The 29th International Workshop on Weak Interactions and Neutrinos

2 Jul 2023, 08:00 → 8 Jul 2023, 18:00 Asia/Shanghai

Room C203, Haiqin Building #6 (Sun Yat-sen University Zhuhai Campus)

Wei Wang (Sun Yat-sen University)

The International Workshops on Weak Interactions and Neutrinos have been organized regularly for the past 50 years at venues in Africa, Asia, Europe, and Latin and North America. The 29th edition (WIN2023) is coming to you on July 3-8, 2023, at Sun Yat-sen University (SYSU) in Zhuhai, China. This conference will be held offline and there will be no online conference room available.

The workshop aims to provide a forum for researchers from around the world to exchange the latest developments and progress in the field of weak interactions and neutrinos. The event will include a variety of invited and contributed papers, poster presentations, and workshops.

The program allows ample time for formal and informal discussions in the five working groups:

– Neutrino Physics

– Electroweak Interactions

– Flavor and Precision Physics

– Astro-particle Physics and Cosmology

– Applications of Nuclear Technology

This workshop is hosted by SYSU, organized by the Sino-French Institute of Nuclear Engineering and Technology (IFCEN) of SYSU, and co-organized by the Institute of Advanced Science Facilities, Shenzhen (IASF). We cordially invite all researchers, faculty members, students, and industry professionals working on the subject and related fields to participate in this workshop.

Welcome to Zhuhai

Zhuhai, located in the south-central part of Guangdong Province, is one of the special economic zones in China. It is the only city in Mainland China that is connected to both Hong Kong and Macao by land upon the completion of the Hong Kong-Zhuhai-Macao Bridge. With intertwining mountains, rivers, and many islands, Zhuhai is the only city in the country that has been nominated as one of the "Top 40 National Tourist Attractions" for its overall urban landscape. Zhuhai has a first-class living environment and received the "Dubai International Award for Best Practices to Improve the Living Environment" from the United Nations Human Settlements Programme. Zhuhai is committed to developing itself into a new economic engine and a fascinating city with distinctive characteristics for the Greater Bay Area. --Cited from the Great Bay Area Official Website.

About SYSU

SYSU is one of the leading universities in China, which has five campuses in three major cities, Guangzhou, Shenzhen, and Zhuhai, where all located in the pan-pearl-delta area (now renamed the Greater Bay Area, including Hong Kong and Macao). They are within driving distance of all the international airports in Guangzhou, Shenzhen, and Hong Kong. The university is committed to staying open to the world and supporting both fundamental and applied research that is believed eventually benefit the world.

About IFCEN

IFCEN is the nuclear engineering department of SYSU, established in September 2010 in Zhuhai. The institute recruits over 100 students annually, who follow a six-year program in nuclear engineering and obtain a Master's degree recognized in France and Europe as equivalent to the engineering diploma delivered by French schools of engineering. Thanks to the support of its industrial partners (CGN, Areva, EDF, Bureau Veritas), IFCEN trains highly skilled engineers who can become leaders in their field.

About IASF

The Institute of Advanced Science Facilities, Shenzhen (IASF) is a multi-disciplinary research institute responsible for Shenzhen’s large-scale science facilities' whole life cycle planning, construction, operation, and maintenance. At the primary phase, there are two active infrastructure projects are being funded; one is a diffraction-limited synchrotron radiation facility, and the other one is a high repetition rate soft X-ray super-conducting free-electron laser facility.

We invite you to register at your earliest convenience through https://indico.ihep.ac.cn/e/win2023 and submit a presentation and/or poster abstract on any topic relevant to the program of this workshop. For more information on travel and accommodation, please refer to https://ifcen.sysu.edu.cn/win2023.

If you need an invitation letter, please click here and fill in the Word document of the 3rd option and send it to win2023@mail.sysu.edu.cn. We will then prepare an invitation letter for you to support your visa application.

Please feel free to contact us for more information at win2023@mail.sysu.edu.cn.

We are looking forward to seeing you in Zhuhai!

Best regards,

Wei Wang, Professor of Physics and Nuclear Science & Technology

Dean of Sino-French Institute of Nuclear Engineering and Technology

On behalf of the WIN2023 Local Organizing Committee

Certificate of Attendance 600dpi.pdf

conference handbook V1max.pdf

conference handbook（WIN2023）--20230701.pdf

Guidelines for registering an Indico account and submitting a summary for the conference report.pdf

Payment Instructions for WIN2023 (In English).pdf

qrcode.jpg

Reminder letter (20230606).pdf

Reminder letter (20230620).pdf

Reminder letter (20230620).pdf

Reminder letter (20230701).pdf

Reminder letter for early arrive and poseter.pdf

WIN2023 Bulletin.pdf

win2023-poster.jpg

WIN2023 Poster.pdf

WIN2023 中文会议通知.pdf

注册费缴费指引.pdf

Sunday, 2 July

14:00 → 18:00 Registration

18:00 → 21:00 Reception

18:00 → 20:00 Registration

18:00 WIN 2023 technical support

WIN 2023 technical support

Speakers: Dr Jun Wang (Sun Yat-sen University) , Yi Sima (SAA)

Monday, 3 July

08:00 → 08:30 Registration

08:30 → 09:00 Welcome

Convener: Prof. Wei Wang (Sun Yat-Sen University)

08:30 Welcome

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

Welcome + SYSU INTRO + IFCEN 20230703.pdf

09:00 → 10:20 Overview talks 1:

Convener: Prof. Wei Wang (Sun Yat-Sen University)

09:00 Overview of the future directions of particle physics (remote)

Speaker: Liantao Wang (University of Chicago)

WIN2023--liantao wang.pdf

09:40 Neutrino Physics: Experiment (remote)

Speaker: Prof. Karsten Heeger

Heeger-WIN2023-nuexp.pdf

10:20 → 10:30 Sponsor talk 1: Dual Rainbow Tech (10 min)

Speaker: Dual Rainbow

DUALRAINBOW-0630-V3.2.pdf

DUALRAINBOW-0630-V3.2.pptx

10:30 → 11:00 Group photo & Coffee break

11:00 → 11:40 Overview talk 2:

Convener: Jiajie Ling (Sun Yat-sen University (中山大学))

11:00 Neutrino Physics: Theory

Speaker: Shun Zhou (高能所)

WIN2023-ZHOU.pptx

11:40 → 12:20 Highlight talk 1

Convener: Jiajie Ling (Sun Yat-sen University (中山大学))

11:40 Status and prospects of JUNO

Speaker: Yee Bob Hsiung (Department of Physics National Taiwan University)

WIN2023_JUNO_YeeBobHsiung_v2.pdf

12:20 → 14:00 Lunch

14:00 → 15:20 Overview talks 3: Flavour & Precision Physics

Convener: Liang Sun (Wuhan University)

14:00 Flavor and Precision Physics: Theory

Speaker: Prof. Xiao-Gang He (SJTU/NCTS)

Flavor-physics-2023.pdf

14:40 Flavor and Precision Physics: Experiment

This talk, as an experimental flavour overview presentation, will cover the latest results from the LHCb/Belle-II/ATLAS/CMS/BESIII/g-2/mu2e/COMET experiments.

Speaker: Prof. Hang Yin (Central China Normal University)

FlavourAndPrecision.pdf

15:20 → 15:30 Sponsor talk 2: NNVT (10 min)

Speaker: NNVT

NNV-PMT-20230703-WIN2023-update1.pdf

15:30 → 16:30 Poster session & Coffee break

15:30 A hard X-ray nanoprobe beamline at Shenzhen Innovation Lightsource Facility

Hard X-ray nanoprobe is a key technology in the application of synchrotron radiation lightsource, especially for 4th generation lightsource. Here we report our new design of Hard X-ray nanoprobe beamline in Shenzhen Innovation Lightsource Facility (SILF). In this 150m long beamline, two-stage focusing method is adopted to offer great control over flux, coherence length and focused spot size. Two experimental stations with different focusing elements are designed to alternate ultimate spot size, flux and workspace. With the primary simulation, a spot size of a sub-30nm is acquired with zone plate focusing and ~70nm with K-B mirror. Furthermore, the station with K-B mirror can also provide 60mm workspace and ~1×1011 photons/s flux.

Speaker: Yan Zhang

15:30 Complete one-loop renormalization-group equations in the seesaw effective field theories

In this talk, we derive the complete set of one-loop renormalization-group equations (RGEs) for the operators up to dimension-six (dim-6) in the seesaw effective field theories (SEFTs). Two kinds of contributions to those RGEs are identified, one from double insertions of the dimension-five (dim-5) Weinberg operator and the other from single insertions of the tree-level dim-6 operators in the SEFTs. A number of new results are presented. First, as the dim-5 Weinberg operator is unique in the standard model effective field theory (SMEFT), its contributions to the RGEs for the SEFTs are equally applicable to the SMEFT. We find the full contributions from the Weinberg operator to one-loop RGEs in the SMEFT, correcting the results existing in previous works, and confirm that those from dim-6 operators are consistent with the results in the literature. Second, in the type-I SEFT, we give the explicit expressions of the RGEs of all the physical parameters involved in the charged- and neutral-current interactions of leptons. Third, the RGEs are numerically solved to illustrate the running behaviors of the non-unitary parameters, mixing angles and CP-violating phases in the non-unitary leptonic flavor mixing matrix. Together with the one-loop matching results of
the dim-5 and dim-6 operators and their Wilson coefficients, the present work has established a self-consistent framework up to dim-6 to investigate low-energy phenomena of three types of seesaw models at the one-loop level.

Speaker: 艺霖 王 (高能所)

WIN2023-poster-2.0.pdf

15:30 Cosmic-ray muon reconstruction with meachine learning methods at JUNO

The Jiangmen Underground Neutrino Observatory (JUNO) is a next-generation large (20 kton) liquid-scintillator neutrino detector, which is designed to determine the neutrino mass ordering from its precise reactor neutrino energy spectrum measurement. For reactor antineutrino detection, it is necessary to precisely eliminate cosmogenic backgrounds like 9Li/8He and fast neutrons that are generated by cosmic muons. This can be achieved by applying muon veto cuts, where accurate muon track and shower vertex reconstruction could largely increase the effective detection volume of JUNO’s central detector. This poster presents a machine learning approach for the track and shower vertex reconstruction for single muon events. This approach shows promising reconstruction performance based on the Monte Carlo simulations.

Speaker: Jiaxi Liu (ihep)

Cosmic-ray muon reconstruction with machine learning methods at JUNO.pdf

15:30 Data Quality Monitoring for the JUNO Experiment

In High Energy Physics (HEP) experiment, Data Quality Monitoring (DQM) system is crucial to ensure the correct and smooth operation of the experimental apparatus during data taking. DQM at Jiangmen Underground Neutrino Observatory (JUNO) will reconstruct raw data directly from JUNO Data Acquisition (DAQ) system and use event visualization tools to show the detector performance for high quality data taking. The strategy of the JUNO DQM, as well as its design and performance will be presented.

Speaker: Kaixuan Huang (Sun Yat-Sen University)

DQM_WIN2023_poster_v3.pdf

15:30 Denoising Signals from a High-Purity Germanium Detector using Generative Adversarial Networks with Convolutional Autoencoders

High-purity germanium detectors are used in the search for rare events such as neutrinoless
double-beta decay, dark matter and other beyond Standard Model physic. Due to the
infrequent occurrence of signal events, extraordinary measures are taken to reduce background
interactons and extract the most informatio from data. An efficiensignal denoising algorithm
can improve energy resolutio and background rejectio techniques, and help classify signal
events. It can also help identify lo-energy events where the signal-to-noise ratio is smal.
In this work, we demonstrate the applicatio of generative adversarial networks withdeep
convolutional autoencodes to remove electronic noise from high-purity germanium p-type
point contact detector signals. Built on the success of denoising using a convolutional
autoencoder, we investgate generative adversarial network applied on autoencoders to
further improve denoising and enable more realisticmodel training condition. This includes
training with unpaired simulation and realdata, as well as training with only real detector data
without the need of simulatio. Our approach is not limited to high-purity germanium
detectors; it is broadly applicable to other detector technologies in the particle astrophysics
community and beyond.

Speaker: Ms Tianai Ye (Queen's University (Canada))

WIN2023_abstract.pdf

15:30 Design of the JUNO Offline Geometry and Identifier System

In JUNO experiment, geometry is designed to precisely describe the detector details and to provide consistent detector information for all applications. The Identifier provides a unique identification number for every unit with readout, and is used by different applications in offline software. An ID mapping service is under development to provide correlations between different ID systems(Offline, DAQ, OEC, Electronics, Commissioning…).

Speaker: Chengxin Wu

abstract.pdf

15:30 Environmental radioactive background control at JUNO

The Jiangmen Underground Neutrino Observatory (JUNO) is a 20 kt liquid scintillator detector under construction 700 m underground. It will enable studies of various neutrino physics topics, and the level of radioactive background is an essential factor in achieving the desired sensitivities. The raw materials of the JUNO detector have already been screened and met the radio purity requirements. At present, the detector is being installed in the underground experimental hall, and during these operations the radioactive control on the environment is very important. The whole underground space at JUNO site has a volume of about 300,000 m$^{3}$, including the main hall of 120,000 m$^{3}$ and a number of attached halls and tunnels, such as the liquid scintillator room and the liquid scintillator filling room, making it the largest underground laboratory in the world. As in every underground laboratory, the rocks and water will release large amounts of $^{222}$Rn into the air. The detector components have the risk of air exposure during the installation, so radon and its daughters can attach to their surfaces. This is particularly critical for materials that need to enter into contact with the liquid scintillator, since the radioactive contaminants could diffuse into the liquid and mimic the physics signals. Therefore, the control of radon concentration in the experimental hall is a critical issue. Moreover, dust in the air is rich in $^{238}$U, $^{232}$Th, $^{40}$K, so the residual dust is another source of radioactive background. The cleanliness inside the experimental hall should reach the level of Class 100,000 or better. In order to achieve an installation environment with a low radon concentration and cleanliness level, a lot of effort was put in the optimization of the ventilation system in the experimental hall. Additionally, the sources of radon in the underground air have been carefully studied. The radon concentration in the experimental hall could be stabilized at about 100 Bq/m3 after great efforts. Both the radon and the cleanliness level have now met the requirements.

Speaker: 晨阳 崔 (高能所)

poster.pdf

15:30 Exploring Self-Interacting Dark Radiations in the Context of the Hubble Tension

In this study, we investigate the scenario when dark radiations, i.e., sterile neutrinos, interact with a heavy scalar field (SIdr). We utilize cosmic microwave background (CMB) data from the Planck experiment to constrain the SIdr model and address the Hubble tension issue. We verify our results using Atacama Cosmology Telescope (ACT) and South Pole Telescope (SPT) data. Our theoretical analysis reveals that in the absence of explicitly incorporating additional neutrino species $N_{\rm eff}=3.02\pm0.27$, a modified Hubble constant $H_0=69.3\pm2.0$ naturally emerges when all dark radiations are tightly coupled.
However, within a $3\sigma$ confidence level (corresponding to a 99.7\% probability), an upbound value of $H_0<72.9$ is predicted.

