e^+e^-$ colliders including BEPC-II with the BESIII detector, STCF, and ILC. We find that STCF and ILC can probe couplings one to two orders of magnitude below existing bounds. This combination of resonant production, vanishing irreducible background, and same-sign topology would be difficult to achieve in conventional $e^+e^-$ or hadron-collider environments, establishing electron--photon collisions as a uniquely powerful probe of charged lepton flavor violation.

Speaker: Zeren Simon (泽人) Wang (王) (Hefei University of Technology)

16:55 Long-lived particle searches at FASER and future machines

In this work we study the prospect of detecting light scalars at the FASER, Mathusla codex-B etc. We develop the general formalism for the scalar production and decay from mesons with PP collision, given modified couplings of the scalars to the SM particles, as well as summarizing the relevant GeV-scale experiment constraints. We then analyze the reaches of light scalars in the large tan𝛽 region of the Type-I 2HDM, in which a light scalar with relatively long lifetime could be accommodated. We also have studies in the SUSY framework.

Speaker: Wei Su (Sun Yat-Sen University)

17:20 Connecting Leptogenesis with Observable Gravitational Waves

The Connection between Leptogenesis with GW

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

18:00 → 20:00 Dinner

Tuesday, 19 May

08:00 → 20:00 Departure