The predictions align well with all the datasets, leading to an increase in the Hubble constant to $H_0=70.1\pm1.3$ in the strong self-interacting region $\log_{10}G_{\rm eff}=-1.80_{-0.08}^{0.13}$. Moreover, $N_{\rm eff}=3.23\pm0.25$ is consistent with the Planck results. The SIdr tends to favor the matter clustering as indicated by $S_8=0.832\pm0.011$, which is a combined effect of a decrease in $\Omega_m$ and an increase in $H_0$. Furthermore, the amplitude $A_s$ and the spectrum index $n_s$ are reduced to $\log(10^{10}A_s)=2.978\pm0.016$ and $n_s=0.9327\pm0.0064$ respectively, due to the effects implemented by self-interacting radiation. However, in the weak self-interacting region $\log_{10}G_{\rm eff}=-4.15_{-0.83}^{0.55}$, these parameters remain consistent with the Planck value.

Finally, we employ a Fisher forecast analysis to predict future constraints on the SIdr model. CMB-S4 experiment alone will improve the coupling strength $\log_{10}G_{\rm eff}$ upto $2.7$ times. Additionally, both AliCPT and Planck experiments enhance coupling strength upto $3.5$ times, considering $f_{\rm sky}=0.4$ for AliCPT.

Speaker: 志宇 陆 (中国科学技术大学)

15:30 Features Analysis of Particle Tracks and Sensitivity Estimation in PandaX-III Experiment

The study of Majorana neutrinos is a hot research topic in the field of particle physics for exploring physics beyond the Standard Model. Neutrinoless double beta decay (NLDBD) is a rare nuclear decay process that can confirm the Majorana nature of neutrinos experimentally. The PandaX-III collaboration aims to build a globally competitive experiment with a hundred-kilogram target mass, utilizing a high-pressure xenon gaseous time projection chamber based on Micromegas to search for the NLDBD process of $^{136}Xe$. Its significant advantage lies in the ability to discriminate signals from the background through the characteristic of charged particle tracks, thereby greatly improving the experimental sensitivity to NLDBD. This work focuses on the analysis of charged particle track features in the PandaX-III experiment and introduce methods such as particle track reconstruction and event vertex reconstruction to advance PandaX-III towards a zero-background experimental condition.

Speaker: 涛 李 (Sun Yat-Sen (Zhongshan) University)

Features Analysis of Particle Tracks and Sensitivity Estimation in PandaX-III Experiment-LiTao.pdf

15:30 High-Resolution Hard X-ray Spectroscopy Beamline Designed at Shenzhen Innovation Light-source Facility (SILF)

Shenzhen Innovation Light-source Facility (SILF) is a newly proposed fourth-generation synchrotron light source in China. In the first phase, a high-flux undulator beamline for high-resolution hard X-ray spectroscopy and hard X-ray photoelectron spectroscopy, named as High-Resolution Hard X-ray Spectroscopy Beamline, will be designed and constructed. This beamline is equipped with a double-crystal monochromator, a high harmonics suppression mirror and Kirkpatrick–Baez mirror pairs, providing 3.4-18 keV hard X-ray with a focused spot size of 15μm2. It will be dedicated to high energy resolution fluorescence detected X-ray absorption spectroscopy (HERFD-XAS), X-ray Emission Spectroscopy (XES), resonant inelastic X-ray scattering (RIXS) and hard X-ray photoelectron spectroscopy (HAXPES) measurements for advanced research and industrial innovations.

Speaker: Dr Tianhui Liu (Institute of Advanced Science Facilities, Shenzhen, China)

WIN23 poster-Tianhui Liu.pdf

15:30 Introduction of the Service Evaluation Beamline in SILF, IASF

Beamline Service Evaluation is a designed high energy X-ray beamline of SILF for imaging, diffraction and scattering, which will operate at energies of 30-100 keV. This beamline is designed to be suitable for experiments, which utilize: high-energy X-rays, time-resolved in situ measurements, monochromatic or polychromatic (“white beam”) X-rays imaging and diffraction techniques, including their combination during one experiment. This beamline is designed not only for academic research but also for industrial oriented experiments.

Speaker: Ziling Peng ( IASF)

海报_彭子菱 20230619.pdf

15:30 Invariant Theory and Leptonic CP Violation

The invariant theory provides a systematic method to construct quantities that are invariant under group action in terms of model parameters. So far, it has a lot of applications in particle physics. In this talk, I will introduce the basic ingredients of invariant theory and Hilbert series. The application of invariant theory in neutrino physics, and particularly in describing leptonic CP violation, will be discussed.

Speaker: Dr Bingrong Yu (Institute of High Energy Physics (IHEP))

Yu_poster_win2023.pdf

15:30 Investigating the Impact of the Intermediate Water Cherenkov Detector on the Hyper-Kamiokande Neutrino Oscillation Measurements

Hyper-Kamiokande (HK) is a next-generation long-baseline neutrino experiment that aims to take data in 2027. The experiment will use the J-PARC neutrino beam, upgraded to 1.3 MW, followed by a suite of near detectors. The HK far detector is a 260 kt underground water Cherenkov detector, placed 2.5-degree off the central axis of the neutrino beam and 295 km from the target. The experiment is designed to search for charge-parity (CP) violation and measure the neutrino oscillation parameters precisely. Observing CP violation at 5 sigma significance for a large fraction of dCP will require the systematic uncertainties on the neutrino interaction model to be significantly reduced compared to available constraints from the available data of neutrino-nucleus interactions.

The Intermediate Water Cherenkov Detector (IWCD) is a proposed near detector for HK located approximately 1 km from the beam production target. The IWCD will move vertically between 1-4 degrees off the neutrino beam axis. The large detector volume with excellent electron identification power will provide high statistics electron neutrino and antineutrino samples. The off-axis fluxes will provide muon neutrino samples with energy spectra peaked at different energies, resulting in different dominated types of neutrino interaction to allow better constraints on the cross-section uncertainties. The poster will present how the predicted results from IWCD are implemented into the HK neutrino oscillation analysis and the corresponding sensitivity studies carried out on the oscillation parameters.

Speaker: Tailin Zhu (Imperial College London)

15:30 Machine learning applications for atmospheric neutrinos in JUNO

The Jiangmen Underground Neutrino Observatory (JUNO) aims to determine the neutrino mass ordering at $3 \sigma$ level within six years of taking. To enhance its sensitivity, JUNO will be able to combine reactor and atmospheric neutrino data. The sensitivity from the atmospheric neutrino measurement depends on the performance of the event reconstruction (energy and zenith angle) and the capability to separate the neutrino flavor and neutrinos from anti-neutrinos. However, these tasks pose significant challenges for large unsegmented liquid scintillator detectors like JUNO. This poster presents a multi-purpose machine learning method for atmospheric neutrinos to reconstruct the neutrino directionality, energy, and vertex, as well as identify neutrino flavors. Preliminary results based on Monte Carlo simulations show promising potential for this approach.

Speaker: Zhen Liu (IHEP)

ZhenLIU_Machine learning applications for atmospheric neutrinos in JUNO.pdf

15:30 Matter Effects In Neutrino Chiral Oscillation

Due to finite masses and mixing, for neutrinos propagate in space-time, there is a transition between left- and right- handed neutrinos, termed chiral rotation, besides the usual oscillation governed by the Dirac equation. The probability of chiral rotation is suppressed by a factor $m^2/E^2$. For non-relativistic neutrinos, this effects can be significant. In matter, the equation of motion is modified. This changes the behaviors of the oscillations. Neutrinos produced in weak interaction after passing through the matter, the effective energies are split into two different ones depending on the helicity of the neutrino. This results in different oscillation behavior for neutrinos with different helicity, in particular there is a resonant effect for the left-handed neutrino of negative helicity into right-handed neutrino of negative helicity. These effects will have important consequences in the early universe.

Speaker: Ming-Wei Li (Shanghai Jiao Tong University)

chiral.pdf

15:30 Neutrino Magnetic Moments Meet Precision $N_{\rm eff}$ Measurements

In the early universe, Dirac neutrino magnetic moments due to their chirality-flipping nature could lead to thermal production of right-handed neutrinos, which would make a significant contribution to the effective neutrino number, Neff . In this talk, I will show that the neutrino magnetic moments above $2.7\times 10^{-12}\mu_B$ have been excluded by current CMB and BBN measurements of $N_{\rm eff}$. This limit is stronger than the latest bounds from XENONnT and LUX-ZEPLIN experiments and comparable with those from stellar cooling considerations.

Speaker: Shaoping Li (IHEP)

WIN2023_Poster_LiSP.pdf

15:30 Physical design and performance of Additive Manufacturing Beam Line@SILF

深圳产业光源增材制造线站采用波荡器（Undulator）光源，利用其高亮度、小发射度的特点获得高通量密度的同步辐射光。光源采用18mm短周期波荡器利于实现高次谐波的引出，从而覆盖8~30keV的能量波段；通过的超长线设计，以实现样品点处毫米级光斑尺寸；光束线中设置有双平晶单色器（DCM）可以提供高能量分辨的单色光，从而为高质量的定量CT测量提供可能。深圳产业光源增材制造线站高速X射线成像及CT成像为主要研究方法，将服务于粤港澳地区的增材制造相关产业中的凝固机理、成型控制、成型性能评估等基础科学及应用基础问题，助力传统制造业从低端模仿向高端创新创造转型，为其向先进制造和智能制造进行产业升级提供技术支撑。

Speaker: Fangke Zong (Institute of Advanced Scientific Facilities ，Shenzhen)

15:30 Radioactivity measurements of 238U/232Th for JUNO acrylic and LAB by ICP-MS

The Jiangmen Underground Neutrino Observatory (JUNO) is a multi-purpose neutrino experiment that was proposed primarily to determine neutrino mass ordering. The center detector is a 35.4m diameter spherical acrylic vessel containing 20 kton low background Liquid Scintillator (LS). The radioactive requirements are 10-12g/g and 10-17g/g of 238U/232Th for JUNO acrylic and LS, respectively.
The accurate measurement of 232Th/238U in acrylic and LAB, which is the main component of LS, is significant for JUNO. To improve the detection sensitivity of ICP-MS, we developed two different pretreatment techniques for acrylic and LAB. For acrylic, the pretreatment is dry ashing with a microwave muffle furnace. For LAB, the pretreatments are distillation then acid extraction or ashing. Combining the pretreatment techniques and ICP-MS, we improved the sensitivity of 238U/232Th measurement in acrylic to 10-13 g/g, and the preliminary results show that the upper limit of 238U/232Th in LAB can reach 10-16 g/g. The 238U/232Th measurements played an important role in the mass production, surface treatment procedure optimization of JUNO acrylic as well as several LAB samples screening before and after JUNO LS purification systems. In this poster, the detail of 238U/232Th measurement approaches and screening results will be presented.

Speaker: 李院霞 LI Yuanxia (高能所)

15:30 Search for charged lepton flavor violating decay J/psi -> emu

We present a search for the lepton flavor violating decay 𝐽/𝜓→𝑒𝜇 using 8.998×10^9 𝐽/𝜓 events collected with the BESIII detector at the BEPCII 𝑒+ 𝑒− storage ring. No excess of signal above background is observed; we therefore set an upper limit on the branching fraction of ℬ(𝐽/𝜓→𝑒𝜇)< 4.5×10^(−9) at the 90% confidence level. Improving the previous best result by a factor of more than 30, this measurement places the most stringent limit to date on lepton flavor violation in the heavy quarkonium sector.

Speaker: Jingshu Li (Sun Yat-Sen (Zhongshan) University)

15:30 Search for the semi-muonic weak decay 𝐽/𝜓→𝐷−𝜇+𝜈𝜇

Charmonium weak decay is allowed in the Standard Model but has never been observed. Using (10087±44)×106 𝐽/𝜓 events collected with the BESIII detector at the BEPCII 𝑒+𝑒− storage ring at the center-of-mass energy of √𝑠=3.097 GeV, we present a search for the charmonium rare semi-muonic decay 𝐽/𝜓→𝐷−𝜇+𝜈𝜇 and its charge conjugation (c.c.) mode. Since no significant signal above the background is observed, we set an upper limit of the branching fraction to be BF(𝐽/𝜓→𝐷−𝜇+𝜈𝜇+𝑐.𝑐.)<5.6×10−7 at a confidence level of 90%. This is the first search for the weak decay of charmonium with a muon in the final state and the measurement is compatible with the SM theoretical predictions.

Speaker: Zhijun Li (Sun Yat-Sen University)

15:30 Status of the small PMT system in JUNO

25600 3-inch PMTs (SPMTs) were designed in the JUNO detector together with 20012 20-inch PMTs (LPMTs). The SPMT system can enhance the detector’s performances such as calibrating charge nonlinearity of LPMTs and thus improving the energy resolution. Signals of SPMTs are read out by the frontend electronics contained in 200 underwater boxes through 1600 customized multichannel connectors. All of SPMTs and electronics have been produced, integrated and tested. 5% of them have been installed in the 700-m underground JUNO detector and verified with a dedicated light-off test. In this poster, we will report the design of the SPMT system, mass production and performances of SPMTs and electronics, as well as the latest progress of SPMT installation and commissioning.

Speaker: Ziliang Chu

Abstract Status of the small PMT system in JUNO.pdf

Status of the small PMT system in JUNO_v5.pdf

15:30 The MSW matter potential at the one-loop level in the Standard Model

When neutrinos are propagating in ordinary matter, their coherent forward scattering off background particles results in the so-called Mikheyev-Smirnov-Wolfenstein (MSW) matter potential, which plays an important role in neutrino flavor conversions. In this talk, I will show a complete one-loop calculation of the MSW matter potential in the Standard Model (SM). We carry out the one-loop renormalization of the SM in the on-shell scheme. The finite corrections to the scattering amplitudes of neutrinos with the electrons and quarks are calculated, and the one-loop MSW matter potentials are derived. Adopting the latest values of all physical parameters, we find that the relative size of one-loop correction to the charged-current matter potential of electron-type neutrinos or antineutrinos turns out to be $6\%$, whereas that to the neutral-current matter potential of all-flavor neutrinos or antineutrinos can be as large as $8\%$. The implications of such corrections for neutrino oscillations are briefly discussed.

Speaker: Jihong Huang

WIN2023_poster_Jihong_Huang.pdf

15:30 Type-II Seesaw Triplet Scalar Effects on Neutrino Trident Scattering

In Type-II seesaw model, an electroweak triplet scalar field $\Delta$ with a non-zero vacuum expectation value (vev) $v_\Delta$ is introduced to facilitate the generation of small neutrino masses. A non-zero $v_\Delta$ also affects the W mass through the electroweak $\rho$ parameter, making it to be less than 1 as predicted by standard model (SM). The component fields in $\Delta$ come along introduce additional contributions to reduce the SM rare neutrino trident scattering cross section. These fields also induce new processes not existed in SM, such as $l_i \to \overline{ l_j} l_k l_l$ and $l_i \to l_j \gamma$. There are severe constraints on these processes which limit the effects on neutrino trident scattering and the $\rho$ parameter and therefore the W mass. The newly measured W mass by CDF makes the central value of $\rho$ parameter to be larger than 1, even larger than previously expected. Combining neutrinoless double beta decay, direct neutrino mass and oscillation data, we find a lower limit for $v_\Delta$ as a function of the triplet scalar mass $m_\Delta$, $v_\Delta > (6.3 \sim 8.4) \mathrm{eV} (100 \mathrm{GeV}/m_\Delta)$. To have significant effect on $\rho$ in this model, $v_\Delta$ needs to be in the range of a GeV or so. However this implies a very small $m_\Delta$ which is ruled out by data. We conclude that the effect of triplet vev $v_\Delta$ on the W mass can be neglected. We also find that at 3$\sigma$ level, the deviation of the ratio for Type-II Seesaw to SM neutrino trident scattering cross section predictions is reduced to be below 1, but is restricted to be larger than 0.98.

Speaker: Zhonglv Huang (TDLI)

海报.pdf

15:30 XAFS coupled TEM Beamline

To meet the requirements of testing materials during synthesis and reactions in petrochemical industry, we provide a method by combining the XAFS and TEM to obtain the local coordination structure, chemical composition, chemical valence state, microscopic morphology of samples at the same time

Speaker: Xu Wang (深圳综合粒子研究院)

Abstract.pdf

16:30 → 17:50 Overview talks 4: Astro-particle Physics & Cosmology

Convener: Jan Hamann (T)

16:30 Cosmological implications for neutrino physics

The standard hot Big Bang model predicts a thermal background of relic neutrinos with a present-day temperature of T = 1.95K. At 330 neutrinos per cubic centimetre, the shear abundance of these neutrinos means that they can exert measurable influences on the evolution of the Universe, and leave their imprints on the precision cosmological observables. In this talk, I discuss how precision cosmological observations of the cosmic microwave background and the large-scale structure distribution can be used to probe neutrino physics, from neutrino masses to neutrino decay.

Speaker: Prof. Yvonne Wong (UNSW)

YvonneWong.pptx

17:10 Recent results from IceCube with GeV to PeV neutrinos

The IceCube experiment is a Cherenkov detector instrumented over a cubic kilometer, deep under the South Pole ice. Its primary array enables the detection of high-energy neutrino emissions from astrophysical sources, while a more densely instrumented subdetector, called DeepCore, located at the bottom of the main array, focuses on the detection of neutrinos down to GeV energies, where atmospheric neutrinos are dominant. This presentation highlights recent findings derived from oscillation measurements using atmospheric neutrinos within the energy range of 5-100 GeV and astrophysical studies employing high-energy datasets (>1 TeV) of neutrinos. The talk aims to provide an overview of these results and future prospects.

Speaker: Dr Shiqi Yu

WIN2023_ IceCube results.pdf

19:00 → 22:00 Dinner

Tuesday, 4 July

08:30 → 10:30 Overview talks 5

Convener: Prof. Wei Wang (Sun Yat-Sen University)

08:30 Neutrino Applications: From Science Fiction to Reality

Speaker: Prof. Jonathan Link (Virginia Tech)

WIN2023-Link-Plenary.pptx

09:10 CEvNS with Noble Liquids

Speaker: Prof. Kaixuan Ni (UC San Diego)

CEvNS-NobleLiquids.pdf

09:50 Experimental overview of EW and BSM physics at CMS and ATLAS

Speaker: Xiaohu SUN (Peking University)

EWnBSM-XiaohuSUN-WIN2023.pdf

10:30 → 11:00 Coffee break

11:00 → 12:20 Highlight talks 2

Convener: Prof. Ke Han (Shanghai Jiao Tong University)

11:00 Effective Field Theories for Weak Interactions and Neutrinos

Speaker: Prof. Jiang-Hao Yu

WIN2023EFTYu.pdf

11:40 Status and Prospect of Double Beta Decay Experiment

Speaker: Prof. Yury Kolomensky

Status and Prospects of Neutrinoless Double Beta Experiments

12:20 → 12:30 Sponsor talk 3: Hamamatsu (10 min)

Speaker: Hamamatsu

12:30 → 14:00 Lunch

14:00 → 15:40 Parallel talks 1: Applications of Nuclear Technology

Convener: Ran HAN (BISEE)

14:00 The JUNO-TAO detector is a unique tool for studying and monitoring nuclear reactors

JUNO-TAO is a liquid scintillator antineutrino spectrometer being built as a satellite experiment within the Jiangmen Underground Neutrino Observatory (JUNO). The JUNO-TAO detector will be placed about 30 m from one of the twins EPR reactors of the Taishan nuclear power plant (Taishan, Guangdong Province, China). In the 90s of the 20th century, it was experimentally proved that antineutrino spectrometers based on liquid scintillators are capable to monitor the power of a nuclear reactor and the isotopic composition of a fuel. These capabilities provide a complementary way of nuclear power plant reactor monitoring with respect to the standard methods. Moreover, such capability offers a promising safeguard tool for independent verification of the declared reactor power. The development of such monitoring tool is supported by the International Atomic Energy Agency (IAEA).
Ten square meters of SiPM photons sensors with more than 50% photon detection efficiency will observe the spherical volume of liquid scintillator with 4500 photoelectrons per MeV light output in the TAO detector. SiPMs dark current rate is suppressed by 3 orders of magnitude due to operation at minus 50 degrees Celsius. The detector will capture about 2000 reactor antineutrinos within the fiducial volume per day. It is designed to be well shielded from cosmogenic and ambient backgrounds to have the background-to-signal ratio better than 10%. Unprecedented energy resolution of TAO-detector is expected due to symmetrical construction, low temperature scintillator and cooled photo sensors together with comprehensive active and passive shielding. These features open a way for precise reactor antineutrino spectrum measurement which making TAO-detector a promising tool to contribute greatly to applied antineutrino physics and open a possibility for industrial tool development.

Speaker: Dr Alexander CHEPURNOV (Lomonosov Moscow State University, Skobelcyn Institute for Nuclear Physics)

WIN 2023 TAO status report_final.pdf

14:25 The CHANDLER Reactor Neutrino Detector Technology

Speaker: Jonathan Link (Virginia Tech)

CHANDLER_WIN2023.pptx

14:50 Geoneutrino measurement with Borexino

Borexino is a neutrino experiment whose detector is hosted by LNGS of Italy. The detector uses organic liquid scintillator and thus geo-neutrinos above 1.8 MeV can be detected via inverse-beta-decay. On 2020 Januaray, Borexino published the updated results on geo-neutrinos using 3262.74 days of data between December 2007 and April 2019, and the exposure is twice of its previous results. Around 50 geo neutrinos are found after removing backgrounds. Different geological predictions are tested against this result and 2.4σ tension is found between the result and earth models which predict the lowest concentration of heat producing elements in the mantle. In this talk, I will review the analyses, results, and implications on geo-science.

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

20230704 Geoneutrino measurements with Borexino.pdf

15:15 Latest result of geoneutrino measurement with KamLAND (remote)

The decays of radioactive isotopes, uranium, thorium and potassium, inside the Earth generate a significant amount of radiogenic heat and contribute to the Earth’s heat budget. The abundance of these elements is a key parameter to reveal the planet’s geophysical activities. Geoneutrinos originated from these isotopes are unique probe to the composition, and thus, the amount of the radiogenic heat in the Earth. KamLAND has observed geoneutrinos from $^{238}$U and $^{232}$Th with 1 kt liquid scintillator for more than 18 years. The low-reactor period since 2011 enabled a spectroscopic measurement of geoneutrinos from $^{238}$U and $^{232}$Th by reducing the most significant background, reactor neutrino. The number of geoneutrino signal is estimated to be $116.6^{+41.0}_{−38.5}$, $57.5^{+24.5}_{−24.1}$ and $173.7^{+29.2}_{−27.7}$ from $^{238}$U, $^{232}$Th and $^{238}$U+$^{232}$Th, respectively. These correspond to geoneutrino flux of $14.7^{+5.2}_{−4.8}$, $23.9^{+10.2}_{−10.0}$ and $32.1^{+5.8}_{−5.3}$ $\times10^{5}$ cm$^{−2}$s$^{−1}$, respectively. The null-signal hypothesis is disfavored at 8.3$\sigma$ confidence level. This study yields the first constraint on the radiogenic heat contribution from $^{238}$U and $^{232}$Th individually, which is consistent to geochemical predictions based on the compositional analysis of chondrite meteorites.
published article : https://doi.org/10.1029/2022GL099566

Speaker: Dr Nanami Kawada (Tohoku University)

Latest result of geoneutrino measurement with KamLAND WIN2023.pdf

14:00 → 15:40 Parallel talks 1: Astro-particle Physics & Cosmology

Convener: Ramesh Koirala (Nanjing University)

14:00 Multi-messenger approach to the origin of high energy cosmic rays/neutrinos

Speaker: Zhuo Li (Peking University)

01_lizhuo.pptx

14:25 The Future of High-Energy Astrophysical Neutrino Measurements: Standard Model and beyond

The next generation of neutrino telescopes, including Baikal-GVD, KM3NeT, P-ONE, TAMBO, IceCube-Gen2 and TRIDENT, will be able to determine the flavor of high-energy astrophysical neutrinos precisely. With the aid of future neutrino oscillation experiments --- in particular JUNO, DUNE, and Hyper-Kamiokande --- the regions of flavor composition at Earth that are allowed by neutrino oscillations will shrink by a factor of ten between 2020 and 2040. The observation of Glashow resonant events will also break the degeneracy between the neutrino production from hadronuclear and photohadronic processes. We critically examine the ability of future experiments and show how these improvements will help us pin down the source of high-energy astrophysical neutrinos. As illustrations of beyond-the-Standard-Model physics, we also show that future neutrino measurements will constrain the decay rate of heavy neutrinos and the quantum gravity scale in theories of extra dimensions.

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

WIN2023.pdf

14:50 Signature of Collapsars as Sources for High-energy Neutrinos and r-process Nuclei

If collapsars are sources for both high-energy (HE) neutrinos and r-process nuclei, the profuse low-energy antineutrinos from beta-decay of the newly synthesized nuclei can annihilate the HE neutrinos. Considering HE neutrinos produced at internal shocks induced by intermittent mildly-magnetized jets, we show that such annihilation suppresses the overall HE neutrino spectrum above 300 TeV and produces a corresponding flavor composition of (1:10:1) at source. We find that the emergent HE neutrino flux can well fit the diffuse flux observed at IceCube if contributions from all similar sources are taken into account. Our results highlight the unique role of HE neutrinos in supporting collapsars as sources for r-process nuclei, and can be tested by accurate measurement of the diffuse HE neutrino flux spectrum and flavor composition, as well as detection of HE neutrinos from individual sources.

Speaker: Gang Guo (China University of Geosciences (Wuhan))

collapsar-WIN2023.pdf

15:15 Neutrino Signals From Accretion-Induced Collapse of White Dwarfs

About 90% of stars end up as white dwarfs, and there should be about 10 billion white dwarfs in the Milky Way alone. It is well-known that a white dwarf reaching the Chandrasekhar limit of about 1.4 solar masses may undergo a thermonuclear explosion (type Ia supernova). However, it may also go through the Accretion-Induced Collapse (AIC) due to electron capture by neon and magnesium at its core. We perform neutrino radiation hydrodynamic simulations of AIC. A proto-neutron star forms after the core bounce, and a very bright neutrino burst comparable to that of a core-collapse supernova is emitted. There has been no confirmed observation of AIC yet. However, The upcoming multi-messenger observations, especially neutrino detections, offer great opportunities to study AIC with unprecedented details.

Speaker: Chun Ming Yip (The Chinese University of Hong Kong)

04_YipChunMing_WIN2023_v2.pptx

14:00 → 15:40 Parallel talks 1: Electroweak Interactions

Convener: Bing Li (Shandong University)

14:00 HVV, Higgs mass, CP

Speaker: Qianying Guo (Beihang Univ.)

WIN2023_QianyingGUO_27062023_v3.pdf

14:25 Higgs fermion at the CMS experiment

Speaker: Zhiyuan Li (Peking Univ.)

2023-07-04 Higgs fermions couplings.pdf

14:50 Searches for new physics in the Higgs sector

The discovery of the Higgs boson with a mass of 125 GeV completed the particle content predicted by the Standard Model (SM). Even though this model is well established and consistent with many measurements, it is not capable to solely explain some observations. Many extensions of the SM addressing such shortcomings have additional (neutral or charged) Higgs bosons. In some models, the Higgs boson can also serve as a portal to a dark sector, through e.g. invisible decays. Finally, new physics could also appear through modifications of the cross-section and kinematics of the elusive Higgs boson pair (HH) production process. The current status of searches for additional low- and high-mass Higgs bosons, for invisible Higgs boson decays and for HH production, based on the full LHC Run 2 dataset of the ATLAS experiment at 13 TeV, are presented.

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

BSM_Higgs_ATLAS_Lailin_202307.pdf

15:15 Searches for new phenomena with the ATLAS detector

Many theories beyond the Standard Model (BSM) have been proposed to address several of the Standard Model shortcomings, such as the origin of dark matter and neutrino masses, the fine-tuning of the Higgs Boson mass, or the observed pattern of masses and mixing angles in the quark and lepton sectors. Many of these BSM extensions predict new particles or interactions directly accessible at the LHC. This talk will present some highlights on recent searches based on the the full Run 2 data collected by the ATLAS detector at the LHC with a centre-of-mass energy of 13 TeV, and prospects for searches in the High-Luminosity LHC.

Speaker: Oliver Stelzer-Chilton (TRIUMF)

win_2023_v4.pptx

14:00 → 15:40 Parallel talks 1: Flavour & Precision Physics

Convener: Avelino Vicente

14:00 Charm meson decays at BESIII

BESIII has collected 2.93 and 7.33 fb^-1 of e+e- collision data samples at
3.773 and 4.128-4.226 GeV, which provide the largest dataset of DDbar and DsDs pairs in the world, respectively. In this talk, we will report the updated measurements of |Vcs| in Ds+->tau+ nu and the form factor studies in
Ds+->K+K- e+ nu and pi+pi- e+ nu. In addition, we will report the most
updated amplitude analyses of Cabibbo-favored and -suppressed Ds decays at BESIII, including the observation of a new a0-like state at 1.817 GeV, the branching fraction measurements of D mesons decay involving KL0 and multiple kaons/pions, and the doubly Cabibbo-suppressed decay D0 →K+pi-pi0. We will also report the improved measurement of the strong-phase difference in quantum-correlated DD decays. Finally, we will introduce prospect on measurements of charmed meson hadronic decays with the coming 20 fb-1 at
3.773 GeV data collected by BESIII.

Speaker: Zehui Lu (IHEP)

charm meson decays at BESIII.pdf

14:25 CPV measurement in Bs2PhiPHi decay

A flavor-tagged time-dependent angular analysis of the decay Bs→ϕϕ is
performed using pp collision data collected by the LHCb experiment at the
center-of-mass energy of 13TeV, corresponding to an integrated luminosity of
6 fb−1. The CP-violating phase and direct CP-violation parameter are measured to
be ϕs=−0.042±0.075±0.009 rad and |λ| = 1.004 ± 0.030 ± 0.009, respectively, assuming the same values for all polarization states of the ϕϕ system. This is the most precise study of time-dependent CP violation in a penguin-dominated B meson decay. The results are consistent with CP symmetry and with the Standard Model predictions.

In this presentation, I will explicitly introduce the analysis procedures impletemented in this measurement, and discuss the results correspondence with the SM predictions.

Speaker: Kechen Li

WIN2023-Kechen.pdf

14:50 CP Violation Induced by Neutral Meson Mixing Interference

We propose a novel kind of CP violation effect --- the double-mixing CP asymmetry --- in a type of cascade decays that involves at least two mixing neutral mesons in the decay chain. It is induced by the interference between different oscillation paths of the neutral mesons in the decay process. The double-mixing CP asymmetry has unique phenomenological value because it still exists in the absence of strong phases and thus provides opportunities for clean determination of CKM phase angles and searches for new physics. The numerical analysis is performed for the example channel $B^0_s \to \rho^0 \bar{K}^0 \to \rho^0 (\pi^-\ell^+{\nu}_\ell)$ to show that the double-mixing CP asymmetry can be very significant and practically measurable by experiments.

Speaker: Yin-Fa Shen (Huazhong University of Science and Technology)

double-mixing cpv.pdf

15:15 Recent Results of $B$ Mesogenesis and Dark Sector at $BABAR$

Searching for New Physics beyond the Standard Model is one of the most intriguing topics in modern physics, and many theoretical models predict new particles with masses well below the electroweak scale. The $BABAR$ experiment collected data at the energy of $\Upsilon(4S)$, suitable for discovering such new particles.This talk presents several recent searches for B Mesogenesis and dark sector particles at $BABAR$, including the scenarios that the $B$ meson decays to a baryon and a dark particle simultaneously, searches for $B$ meson decays to axion-like particles via gauge boson coupling, and for self-interacting dark matter in electron-position annihilation.

Speaker: Dexu Lin (Institute of Modern Physics)

babar_zhWIN2023_Lin.pdf

14:00 → 15:40 Parallel talks 1: Neutrino Physics

Convener: Xiang Xiao (Sun Yat-Sen University)

14:00 Latest results from the CUORE experiment

The Cryogenic Underground Observatory for Rare Events (CUORE) is the first bolometric experiment searching for 0νββ decay that has been able to reach the one-tonne mass scale. The detector, located at the LNGS in Italy, consists of an array of 988 TeO2 crystals arranged in a compact cylindrical structure of 19 towers. CUORE began its first physics data run in 2017 at a base temperature of about 10 mK and in April 2021 released its 3rd result of the search for 0νββ, corresponding to a tonne-year of TeO2 exposure. This is the largest amount of data ever acquired with a solid state detector and the most sensitive measurement of 0νββ decay in 130Te ever conducted, with a median exclusion sensitivity of 2.8×10^25 yr. We find no evidence of 0νββ decay and set a lower bound of 2.2 ×10^25 yr at a 90% credibility interval on the 130Te half-life for this process. In this talk, we present the current status of CUORE search for 0νββ with the updated statistics of one tonne-yr. We finally give an update of the CUORE background model and the measurement of the 130Te 2νββ decay half-life, study performed using an exposure of 300.7 kg⋅yr.

Speaker: Claudia Tomei (INFN Sezione di Roma)

ClaudiaTomei_CUORE_WIN2023.pdf

14:25 Latest result of neutrinoless double-beta decay search by KamLAND-Zen (remote)

Detection of neutrinoless double-beta decay ($0\nu\beta\beta$) would be an evidence of Majorana nature of neutrino, which clue on the extremely light neutrino mass and the matter dominant universe.
The KamLAND-Zen experiment started a search for $0\nu\beta\beta$ of $^{136}$Xe nuclei in 2011 (KamLAND-Zen400). The experiment was upgraded in 2019 by double amount of xenon nuclei and a tenfold reduction in uranium and thorium contamination (KamLAND-Zen 800). In addition, lots of new analytical technics including particle identification with neural network have been developed.
A combined analysis of the KamLAND-Zen 400 and 800 dataset yields a lower limit of the half life of $0\nu\beta\beta$: $T^{0\nu\beta\beta}_{1/2}=2.3\times 10^{26}$ years at 90% confidence level, which corresponds to the most strong upper limit on the effective Majorana neutrino mass of 36--156 meV with different nuclear matrix elements. This experiment achieved the first search of $0\nu\beta\beta$ in the inverted neutrino mass hierarchy region.
published article : https://doi.org/10.1103/PhysRevLett.130.051801

Speaker: Nanami Kawada (Tohoku University)

Latest result of neutrinoless double-beta decay search by KamLAND-Zen WIN2023.pdf

14:50 Neutrinoless Double Beta Decay Experiments in China

Searching for the neutrinoless double beta decay (0𝜈𝛽𝛽) in experiment is now regarded as the topmost promising instrument to explore the nature of neutrinos. Many international collaborations search for this rare nuclear decay through different detector techniques. In China, the CDEX and PandaX experiments at the China Jinping Underground Laboratory (CJPL) have carried out the 0𝜈𝛽𝛽 search based on the existing experimental conditions. The CUPID-CJPL experiment based on the bolometric technology, the N𝜈DEx experiment based on the ion time projection chamber, and JUNO-0𝜈𝛽𝛽 based on the liquid scintillator detector are actively being developed. In this talk, we report the status, progress, and future planning of the 0𝜈𝛽𝛽 experiments in China.

Speaker: Shaobo Wang (Shanghai Jiao Tong University)

WIN23-Shaobo.pdf

15:15 The CUPID double beta decay experiment

Neutrinoless double-beta decay (0$\nu\beta\beta$) is a key process to address some of the major outstanding issues in particle physics, such as the lepton number conservation and the Majorana nature of the neutrino. Several efforts have taken place in the last decades in order to reach higher and higher sensitivity on its half-life. The next-generation of experiments aims at covering the Inverted-Ordering region of the neutrino mass spectrum, with sensitivities on the half-lives greater than 10$^{27}$ years. Among the exploited techniques, low-temperature calorimetry has proved to be a very promising one, and will keep its leading role in the future thanks to the CUPID experiment. CUPID (CUORE Upgrade with Particle IDentification) will search for the neutrinoless double-beta decay of $^{100}$Mo and will exploit the existing cryogenic infrastructure as well as the gained experience of CUORE, at the Laboratori Nazionali del Gran Sasso in Italy. Thanks to 1596 scintillating Li$_2$MoO$_4$ crystals, enriched in $^{100}$Mo, coupled to 1710 light detectors CUPID will have a simultaneous readout of heat and light that will allow for particle identification, and thus a powerful alpha background rejection.
Numerous studies and R&D projects are currently ongoing in a coordinated effort aimed at finalizing the design of the CUPID detector and at assessing its performance and physics reach.
In our talk, we will present the current status of CUPID and outline the forthcoming steps towards the construction of the experiment.

Speaker: Long Ma (Fudan University)

win2023_talk_LongMa.pdf

15:40 → 16:10 Coffee break

16:10 → 17:50 Parallel talks 2: Applications of Nuclear Technology

Convener: Jonathan Link (Virginia Tech)

16:10 Geo-neutrino signal at JUNO predicted by geological models

The Jiangmen Underground Neutrino Observatory (JUNO) located in Jiangmen, Guangdong, China is facilitated with a 20 kton liquid scintillator detector. One of the goals of the JUNO experiment is to detect geo-neutrinos produced by radioactive decay of U and Th, in order to provide constraints on the composition and radiogenic heat budget of Earth’s mantle.
To test different mantle composition models, the geo-neutrino flux from the U and Th rich crust must be properly estimated first. In addition, the detect probability of geo-neutrinos decreases with increasing distance from the radioactive source, making the signal contribution from local crust critical. This talk will report the expected geo-neutrino signals at JUNO based on different geological models, with a focus on local crust models.

Speaker: Prof. Ruohan Gao (China University of Geosciences)

WIN2023Abstract.pdf

WIN2023_geoneutrino.pdf

16:35 Research and Design of the Jinping Neutrino Experiment

Jinping Underground Laboratory has the advantage of the world's largest vertical rock overburden and the farthest distance to commercial nuclear power plants. The suppression of cosmic-ray muon-induced backgrounds and the neutrinos from the reactor can significantly improve the measurement accuracy of solar and geo neutrinos in the MeV energy region. The 0.5 to 15 MeV interval is an important exploration area for solar neutrino experiments, where the accuracy of pep neutrinos, low-energy B8 neutrinos, and CNO neutrinos can be improved for the study of solar neutrino oscillations, especially the transition behavior of oscillations from vacuum to matter, i.e., the matter effect, excluding assumptions of new physics. These measurements can also be used to determine the metallicity of the Sun. It is also convenient to measure the geoneutrino flux at Jinping, investigating the radiogenic heat contribution of the Himalayas and the content of U and Th radionuclides in the Earth. A hundred-ton scale experiment is planned and is going to be constructed in the second phase of Jinping underground laboratory. In this talk, I will present the progress of the hundred-ton detector.

Speaker: Prof. Zhe Wang (Tsinghua University)

Jinping RD - Zhe Wang.pdf

17:00 Muon Radiography and Its Applications

Muon radiography has become an innovative and promising technique for internal density structure imaging, based on measuring the attenuation of cosmic-ray muons after penetrating the target. We have developed a portable muon detector which composed of plastic scintillator and SiPM. By using the detector, we performed several muon radiography experiment in China, such as imaging the overburden structures in tunnel and subway station, the internal structure of volcanoes, as well as in archaeology and industry filed. We also developed effective algorithms for muon radiography and scattering imaging, like Grey Relational Analysis (GRA) based on PoCA to identify the Multi-Materials Tightly Combined (MMTC) objects interface, the low-energy particles eliminating method to refine muon radiography for volcanoes, and novel 3D internal structure imaging methods and so on.

Speaker: Ran Han (北京卫星环境工程研究所)

Imaging large object structure using cosmic muons.pdf

17:25 Cryogenic phonon-scintillating bolometer technology and applications

The low temperature detector based on phonon detection has the advantages of high energy resolution, low energy threshold and low background. This makes it become one of the most competitive detection techniques for searching for neutrino frontier physics, including neutrinoless double beta decay, coherent elastic neutrino-nucleus scattering, neutrino mass, etc. This talk will focus on cryogenic phonon-scintillating bolometer technology and its applications related to neutrinos.

Speaker: Dr Mingxuan Xue (University of Science and Technology of China)

Bolometer_applications_ustc_xuemx.pdf

16:10 → 17:50 Parallel talks 2: Astro-particle Physics & Cosmology

Convener: Hao-Ning He (Purple Mountain Observatory,)

16:10 The DArk Matter Particle Explorer (DAMPE): 7 years in Space

The DArk Matter Particle Explorer (DAMPE; also known as ``Wukong'') is a satellite-borne, calorimetric type experiment that has been successfully operating in space since December 2015, designed to detect cosmic rays up to unprecedentedly high energies. The scientific goals of DAMPE are indirect detection of possible indirect dark matter signatures, comic-ray physics, and gamma-ray astronomy. In this talk, we first give an overview of the DAMPE mission, its on-orbit operation status. Then, we highlight the recent scientific results regarding cosmic-ray and gamma-ray observations.

Speaker: Chuan Yue

02_DAMPE_YueC_WIN2023.pdf

16:35 HAWC Gamma-ray Observatory

The High Altitude Water Cherenkov (HAWC) gamma-ray observatory is a wide-field gamma-ray observatory located in Puebla, Mexico. The HAWC detector is composed of an array of water Cherenkov detectors (WCDs) that provides an instantaneous field of view of 2 sr and can observe 2/3 of the very high energy (VHE, 100 GeV < E < 100 TeV) gamma-ray sky every day because of its high duty cycle (>95%). The HAWC observatory provides an excellent instrument for developing source catalogs as well as monitoring the sky for transient phenomena. With over five years of accumulated data, HAWC allows to study particle accelerators: pulsar wind nebulae (PWNe), supernova remnants (SNR), and active galactic nuclei. HAWC recently implemented an outrigger array that improves the sensitivity of the experiment above 10 TeV, allowing for a better understanding of these sources.

Speaker: Ramiro Torres-Escobedo (Shanghai Jiao Tong University)

HAWC_overview_presentation.pdf

17:00 Gamma-ray astronomy results from LHAASO

Very-high-energy (VHE,100GeV-100TeV) and ultra-high-energy (UHE, >100TeV) gamma-ray observations play a special role in the era of multi-messenger astronomy. Large High Altitude Air Shower Observatory (LHAASO), located high on the edge of Tibetan Plateau at an average altitude of 4410 meters, is a dedicated gamma-ray hunter at energy range from sub-TeV to PeV. This hybrid array consists of Kilometer Square Array (KM2A), Water Cherenkov Detector Array (WCDA), and Wide Field of view Cherenkov Telescope Array (WFCTA).
LHAASO has shown its powerful ability to detect VHE and UHE gamma radiation for dozen Galactic sources and even the PeV gamma-ray emission from the Crab Nebula by using only partially running data. Besides the significant progress on extending continuous energy spectra of plentiful gamma-ray sources and diffuse gamma-ray emission of the Galactic plane, newly released the 1st catalog by LHAASO has reported interesting discovery of 32 TeV sources, and additionally, 43 UHE sources at > 4σ significance level. Thanks to the wide field of view, time resolution, sensitive response for gamma rays, the afterglow from a narrow jet in the extremely bright GRB 221009A was unprecedently detected by LHAASO covering the energy range of 0.2–7TeV. Remarkable studies on new physics, such as LIV and dark matter, by LHAASO will be also reported in this talk.

Speaker: Zhe Li (Institute of High Energy Physics)

04_Zhe Li-gamma ray astronomy results from LHAASO.pdf

16:10 → 17:50 Parallel talks 2: Electroweak Interactions

Convener: Gang Li (Sun Yat-sen University)

16:10 Double aligned two Higgs doublet models at LHC

Speaker: Michihisa Takeuchi (Sun Yat-sen University)

WIN2023_20230704.pdf

16:35 Dark sector and Axion-like particle search 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 data set of J/psi (10 Billion), psi(2S) (2.6 Billion), and about 25 fb-1 scan data from 3.77 to
4.95 GeV, we are able to search various dark sectors produced in e+e- annihilation and meson decay processes. In this talk, we report the search for dark photon candidate in e+e- ->gamma A’ with invisible decay. The invisible decay of a light Higgs boson A0 in J/psi->gamma A0, dark sectors in Lambda/Lambda_c invisible decay processes are also searched. Axion-like particles (ALPs) are pseudo-Goldstone bosons arising from some spontaneously broken global symmetry, addressing the strong CP or hierarchy problems. The BESIII experiment has collected 10 Billion J/psi and 2.6 Billion psi(2S) events, which is the largest J/psi & psi(2S) data set in the world. With these data, the BESIII experiment searches for an Axion-like particle with mass in o(GeV) scale in J/psi-> gamma a, with a->gamma gamma.

Speaker: Houbing Jiang (Wuhan University)

Win2023_JHB.pdf

17:00 ALP explanation to the muon (g-2) and its test at future Tera-Z and Higgs factories

Models with an axionlike particle (ALP) can provide an explanation for the discrepancy between experimental measurement of the muon anomalous-magnetic moment $(g-2)_\mu$ and the Standard Model prediction. This explanation relies on the couplings of the ALP to the muon and the photon. We also include more general couplings to the electroweak gauge bosons and incorporate them in the calculations up to the 2-loop order. We investigate the existing experimental constraints and find that they do not rule out the ALP model under consideration as a possible explanation for the $(g-2)_\mu$ anomaly. At the same time, we find the future Tera- $Z$ and Higgs factories, such as the CEPC and FCC-ee, can completely cover the relevant parameter space through searches with final states $(\gamma \gamma) \gamma\left(\mu^{+} \mu^{-}\right) \gamma$, and $\left(\mu^{+} \mu^{-}\right) \mu^{+} \mu^{-}$.

Speakers: Xiaoping Wang (Beihang University) , Jia Liu (Peking University)

Win2023-XPW.pdf

17:25 A concise review on some Higgs-related new physics models in light of current experiments

Speaker: Pengxuan Zhu (ITP, CAS)

win2023-SYSU-Pengxuan_Zhu_updated.pdf

16:10 → 18:15 Parallel talks 2: Flavour & Precision Physics

Convener: Wenbin QIAN (University of Chinese Academy of Sciences)

16:10 Hyperon physics at BESIII

With the large datasets on 𝑒+𝑒−-annihilation at the 𝐽/𝜓 and 𝜓(3686) resonances collected at the BESIII experiment, multi-dimensional analyses making use of polarization and entanglement can shed new light on the production and decay properties hyperon-antihyperon pairs. In a series of recent studies performed at BESIII, significant transverse polarization of the (anti)hyperons has been observed in 𝐽/𝜓 or 𝜓(3686) to ΛΛ ̄ , ΣΣ ̄ , ΞΞ ̄, and Ω−Ω ̄+ and the spin of Ω− has been determined model independently for the first time. The decay parameters for the most common hadronic weak decay modes were measured, and due to the non-zero polarization, the parameters of hyperon and antihyperon decays could be determined independently of each other for the first time. Comparing the hyperon and antihyperon decay parameters yields precise tests of direct, Δ𝑆 = 1 CP-violation that complement studies performed in the kaon sector.

Speaker: Hong-Fei Shen

WIN2023_BESIII_Hyperon.pdf

16:35 Recent results of the exotic hadron studies at CMS

The speaker will report some selected CMS contributions to the exotic hadron studies, including Y(4140)--the first exotic hadron seen at LHC, X(3872) seen in B_s decay, X(3872) seen in PbPb data, the first observation of a new structure X(6600) in the JpsiJpsi invariant mass spectrum, and the evidence of another new structure X(7300) seen also in the JpsiJpsi channel.

Speaker: Zhen Hu (Tsinghua University)

20230704-WIN2023_02.pdf

17:00 Recent results of the exotic states studies at LHCb

The talk will report the recent studies of the production and decay of X(3872), and the discovery of new tetraquark and pentaquark candidates.

Speaker: Dongliang Zhang (Central China Normal University)

LHCb_exotic_states_dzhang.pdf

17:25 TMD wave functions and soft functions at one-loop in LaMET

TMDPDFs and TMDWFs are important physical quantities characterizing the distributions of constituent momentum in the hadron, and reflect the non-perturbative internal structure of hadrons. In large-momentum effective theory (LaMET), the TMDWFs can be extracted from the first-principle simulation of a four-quark form factor and quasi-distributions. We provide a one-loop proof of TMD factorization of the form factor by using expansion by regions. For the one-loop validation, we also present a detailed calculation of O(αs) perturbative corrections to these quantities, in which we adopt a modern technique for the calculation of the TMD form factor based on the integration by part and differential equation. The one-loop hard functions are then extracted. Using lattice data from Lattice Parton Collaboration on quasi-TMDWFs, we estimate the effects from the one-loop matching kernel and find that the perturbative corrections depend on the operator to define the form factor, but are less sensitive to the transverse separation. These results will be helpful to precisely extract the soft functions and TMD wave functions from the first principle in the future.

Speaker: Zhifu Deng (Shanghai Jiao Tong University)

document.pdf

报告_Deng2.pdf

17:50 Search for rare charm decays at BESIII

The BESIII experiment has collected 2.6B psi(2S) events and 10B J/psi events. The huge data sample provide an excellent chance to search for rare processes in charmonium and charm meson decays. In this talk, we report the recent search for J/psi->D^-e+nu_e, psi(2S)->Lambda_c anti-Sigma^-. In addition, LFV process J/psi->e tau/e mu & BNV/LNV process D^0->p e/n e, and the FCNC process D^0 -> pi^0 nu \bar{nu} is also searched at BESIII.

Speaker: Yonghua Zhan (Sun Yat-Sen (Zhongshan) University)

win2023_rarecharm_zhanyh.pdf

16:10 → 17:50 Parallel talks 2: Neutrino Physics

Convener: Claudia Tomei (INFN Sezione di Roma)

16:10 Current Results from the NOvA Experiment

NOvA is a long-baseline neutrino oscillation experiment which observes the intense NuMI beam of mostly $\nu_\mu$ (or $\bar{\nu}_\mu$) using two functionally identical detectors: the $\sim$1kt Near Detector (ND) 100m underground and 1km from the NuMI target at Fermilab, and the 14kt Far Detector (FD) 810km away on the surface at Ash River Falls in northern Minnesota. Both detectors are composed of liquid scintillator filled PVC cells, allowing calorimetry with a long radiation length to provide good resolution of both $\nu_\mu$ and $\nu_e$ CC interactions and tagging of NC showers. The FD is located near the first $\theta_{23}$ oscillation minimum, allowing the study of $\theta_{13}$ via $\nu_e$ appearance, and has sensitivity to the neutrino mass ordering and CP-violating $\delta$ due to matter effects along the long trip to Minnesota. Results from an exposure of $13.6\times10^{20}$ protons on target (POT) of neutrino data combined with $12.5\times10^{20}$pot anti-neutrino data will be presented, along with highlights from highlights from NOvA's non-oscillation physics program.

Speaker: Alec Habig (University of Minnesota Duluth)

NOvA-WIN23.pdf

16:35 Hyper-Kamiokande experiment (remote)

Hyper-Kamiokande is a next-generation neutrino experiment that is under construction in Japan. It consists of a 260 kt underground water Cherenkov detector with a fiducial volume more than 8 times larger than that of Super-Kamiokande. It will serve both as a far detector of a long-baseline neutrino experiment and an observatory for astrophysical neutrinos and nucleon decays.
The long-baseline neutrino experiment will detect neutrinos originating from the upgraded 1.3 MW neutrino beam produced at the J-PARC accelerator 295 km away. A near detector suite, close to the accelerator, will help characterize the beam before the oscillation and minimize systematic errors.
The experiment will investigate neutrino oscillation phenomena including CP-violation and mass ordering by studying accelerator, solar and atmospheric neutrinos as well as conduct neutrino astronomy studying solar, supernova and supernova relic neutrinos. It will also search for nucleon decays.
In this talk, we will present an overview of the Hyper-Kamiokande experiment, its current status and physics sensitivity.

Speaker: Yohei Noguchi (University of Tokyo, Kamioka Observatory)

WIN2023_HyperK_v4.pdf

17:00 Neutrino oscillation physics of the DUNE experiment

The DUNE experiment is a next-generation, long-baseline neutrino oscillation experiment currently being constructed at Fermilab and SURF. Its primary scientific goals are the definitive determination of the neutrino mass ordering, the definitive observation of charge-parity symmetry violation (CPV) for most of the true values of the charge-parity violating phase, $\delta_{CP}$, and precise measurement of oscillation parameters, particularly $\delta_{CP}$, $\sin^2 2\theta_{13}$, and the octant of $\theta_{23}$. These measurements will help guide theory in understanding if there are new symmetries in the neutrino sector and whether there is a relationship between the generational structure of quarks and leptons. Observation of CPV in neutrinos would be an important step in understanding the origin of the baryon asymmetry of the universe. In this talk, we will review DUNE’s potential for neutrino oscillation.

Speaker: Wenjie Wu (University of California, Irvine)

20230704@WIN2023-DUNEOsc.pdf

17:25 MicroBooNE results on Short Baseline Neutrino Anomalies

The MicroBooNE experiment utilizes an 85-ton active volume liquid argon time projection chamber (LArTPC) neutrino detector. It can distinguish between photons and electron electromagnetic showers and select charged current electron neutrino and muon neutrino events with exceptional performance. In this talk, we will present results on MicroBooNE's investigation of the MiniBooNE Low Energy Excess and neutrino Short Baseline Anomalies more generally. We will present the initial findings from MicroBooNE's search for sterile neutrinos in a 3+1 model, utilizing Fermilab's Booster Neutrino Beam (BNB). We will explore the impact of degeneracy caused by the cancellation of nue appearance and disappearance. Additionally, we will demonstrate how combining data from BNB and Neutrinos at the Main Injector (NuMI) beams, which have substantially different nue/numu ratios, can break this degeneracy. Moreover, we will show MicroBooNE's search for neutrino-induced single-photon production and the latest developments in the search for single-photons.

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

MicroBooNE_WIN_XJI.pdf

MicroBooNE_WIN_XJI.pptx

Wednesday, 5 July

08:30 → 10:30 Highlight talks 3

Convener: Zhen Hu (Tsinghua University)

08:30 The progress of Electroweak and Beyond the Standard Model studies at CEPC

Speaker: Jia Liu (Peking University)

2023-07-05-CEPC-WIN2023-JiaLiu.pdf

09:10 Recent measurements of CP violation

This is an invited plenary highlight talk on CP violation by the Belle/Belle II collaboration. The contents will include the results from all related experiments, such as LHCb, BESIII, etc., not limited to Belle/Belle II.

Speaker: Dr Yinghui Guan

CPV_WIN2023_Guan_v1.4.pdf

09:50 Lepton Favor Universality experimental highlights

This talk will focus on recent experimental results on Lepton Favor Universality (LFU) tests in the charm and beauty sectors. These results include studies on leptonic and semileptonic D decays from the BESIII experiment. The most recent LFU test results in semileptonic B decays, including R(D) and R(D) from LHCb and R(Xe/μ) from BELLEII, will also be discussed. Finally, the talk will introduce the latest R(K) and R(K) measurements from LHCb.

Speaker: Liang Sun (Wuhan University)

LFU_WIN2023_LS.pdf

10:30 → 11:00 Coffee break

11:00 → 12:20 Highlight talks 4

Convener: Dexu Lin (Institute of Modern Physics)

11:00 Charged Lepton Flavour Violation Experiments

The concept of lepton flavor lies at the heart of the Standard Model (SM) of elementary particle physics. However, the fundamental symmetries underlying the flavor structures remain unexplained. In the SM, the transitions between generations of charged leptons, involving charged lepton flavor violation (CLFV), are highly suppressed. Nonetheless, numerous theories beyond the SM propose significant rates of LFV processes within the reach of ongoing or proposed experiments. This review focuses on the precision frontier of exploring charged lepton flavor violation. We discuss the current status and future prospects of experimental quests for charged lepton flavor violation in the muon channel. These endeavors not only test the predictions of the SM but also provide crucial insights into new physics phenomena.

Speaker: Dr Chen Wu (Osaka University)

CLFV Experiments.pdf

11:40 Muon g-2 theory overview

Fermilab announced a new experimental result for muon g-2 on April 27, 2021. The statistical uncertainty of the new result is similar to the previous BNL result and the central value is consistent. The combined value is 4.2 standard deviations away from the Standard Model prediction. An update from Fermilab with much more statistics is expected soon. For the Standard Model prediction, the two hadronic contributions, HVP (hadronic vacuum polarization) and HLbL (hadronic light-by-light) are the dominant sources of uncertainty. I will review the recent updates on the theoretical determination of these two contributions with lattice QCD calculations and dispersive approaches.

Speaker: Prof. Luchang Jin (University of Connecticut)

win2023-muon-g-2-luchang-jin.pdf

12:20 → 14:00 Lunch

14:00 → 15:40 Parallel talks 3: Applications of Nuclear Technology

Convener: Qing Lin (University of Science and Technology of China)

14:00 The COHERENT experimental program at the SNS

COHERENT collaboration is the first that observed Coherent elastic neutrino-nucleus scatter (CEvNS) events in 2017. A 14.6 kg CsI(Na) was placed 20 meters away from the Spallation Neutron Source (SNS) at the Oak Ridge National Laboratory (ORNL). The first measurement of CEvNS on Argon was then followed up in 2020. The 1.4 MW SNS pulsed proton beam provides a uniquely high-quality and high-intensity neutrino source. Our low-energy-threshold detectors sited in the low-background "Neutrino Alley" near this source are producing world-leading sensitivities on broad physics topics, such as inelastic neutrino-nucleus interactions, searches for accelerator-produced dark matter (DM) and physics beyond the Standard Model. COHERENT's ongoing and near-future programs and their physics reaches will be discussed in detail.

Speaker: Keyu Ding (University of south Dakota)

COHERENT.pdf

14:25 CEvNS experiment proposal at CSNS

The detection and cross section measurement of Coherent Elastic Neutrino-Nucleus Scattering (CEvNS) is vital for particle physics, astrophysics and nuclear physics. In 2017，the COHERNET collaboration reported the first observation of CEvNS signal. A new CEvNS detection experiment is under our schedule. Four pure CsI crystals, weight 3kg and coupled with two Photon Multiplier Tubes (PMTs) each, will be cooled down to 77K and placed at China Spallation Neutron Source (CSNS) to detect the CEvNS signals produced by neutrinos from stopped pion decays happening within the Tungsten target of CSNS. Owing to the extremely high light yield of pure CsI at 77K (33.5PE/keVee), even though only having a neutrino flux 30% weaker than COHERENT, the detectable signal event rate is still expected to be ～600 per year. Low radioactivity materials and devices will be used to construct the detector and strong shielding will be applied to reduce the radioactive background. Dual-PMT readout will be able to reject PMT-related background like Cherenkov light and PMT dark noise. With all the strategies above, we are hoping to reach a ～6.0σ signal detection significance by one-year data taking.

Speaker: Prof. Qian Liu (University of Chinese Academy of Sciences)

CloverS-2023.7.5.pptx

14:50 Progress of CICENNS

Speaker: Prof. SOOBONG KIM (Sun Yat-sen University)

CICENNS-WIN23.pptx

15:15 A Reactor-Neutrino-Nucleus Coherent Scattering experiment with dual phase argon technology

The coherent elastic neutrino-nucleus scattering (CEνNS) phenomenon, as predicted by the Standard Model, was initially observed in 2017 by the COHERENT collaboration. The detection of CEνNS, characterized by a significantly higher cross-section compared to the inverse beta decay (IBD), has introduced a novel and potent approach for reactor monitoring, nuclear structure exploration, neutrino property investigation, and exploration of new physics beyond the standard model. Currently, various experimental technologies are being developed to detect CEνNS from reactor neutrinos. Among these technologies, the dual-phase argon detector with a low detection threshold down to sub-KeVnr is of particular interest for observing CEvNS from reactor neutrinos. Our proposal entails the deployment of a hundred-kilogram dual-phase argon time projection chamber detector, positioned 35 meters away from the Taishan reactor in Guangdong, China. In this presentation, we will outline the anticipated event rate for CEνNS detection by utilizing underground argon and optimizing the background veto strategy. Furthermore, we will provide an estimation of the detector's sensitivity to measure neutrino properties, based on its preliminary design.

Speaker: Yong-Peng Zhang (高能所)

CEvNS with argon talk-win2023.pdf

14:00 → 15:40 Parallel talks 3: Astro-particle Physics & Cosmology

Convener: Zhuo Li

14:00 The Sensitivity Floor for Primordial Black Holes Neutrino Searches

Primordial black holes (PBHs) are a well-motivated dark matter (DM) candidate over a wide range of masses. Light, asteroid- mass primordial black holes could be detected using neutrinos produced via Hawking radiation. We discuss using neutrino to search for non-rotating PBHs with monochromatic mass distributions, spanning from 5 × 10^14 g to 10^16 g. We consider the null observations of antineutrino flux from several neutrino detectors and set new constraints on the PBHs as a dark matter candidate. We also set the constraint using data from forecasts on JUNO detectors. In addition, we note that the Diffuse Supernova Neutrino Background (DSNB) is an unavoidable isotropic background, we thus estimate the sensitivity floor up to mass about 10^16 g caused by DSNB on PBHs dark matter.

Speaker: Qishan Liu (The Chinese University of Hong Kong)

win2023-Qishan_LIU.pdf

14:25 Solar atmospheric neutrinos and implications for dark matter

The Sun is a high-energy gamma-ray and neutrino source due to cosmic rays interacting with the solar atmosphere. It is also a popular target for dark matter searches with high-energy neutrinos, as dark matter could be trapped and annihilate at the core of the Sun. However, from the gamma-ray observations with HAWC and Fermi, it is clear that the complex solar magnetic fields play an important role in the production of solar atmospheric gamma rays, and thus also the neutrinos. I will discuss current theoretical and observational status of the high-energy Sun, as well as the implications of these solar atmospheric gamma rays and neutrinos on dark matter searches from the Sun.

Speaker: Kenny CHUN YU NG (The Chinese University of Hong Kong)

solar_atmnu.pdf

14:50 Supernova neutrinos as a precise probe of nuclear neutron skin

A precise and model-independent determination of the neutron distribution radius $R_{\rm n}$ and thus the neutron skin thickness $R_{\rm skin}$ of atomic nuclei is of fundamental importance in nuclear physics, particle physics and astrophysics but remains a big challenge in terrestrial labs. We argue that the nearby core-collapse supernova (CCSN) in our Galaxy may render a neutrino flux with unprecedentedly high luminosity, offering perfect opportunity to determine the $R_{\rm n}$ and $R_{\rm skin}$ through the coherent elastic neutrino-nucleus scattering (CE$\nu$NS). We evaluate the potential of determining the $R_{\rm n}$ of lead (Pb) via CE$\nu$NS with the nearby CCSN neutrinos in the RES-NOVA project which is designed to hunt CCSN neutrinos using an array of archaeological Pb based cryogenic detectors. We find that an ultimate precision of $\sim 0.1 \%$ for the $R_{\rm n}$ ($\sim 0.006$ fm for the $R_{\rm skin}$) of Pb can be achieved via RES-NOVA in the most optimistic case that the CCSN explosion were to occur at a distance of $\sim 1 ~\rm{kpc}$ from the Earth.

Speaker: Dr Xurun Huang (The Chinese University of Hong Kong)

PhysRevD.106.123034.pdf

15:15 Cosmology with the Square Kilometre Array

Speaker: Xin Wang

04_SKA_cosmology_Xin.pptx

14:00 → 15:40 Parallel talks 3: Electroweak Interactions

Convener: Bin Yan (IHEP)

14:00 SMEFT at future lepton colliders

With the completion of the Standard Model, there is no guarantee that new particles can be found at current or future colliders. Meanwhile, precision measurements of the Higgs and electroweak bosons at future lepton colliders offer a great opportunity for probing new physics beyond the Standard Model. The Standard Model Effective Field Theory (SMEFT) provides an ideal framework for a model-independent interpretation of these measurements. In this talk, I will try to provide an overview on the global SMEFT analyses at future lepton colliders, highlight some of my own work, and briefly discuss how these analyses could benefit from machine learning techniques.

Speaker: Jiayin Gu (Fudan University)

ees22.pdf

14:25 The interplay of EWPO and top interactions in SMEFT fits at Electroweak Interactions

In the Standard Model Effective Field Theory (SMEFT), operators involving
the top quark are generally difficult to probe, and can generate sizable loop contributions to the electroweak precision observables, measured by past and future lepton colliders. Could the high precision of the electroweak measurements compensate the loop suppression and provide competitive reaches on these operators? Would the inclusion of these contributions introduce too many additional parameters for a meaningful global electroweak analysis to be done? In this paper, we perform a detailed phenomenological study to address these two important questions. Focusing on eight dimension-6 operators that generate anomalous couplings between the electroweak gauge bosons and the third-generation quarks, we calculate their one loop contributions to the e+e− → ff¯ processes both on and off the Z-pole and the e−e+ → WW process. A global analysis is performed with these eight operators and the ones that contribute to the above processes at tree level, using the measurements at LEP, SLC and several low energy experiments. We find that, while the current electroweak precision measurements are sensitive to the one-loop effects of the top quark operators, it is difficult to separate them from the operators that contribute at the tree level, making a global analysis rather challenging. Under more assumptions (for instance that the new physics contribute only to the third generation quark operators and the S, T parameters), competitive reaches could be obtained in a global fit. Another important finding of our study is that the two operators that generate dipole interactions of the bottom quark have significant impacts in the Z-pole measurements and should not be omitted. We
also discuss the implication of the recently reported W-boson mass measurement at CDF to our results. Finally, we estimate the reaches of future lepton colliders in probing the top-quark operators with precision electroweak measurements.

Speaker: Dr Yiming Liu (BIT)

Yiming Liu.pdf

14:50 Top quark mass measurements at CEPC

Speaker: Xiaohu Sun (Peking Univ.)

mTop-CEPC-XiaohuSUN-WIN2023.pdf

15:15 Recent di-boson and tri-boson measurements at CMS

Speaker: Zhe Guan (Peking Univ.)

WIN_Di_Tri_Bosons.pdf

14:00 → 15:40 Parallel talks 3: Flavour & Precision Physics

Convener: Hailong Ma (IHEP)

14:00 Charmed baryon physics at BESIII

BESIII has collected 4.5 fb^-1 of e+e- collision data between 4.6 and 4.7 GeV. This unique data offers ideal opportunities to study Lambda_c+ decays. We will report the partial wave analysis of Lambda_c+ -> Lambda pi+ pi0 and the observations of Cabibbo-suppressed Decays Lambda_c+ decays, including Λ+c → nπ+ etc. In addition, we will report the form factor measurement in Lambda_c+ -> Lambda e+ nu and Lambda mu+ nu, the observation of Lambda_c+->p K-e+nu, and the improved measurement of Lambda_c+->Xe+nu.

Speaker: Lei Li (Beijing Institute of Petro-chemical Technology)

CharmBaryonPhysicsatBESIII.pdf

14:25 Recent results from the Belle II experiment

The Belle II experiment at the SuperKEKB asymmetric-energy electron-positron collider has been collecting the world’s highest-intensity collisions at the $\Upsilon$(4S) since 2019. A data set comparable in size to that of predecessor experiments, and collected with the new detector, enables unique or world-leading results. Examples include indirect searches for non-standard-model physics in the weak interactions of quarks, determinations of fundamental standard-model parameters, and direct searches for low-mass dark matter. This talk presents a selection of recent results and briefly discusses future perspectives.

Speaker: Chengping Shen (Fudan University)

shen-win_02.pdf

14:50 The heavy flavor rare decays at CMS

The heavy flavor rare decays allow exploring energy scales much higher than the ones directly accessible and present good chances to search for the beyond the Standard Model phenomena. Several observables, such as the branching fractions, the R values and the angular distribution parameters, are utilized to enhance the searching for BSM in the flavor rare decays, because of their sensitivities to the potentially existing BSM processes. In the recent decades of years, these measurements of heavy flavor rare decay have presented many intriguing results from different experiments, in which the CMS collaboration has made a significant contribution.

Speaker: Chuqiao Jiang (Peking University)

Heavy flavor rare decay at CMS (final draft).pdf

15:15 Light quark decays of doubly heavy baryons in light front approach

We explore the semileptonic and nonleptonic decays of doubly heavy baryons $(\Omega_{cc}^ {(*) +}, \Omega_{bb}^ {(*)0}, \Omega_{bc}^ {(*)-}, \Omega_{bc}^{\prime0}) $ induced by the $s\to u$ transition. Hadronic form factors are parametrized by transition matrix elements and are calculated in the light front quark model. With the form factors, we make use of helicity amplitudes and analyze semileptonic and nonleptonic decay modes of doubly heavy baryons. Benchmark results for partial decay widths, branching fractions, forward-backward asymmetries and other phenomenological observables are derived. We find that typical branching fractions for semileptonic decays into $\ell\bar\nu$ are at the order $10 ^ {-7}-10^ {-8} $ and the ones for nonleptonic decays are at the order $10^ {-5} $, which are likely detectable such as in LHCb experiment. With the potential data accumulated in future, our results may help to shape our understanding of the decay mechanism in the presence of two heavy quarks.

Speaker: Chang Yang (Shanghai Jiao Tong University)

win-talk-Chang Yang.pptx

14:00 → 15:40 Parallel talks 3: Neutrino Physics

Convener: Fei Gao (Tsinghua University)

14:00 First Physics Results from the FASER Experiment

FASER is an experiment dedicated to searching for light, extremely weakly-interacting particles at LHC. Such particles may be produced in the very forward direction of the LHC's high-energy collisions and then decay to visible particles inside the FASER detector, which is placed 480 m downstream of the ATLAS interaction point. FASER also includes a sub-detector, FASERν, designed to detect neutrinos produced in the LHC collisions and to study their properties. Recently, FASER reported the first direct observation of neutrino interactions at a particle collider experiment. Around 153 neutrino candidate events (>16 sigma) are identified in a 13.6 TeV center-of-mass energy pp collision data set of 35.4/fb using the active electronic components of FASER. These events are consistent with the characteristics expected from neutrino interactions in terms of secondary particle production and spatial distribution, and they imply the observation of both neutrinos and anti-neutrinos with an incident neutrino energy of significantly above 200 GeV.

Speaker: Zhen Hu (Tsinghua University)

Faser_WIN2023.pdf

14:25 A study of time variations of solar neutrino flux using 5,804 live days of Super-Kamiokande data (remote)

We report a study of time variations of solar Neutrino flux using 5,804 live days of Super-Kamiokande data. The data used in this analysis were obtained from 31 May 1996 to 30 May 2018. The measured exact time of high-yield solar neutrino events for 22 calendar years of accumulated data allows for studying solar neutrino modulations with unprecedented precision. The measured time variation of solar neutrino fluxes is consistent with the Kepler constants of eccentricity(1.53+/-0.35%) and perihelion shift (1.5+/-13.5 days) as preliminary results. Periodic modulations of the solar neutrino flux are probed using a 5-day interval data set. Lomb-Scargle periodogram and maximum likelihood methods are applied to search for potential periodic modulations in the solar neutrino fluxes. We found no statistically significant implication of periodicity other than annual modulation in the observed solar neutrino data. In sensitivity test, we can propose the exclusion limit which is larger than 4.9% modulation amplitude.

Speaker: Jeong Yeol Yang (Seoul National University)

Time_variation_jyyang_WIN2023.pdf

14:50 T2K latest neutrino oscillation results

T2K is a long baseline neutrino experiment which exploits a neutrino and antineutrino beam produced at the Japan Particle Accelerator Research Centre (J-PARC) to provide world-leading measurements of the parameters governing neutrino oscillation. Neutrino oscillations are measured by comparing neutrino rates and spectra at a near detector complex, located at J-PARC, and at the water-Cherenkov far detector, Super-Kamiokande, located 295 Km away.

The latest T2K results include multiple analysis improvements, in particular a new sample is added at the far detector requiring the presence of a pion in muon-neutrino interactions. It is the first time that a pion sample is included in the study of neutrino disappearance at T2K and, for the first time, a sample with more than one Cherenkov ring is exploited in the T2K oscillation analysis, opening the road for future samples with charged- and neutral-pion tagging. The inclusion of such a sample assures proper control of the oscillated spectrum on a larger neutrino-energy range and on subleading neutrino-interaction processes. Results of the oscillations fits and prospects for future improvements will be discussed.

Speaker: Weijun Li (Oxford University)

T2K Recent Results and Update.pptx

15:15 The European Spallation Source neutrino Super Beam plus Project

The European Spallation Source neutrino Super Beam (ESSνSB) is a long-baseline neutrino project that will measure the CP-violation (CPV) in the leptonic sector at the second, rather than the first, $\nu_{μ}$ to $\nu_{e}$, oscillation maximum, where the sensitivity is $\sim$ 3 times higher. The use of the 5 MW proton beam of the ESS linac combined to a $\sim$ 3 cubic-km Water Cherenkov detector located at the second oscillation maximum paves the way to a precise measurement of the CPV phase, $\delta_{CP}$. The ESS$\nu$SB Conceptual Design Report showed that that after 10 years of data taking, more than 70$\%$ of the possible $\delta_{CP}$ range will be covered with 5$\sigma$ C.L. to reject the no-CP-violation hypothesis. The expected value of $\delta_{CP}$ precision is smaller than 8$^{\circ}$ for all $\delta_{CP}$ values, making it the most precise proposed experiment in the field by a large margin. The next phase of the project, the ESSνSB+, which has been started in Jan. 2023, for a 4-year design study program, aims in using the intense muon flux produced together with neutrinos to measure the neutrino-nucleus cross-section (the dominant term of the systematic uncertainty) in the energy range of 0.2 – 0.6 GeV, using a Low Energy nuSTORM (LEnuSTORM) and a Low Energy Monitored Neutrino Beam (LEMNB) facilities.

In this talk, an overview of successfully concluded design-study of the experiment and its physics reach will be presented. Moreover, the recently accepted, by the Horizon-Europe program, extension project, the ESS$\nu$SB+, will be also presented.

Speaker: Dr Tamer Tolba (Hamburg University)

ESSvSB_WIN23_TamerTolba_v2.pptx

15:40 → 16:10 Coffee break

16:10 → 17:50 Parallel talks 4: Applications of Nuclear Technology

Convener: Prof. Qian Liu (IHEP)

16:10 ReActor neutrino LIquid xenon Coherent Scattering (RELICS) experiment

The neutrino-nucleus coherent scattering (CEνNS), as a low-energy channel of neutrino neutral current, was predicted right after the discovery of W, Z bosons. Not until its detection in 2017 using the high-energy neutrino flux from a neutron spallation source, CEνNS had been evading detection due to its very low energy deposition. CEνNS has the highest cross-section among all interaction channels for MeV neutrinos which come from nuclear reactions, making it the most promising way of remote monitoring and detection of nuclear reactors. The biggest challenges are how to lower the energy threshold to keV and sub-keV, and how to mitigate/identify the cosmogenic background in a sea-level detector. Liquid xenon time projection chamber (TPC), because of its excellent performance in the direct search of dark matter particles, is a promising detector technique for the reactor CEνNS search. In this talk, I will introduce the RELICS experiment which aims at reactor CEνNS detection for the first time using liquid xenon TPC.

Speaker: Qing Lin (University of Science and Technology of China)

RELICSv2.pdf

16:35 CONUS experiment: new results and the upgrade campaign to CONUS+

The CONUS experiment (COherent elastic NeUtrino nucleus Scattering) is searching for coherent elastic neutrino-nucleus scattering (CeνNS) with germanium detectors in Brokdorf Nuclear Power Plant (KBR, Germany). Four 1kg modules are placed 17m near the 3.9GW reactor core, monitoring an energy regime down to sub-keV with a background rate of ~10 per day per keV. In late 2022 the data taking was finished after reactor shut down and an additional period of background measurement. The collaboration is now constructing its successor experiment, CONUS+, which is relocated in Leibstadt Nuclear Power Plant (KKL) in Switzerland. In this talk, I will present the preliminary result from the final data set of CONUS, along with the proceedings of CONUS+ upgrade and its physics potential.

Speaker: Dr Kaixiang Ni (Max Planck Institute for Nuclear Physics)

CONUS WIN2023.pdf

17:00 Search for the coherent elastic neutrino-nucleus scattering and other rare processes in nuGeN experiment at Kalinin nuclear power plant

The experiment nuGeN is aimed at studying the properties of antineutrinos from the 3.1 GWth reactor of the Kalinin NPP (Udomlya, Russia). The experimental setup was installed under the reactor core of the KNPP on a special lifting platform at a distance of 11.1-12.2 m from center of the reactor core, which allows to operate an enormous flux of antineutrinos in (3.6 - 4.4)*10^13 (cm-2 sec-1). A reactor surrounding materials (overburden equivalent to about 50 m w.e.) serve as good shielding against cosmic rays. The signals sought are recorded by a specially designed low-background, low-threshold, germanium detector surrounded on all sides by active and passive combined radiation shielding. A detailed overview of the experimental setup, the current status of measurements, and the obtained results will be presented at the conference.

Speaker: Dr Alexey Lubashevskiy (Joint Institute for Nuclear Research)

lubashevskiy_WIN2023.pdf

17:25 RECODE program for reactor neutrino CEvNS detection with PPC Germanium detector (remote)

Coherent Elastic Neutrino-Nucleus Scattering, also known as CEvNS, describes the physical process of atomic nucleus scattering with neutrino as a whole, and the scattering cross section is approximately proportional to the square of atomic nucleus neutron number. The research on CEvNS has important scientific significance and application value. The RECODE project (Reactor neutrino COherent scanning Detection Experiment) is a recently proposed experimental plan, which uses two sets of high-purity germanium arrays to jointly measure and accurately measure the CEvNS process of reactor neutrino. The high-purity germanium technology used comes from the PPC germanium detector technology developed by CDEX in dark matter experiments. The PPCGe has significant advantages such as low energy threshold, low background, and good long-term stability et. al., which key performance parameters have been confirmed and tested in CDEX's long-term dark matter experiments. This talk will introduce the RECODE experimental plan and expected results.

Speaker: Dr Litao Yang (Tsinghua University)

WIN2023-ROCODE program-Litao Yang - final.pdf

16:10 → 17:50 Parallel talks 4: Astro-particle Physics & Cosmology

Convener: Chuan Yue (Purple Mountain Observatory)

16:10 Constraining Particle Dark Matter with eROSITA Early Data

Many well motivated dark matter (DM) particle candidates can decay into detectable X-ray photons. We analyze eROSITA Final Equatorial Depth Survey (eFEDS) from eROSITA early data release to search for unexplained X-ray lines that could indicate DM signal. Having discovered no extra line, we set limits on DM decay rate in mass range between 2-18 keV, and constrain the parameter space of two DM particles: sterile neutrino and axion-like particles. Finally we also study the projected sensitivity of eROSITA full sky search, showing that eROSITA is expected to set stringent limits in the soft X-ray band.

Speaker: Chingam Fong (The Chinese University of Hong Kong)

eFEDS_DM.pptx

16:35 Forbidden Dark Matter Combusted Around Supermassive Black Hole

The forbidden dark matter cannot annihilate into a pair of heavier partners, either SM particles
or its partners in the dark sector, at the late stage of cosmological evolution by definition. We point
out the possibility of reactivating the forbidden annihilation channel around supermassive black
holes. Being attracted towards a black hole, the forbidden dark matter is significantly accelerated
to overcome the annihilation threshold. The subsequent decay of the annihilation products to photon
leaves a unique signal around the black hole, which can serve as a smoking gun for the forbidden
dark matter. For illustration, the Fermi-LAT data around Sgr A∗ provides a preliminary constraint
on the thermally averaged cross section of the reactivated forbidden annihilation that is consistent
with the DM relic density requirement.

Speaker: Yu Cheng (Shanghai Jiao Tong University)

Forbidden_Win2023.pptx

17:00 Cosmological constraints on supersymmetric superWIMPs

Supersymmetric extensions of the standard model with a stable neutral lightest supersymmetric particle (LSP) provide a natural candidate for the dark matter of the Universe. Here we consider scenarios in which the LSP is a superWIMP, i.e., an extremely weakly interacting particle (e.g., a gravitino or axino), produced via the decay of a neutralino NLSP.

These scenarios can be probed at colliders, but only within a very narrow range of NLSP lifetimes. However, if the decay happens in the early Universe, it may affect cosmological observables, such as the Cosmic Microwave Background (CMB), Big Bang Nucleosynthesis (BBN) or the Lyman-alpha forest. We discuss the physics behind this and present constraints on the parameter space of superWIMP scenarios from current cosmological observations, as well as what future experiments will be able to tell us.

Speaker: Jan Hamann (T)

WIN2023.pdf

17:25 Ultra-high-energy Cosmic Ray Outburst from GRB 221009A

Gamma-ray bursts (GRBs) are proposed as origins of ultra-high-energy cosmic rays (UHECRs) since 1995. The non-detection of high-energy neutrinos from the observed GRBs by the IceCube observatory constrain the contriubtion of GRBs to cosmic rays. Lately, GRB 221009A was detected as the B.O.A.T. (“brightest of all time”) GRB with photons of energy up to $\sim$ 18 TeV. We compare timescales of the acceleration, energy loss and escape of cosmic rays in GRB 221009A, suggest that GRB 221009A is able to accelerate protons to $> 10^{20}$ eV. It is difficult for ultra-high-energy protons to escape from the host galaxy, while neutrons with energy larger than 10 EeV, produced in the process of $p+\gamma \rightarrow n+\pi^{+}$, are able to escape from the source as well as the host galaxy without suffering from the serious magnetic field deflection. The escaped neutrons decay into protons in the inter-galactic space, and lose energy via interactions with the extragalactic background light photons and cosmic microwave background photons. After entering the Milky Way, protons will be deflected by the Galactic magnetic field, and arrive at Earth with a time delay. We make predictions on the possible future observations on ultra-high-energy cosmic rays from GRB 221009A by cosmic ray detectors, such as the Pierre Auger Observatory, TA$\times$4 and GRAND.

Speaker: Hao-Ning He (Purple Mountain Observatory,)

04_GRB221009A0702(1).pptx

16:10 → 17:50 Parallel talks 4: Electroweak Interactions

Convener: Lailin Xu (USTC)

16:10 Measurements of electroweak diboson production in association with two jets in ATLAS

Measurements of diboson production in association with two additional jets probe the quartic interactions between electroweak vector bosons predicted in the Standard Model. In this talk, recent results from the ATLAS Experiment are presented. The measurement of the production of electroweak same-sign W boson pairs in association with two jets, as well as the electroweak production of a Zy pair and a pair of Z bosons will be presented. These measurements also include differential cross section measurements of the purely electroweak, as well as mixed strong-electroweak VVjj production. In addition, the observation of the electroweak production of two W bosons with opposite electric charge is reported. The differential measurements are used to set limits on dimension-8 effective field theory operators that modify the quartic electroweak couplings.

Speaker: Yusheng Wu (University of Science and Technology of China)

SM VBS - Y WU - WIN2023 - vF.pdf

16:35 Measurement of multiboson production in ATLAS

Measurements of diboson and triboson production at the LHC probe the electroweak gauge structure of the Standard Model for contributions from anomalous couplings. In this talk recent ATLAS results on the measurement W boson pairs are presented. The measurement improves in precision compared to previous measurements, and is compared to theoretical predictions from fixed order calculation and state-of-the-art event generators. In addition, the observation of rare triboson processes in the Wyy and WZy channels are highlighted, in addition to differential measurements of Zyy production.

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

Measurement of multiboson production in ATLAS_WIN2023.pdf

17:00 WZ cross section measurements at LHCb

LHCb measurements probe a region of phase space at low Bjorken-x where the other LHC experiments have limited sensitivity. This talk shall discuss measurements of the 13TeV and 5.02TeV Z boson production cross-sections to provide constraints on the parton distribution functions which describe the inner structure of the proton.

Speaker: Mr Xiao Wang (Central China Normal University)

WZ cross section measurements at LHCb_v1.pdf

17:25 LHC and Future High Energy Colliders: Probing the nTGC New Physics

Speaker: Rui-Qing Xiao (SJTU)

NTGC.pdf

16:10 → 17:50 Parallel talks 4: Flavour & Precision Physics

Convener: Chen Wu (Osaka University)

16:10 Search for Rare Neutral Kaon Decays at JPARC KOTO Experiment

We present the status of JPARC KOTO experiment to search for very rare $K_L$ decays to $\pi^0 \nu \overline{\nu}$ - an FCNC and direct $CP$ violating decay mode. KOTO has collected $K_L$ data yearly with 30 GeV high intensity proton beam on target at JPARC since 2015 until now with increasing beam power over this period up to 64.5 kW. The results from 2016-18 data published in 2021 ($ BR < 4.9 \times 10^{-9}$) revealed three candidate events in the signal region with $1.22 \pm 0.26$ estimated background events, dominated by the contamination of upstream charged kaon decays which was verified in 2020 run after installing upstream charged beam veto. More data has been accumulated since then. The status of blind analysis and background reductions will be reviewed in this talk with future beam power projections at JPARC and KOTO-DAQ upgrades. Plans for KOTO-II upgrades beyond the Standard Model sensitivity ($3 \times 10^{-10}$) will also be presented.

Speaker: Prof. Yee Bob Hsiung (Department of Physics National Taiwan University)

WIN2023_KOTO_hsiung.pdf

16:35 Precision measurements with Kaons at CERN

The NA62 experiment at CERN collected the world’s largest dataset of charged
kaon decays in 2016-2018, leading to the first measurement of the Branching
Fraction of the ultra-rare K+ → π+ν¯ν decay, based on 20 candidates. This
provides evidence for the very rare K+ → π+ν¯ν decay, observed with a significance
of 3.4σ. This measurement is also used to set limits on BR(K+ → π+X),
where X is a scalar or pseudo-scalar particle. The analysis of the full 2016-2018
data sample and future NA62 plans and prospects are reviewed.
More recent results from NA62 analyses of K+ → π0e+νγ, K+ → π+μ+μ−
and K+ → π+γγ decays, using data samples recorded in 2017–2018, are also
reported. The radiative kaon decay K+ → π0e+νγ (Ke3g) is studied with a
data sample of O(100k) Ke3g candidates with sub-percent background contaminations.
Preliminary results with the most precise measurements of the Ke3g
branching ratios and T-asymmetry are presented. The K+ → π+μ+μ− sample
comprises about 27k signal events with negligible background contamination,
and the presented analysis results include the most precise determination of the
branching ratio and the form factor. The K+ → π+γγ sample contains about
4k signal events with 10% background contamination, and the analysis improves
the precision of the branching ratio measurement by a factor of 3 with respect
to the previous measurements. An overview of the latest NA62 results and the
future prospect of the experiment are presented.
The first observation of the decay K± → π0π0μ±ν (K00μ4) by the NA48/2
experiment at the CERN and the preliminary measurement of the branching
ratio are also presented. The result is converted into a first measurement of
the R form factor in Kl4 decays and compared with the prediction from 1-loop
Chiral Perturbation Theory.

Speaker: Cristina Biino (INFN Torino)

WIN2023_NA62_CBiino_vf.pdf

17:00 Searches for lepton flavour universality violation with the ATLAS detector

In recent years, the study of lepton flavour universality (LFU) violation has garnered significant attention in the field of high energy physics. The ATLAS experiment at the Large Hadron Collider (LHC) has played a crucial role in unraveling the mysteries surrounding LFU and exploring the potential implications for our understanding of the fundamental particles and interactions. In this talk, we will present the latest ATLAS results looking for LFU violation and related theories, such as leptoquarks.

Speaker: Hao Pang (Tsinghua University)

win2023_03.pdf

17:25 Models for the Muon EDM

Electric dipole moments (EDMs) of elementary particles are powerful probes of physics beyond the Standard Model with CP violation. The reported discrepancy in the muon anomalous magnetic moment motivates us to explore to what extent new physics with CP violation to address the discrepancy is probed by ongoing and projected searches for the muon EDM. In this talk, we discuss two benchmark models. The first model is a CP-violating two-Higgs-doublet model where the muon exclusively couples to one Higgs doublet. Since contributions to flavor violating processes as well as the electron EDM are suppressed, the muon EDM becomes an essential probe of the model. Our result shows that some viable parameter space leads to the muon EDM probed by the projected PSI experiment. The second is a model of dark matter (DM) that can explain the muon g−2 anomaly. The model contains a DM fermion and new scalars whose exclusive interactions with the muon radiatively generate the observed muon mass. Constraints from DM direct and indirect detection experiments as well as collider searches are safely evaded. The model parameter space that gives the observed DM abundance and explains the muon g–2 anomaly leads to the muon EDM that can be probed by the PSI experiment. Another viable parameter space even achieves a value of the muon EDM reachable by the ongoing Fermilab muon g−2 experiment and the future J-PARC experiment.

Speaker: Yuichiro Nakai (Shanghai Jiao Tong University)

MuonEDM_3.pdf

16:10 → 17:50 Parallel talks 4: Neutrino Physics

Convener: Shaobo Wang (Shanghai Jiao Tong University)

16:10 Status of the Measurement of Neutrinos Elastically Scattering Off Electrons in the NOvA Near Detector

Neutrinos elastically scattering off atomic electrons is a purely leptonic
process whose cross section can be precisely calculated in the standard
model. A measurement of this process can provide an in-situ constraint
to the absolute neutrino flux in an accelerator-based $\nu_\mu$ beam. NOvA is
a long-baseline neutrino experiment optimized to observe the oscillation
of $\nu_\mu$ to $\nu_e$. It consists of a near detector located 1 km downstream of
the neutrino production target at Fermilab and a far detector located 810
km away in Ash River, Minnesota. This talk presents the status of the
neutrino-electron elastic scattering measurement using the NOvA near
detector, including strategies for selecting the signal, as well as the prospect
of reducing the flux uncertainty.

Speaker: Yiwen Xiao (University of California Irvine)

Nu-E Elastic Scattering WIN23_Final.pdf

16:35 CDEX-300ν program searching for Ge-76 neutrinoless double beta decay

Low background germanium detectors with excellent energy resolution are advantageous to search for $^{76}$Ge neutrinoless double beta decay process. We proposed an experimental program, CDEX-300$\nu$, using $^{76}$Ge enriched broad energy germanium detectors at China Jinping Underground Laboratory (CJPL). In this talk, I will focus on the preconceptual design and plan of the CDEX-300$\nu$. The preliminary R&D progress of detectors, electronics and low background techniques will also be introduced.

Speaker: Mr Wenhao Dai (Tsinghua University)

CDEX-300v Report WIN-2023.pdf

17:00 The search for neutrinoless double beta decay with LEGEND: status and outlook

LEGEND-200, the first phase of the Large Enriched Germanium Experiment for Neutrinoless double beta Decay, has recently started physics operations at the Gran Sasso National Laboratory. LEGEND will have unmatched discovery power in the field, potentially enabling the discovery that lepton number is not a fundamental symmetry in nature and that neutrinos are their own antiparticles. This talk will present initial performance results from LEGEND-200, with the focus on the Germanium detectors. The progress towards the realisation of the next phase of the project, LEGEND-1000, will also be discussed.

Speaker: George Marshall (University College London)

win_slides_v2.pdf

win_slides_v2.pptx

17:25 Overview of nEXO project

The discovery of neutrinoless double beta decay (0vbb) would firmly establish the Majorana nature of the neutrino mass and provide unequivocal evidence of lepton number non-conservation, a clear signature of physics beyond the Standard Model. The nEXO experiment is a monolithic cylindrical time projection chamber (TPC) with 5 tonnes of liquid xenon enriched to 90% in the isotope 136Xe aim to search the neutrinoless double-beta decay (0vbb) mode of 136Xe isotope. In the design, nEXO will achieve 1% energy resolution and with the deep-learning-based topological discrimination, and strong self-shielding of the inner detector volume, finally, can reach a half-life sensitivity to 0vbb excedding 10^28 years at the 90%CL. This talk provides an overview of nEXO project as well as a summary of the diverse range of R&D efforts currently underway.

Speaker: Mr Yuduo Guan (高能所)

Overview_of_the_nEXO.pdf

19:00 → 22:00 Dinner

Thursday, 6 July

08:00 → 22:00 Excursions

Friday, 7 July

08:30 → 10:30 Highlight talks 5

Convener: Lili Yang (Sun Yat-Sen (Zhongshan) University)

08:30 The Deep Underground Neutrino Experiment

The Deep Underground Neutrino Experiment (DUNE) is a next-generation long baseline neutrino experiment for studying neutrino properties with accelerator, atmospheric, and astrophysical sources. The primary physics goals of the DUNE experiment are to determine the neutrino mass ordering, search for new source of CP violation, test the unitarity of the neutrino mass and mixing matrix, search for proton decays, detect supernova neutrinos, measure solar neutrinos, and search for physics beyond the Standard Model (BSM). The DUNE experiment together with the Long-baseline Neutrino Facility consists of four massive 17-kt liquid argon time projection chamber (LArTPC) far detectors, a capable near detector complex, and a powerful accelerator muon neutrino beam. The liquid argon prototype detectors at CERN (ProtoDUNE) are a test-bed for DUNE’s far detectors, which have operated for over 3 years, to inform the construction and operation of the first two and possibly subsequent DUNE far detector LArTPC modules. Here we introduce the DUNE and ProtoDUNE experiments and physics goals as well as discussing recent progress and results.

Speaker: Prof. Xin Qian (Brookhaven National Laboratory)

DUNE_WIN_2023.pptx

09:10 Multi-messenger approach in probing the high energy universe: the case of neutrinos and gamma-ray (remote)

Speaker: Armani Esmaili

WIN2023-Arman.pdf

09:50 The Giant Radio Array for Neutrino Detection (GRAND)

The Giant Radio Array for Neutrino Detection (GRAND) is a planned ground-based detector of ultra-high-energy cosmic rays (UHECRs), gamma rays and neutrinos. It is designed to consist of 20 independent sub-arrays of 10,000 radio antennas each, deployed over an area of 10,000 km$^2$ in radio-quiet locations. One of the primary goals of GRAND is to find the origin of UHECRs via detecting high-energy neutrinos. This is possible due to GRAND's large exposure, sub-degree angular resolution, and high sensitivity to UHE neutrinos. Within 3 years of operation, GRAND is expected to reach an unprecedented sensitivity, making it possible to detect cosmogenic and astrophysical neutrinos. The first stage of antenna deployment for the GRAND prototype has already started in Dunhuang, China and is currently taking calibration data with 14 antennas. In this talk, I will give a brief introduction to the GRAND detector, its science goals, and current status.

Speaker: Ramesh Koirala (Nanjing University)

GRAND_WIN2023.pdf

09:00 → 12:15 Parallel Session on the Application of HEP Technology in Materials Science （First half）

Conveners: Yitao Cui, Chiu Chung Tang (The Hong Kong Polytechnic University)

09:00 Welcome speech

Speaker: Dongbai Sun

09:05 Synchrotron X-Ray Powder Diffraction

Synchrotron X-ray powder diffraction (SXPD) is a powerful technique for advanced materials research, in particular to study structural changes under non-ambient or in operando conditions. It is therefore not surprising that most synchrotron radiation (SR) sources built SXPD instruments (beamlines) as user facilities. To be presented is the basic methodology supported by beamline examples from prominent large-scale SR facilities such as SPring-8 (Japan), ESRF (EU) and Diamond (UK). With design flexibility and spacious configuration, these beamlines are equipped with different X-ray detection systems for the required diffraction geometries and experimental needs. To satisfy the demand from the diverse user community, also equipped are high throughput robotic sample changers, a range of sample environments and online apparatus, e.g. cryostats and furnaces for low and high temperature experiments and battery cyclers, low- and high-pressure gas adsorption cells for in situ studies.

Speaker: Chiu Chung Tang (The Hong Kong Polytechnic University)

09:30 A smart and versatile scattering beamline platform for industrial and scientific applications

Speaker: Lei Li (深圳综合粒子设施研究院)

LIlei.pdf

09:55 Neutron/ synchrotron X-ray powder diffraction on a yttrium-chromium oxide

Speaker: Haifeng Li (The University of Macau)

10:20 Break, Discussion

10:35 Introduction of soft X-ray spectroscopy and plans in Shenzhen Innovation Light-Source Facility

Speaker: Yitao Cui

Advanced synchrotron radiation X-ray spectroscopic beamlines in SILF.pptx

11:00 X-ray total scattering method and its applications

Speaker: Jo-Chi Tseng (Japan Synchrotron Radiation Research Institute)

WIN2023_High_energy_X-ray_scattering_u.pptx

11:25 Controllable Synthesis and In situ Study of Layered Oxide Cathodes for Li-Ion Batteries

Speaker: Mingjian Zhang

WIN2023同步辐射分会-张明建-20230707.pptx

11:50 Study of a cascade gamma-ray coincidence medical imaging system

Speaker: Prof. Qing-Yang Wei

Study of a cascaded gamma-ray medical imaging system.pptx

10:30 → 11:00 Coffee break

11:00 → 12:20 Highlight talks 6

Convener: Jiayin Gu (Fudan University)

11:00 Dark matter direct search experiments

Speaker: Prof. Qing Lin (University of Science and Technology of China)

DMDirectDetection_v0.pdf

11:40 Progress in the measurements of the W mass, the Z-boson transverse momentum and alpha_S

Speaker: Yusheng Wu (University of Science and Technology of China)

SM Precision - Y WU - WIN2023 - vF.pdf

12:20 → 14:00 Lunch

14:00 → 17:30 Parallel Session on the Application of HEP Technology in Materials Science （Second half）

Conveners: Yandong Wang (University of Science and Technology Beijing) , Edman Tsang (The Hong Kong Polytechnic University)

14:00 The Role of X-ray Absorption Spectroscopy in Developing Novel Heterogeneous Catalysts.

Speaker: Molly Meng-Jung Li (The Hong Kong Polytechnic University)

WIN2023-Molly-m.pptx

14:20 Synchrotron X-ray spectroscopy for quantum materials research

Speaker: Haoxiang Li

WIN2023_Talk(1).pdf

14:40 Synchrotron radiation X-ray scattering characterization: sample cells and their applications in the in situ studies

Speaker: Peng Zhang (Sun Yat-sen University)

15:00 Characterization of nanostructure in stainless steels by small angle neutron scattering (SANS)

Speaker: Xin Xu (Sun Yat-sen University)

WIN2023同步辐射分会场会议-许鑫230707.pptx

15:20 High energy synchrotron radiation X-ray characterizations for the advanced fabrication industry

Speaker: Fanqiang Meng (Sun Yat-sen University)

SILF_AM_Meng2.pptx

15:40 Introduction of hard X-ray spectroscopy beamlines in Shenzhen Innovation Light-Source Facility

Speaker: Chunzhen Yang (Institute of Advanced Science Facilities, Shenzhen, China)

20230707 Hard X-ray spectroscopy Beamlines-Chunzhen.pdf

16:00 Localized Deformation and Damage Characterized by Synchrotron-Based X-ray Diffraction

Speaker: Yandong Wang (University of Science and Technology Beijing)

YDWang2023_USTB_珠海.pptx

16:25 Salon: “Development of SR technology in the Greater Bay Area”

Speaker: All Attendees

14:00 → 15:40 Parallel talks 5: Astro-particle Physics & Cosmology

Convener: Kenny CHUN YU NG (The Chinese University of Hong Kong)

14:00 pNGB Dark Matter, Cosmic Strings, and Gravitational Waves

We propose a UV completion model for pseudo-Nambu-Goldstone dark matter with a hidden U(1) gauge symmetry. Dark matter scattering off nucleons is highly suppressed by the UV scale and direct detection constraints can be easily evaded. The kinetic mixing between the hidden U(1) and the $\mathrm{U(1)_Y}$ gauge fields would lead to dark matter decays. The current bound on the dark matter lifetime implies that the UV scale should be higher than $10^9$ GeV. The spontaneous U(1) symmetry breaking at such a high scale would induce cosmic strings with high tension, resulting in a stochastic gravitational wave background with a high energy density. The constraints from current gravitational wave experiments as well as the future sensitivity are investigated. We find that most of the viable parameter points could be well studied in future gravitational wave experiments.

Speaker: Dr Zhao-Huan Yu (Sun Yat-sen University)

YuZH_pNGB_CS_GW.pdf

14:25 The XENONnT Experiment: Dark Matter and Beyond

Located at the Gran Sasso underground laboratories, the XENONnT experiment is a dark matter direct detection experiment that employs a dual-phase liquid xenon time projection chamber with a 5.9-tonne liquid xenon target. Building on the infrastructure developed for XENON1T with several upgrades, the XENONnT experiment is currently acquiring data and pushing the frontiers of astroparticle physics research. This talk will provide an overview of the experiment’s key features, including enhanced sensitivity and unprecedented background reduction capabilities, while showcasing its latest results, such as the WIMP dark matter search with a minimum upper limit of 2.58×10−47 cm² for a WIMP mass of 28 GeV/c², as well as the analysis of electronic recoil data, which benefited from the lowest background rate ever achieved in a dark matter detector.

Speaker: Shixiao Liang (Rice University)

liang_win2023_v1.1.pdf

14:50 The DarkSide-20k experiment

DarkSide-20k represents the next stage of the direct detection dark matter search program based on argon as its target material within the Global Argon Dark Matter Collaboration (GADMC). The experiment is currently under construction at LNGS, Italy. The argon target provides powerful discrimination between the electron (background) and nuclear (signal) recoils in the form of pulse shape discrimination, thanks to the large difference in lifetimes between argon excimers’ singlet and triplet states. The detector will be instrumented as a dual-phase time projection chamber (TPC), filled with Underground Argon (UAr), depleted by a factor of ~1500 in Ar39, viewed from the top and bottom by two large arrays of Silicon Photo Multipliers (SiPM) and enclosed by Gd-loaded PMMA lateral walls. An exposure goal of ≈ 200 tonne-years with near-zero instrumental background is expected to have world-leading sensitivity for particles with a mass above 1 TeV/c2 over a 10-year run. I will report on the ongoing efforts toward the DarkSide-20k.

Speaker: Tianyu Zhu (University of California, Davis)

WIN2023_TIANYU_v3.pdf

15:15 Opportunities to light dark matter searches with the DarkSide-LowMass detector

The search for light dark matter (LDM) particles became possible in recent years mainly thanks to the progress on two different fronts. First, new detection channels were exploited such as the Migdal effect and LDM–electron scattering. Second, new detection techniques were implemented such as the ionization-only channel with a low threshold and argon depleted from the 39Ar β-emitter by cryogenic distillation. The current generation of dark matter detectors employing dual-phase time projection chambers is not well optimized for the detection of LDM particles. Based on the experience of the DarkSide-50 experiment and the construction of its successor DarkSide-20k, a conceptual design for a new medium-sized detector, DarkSide-LowMass, as well as its sensitivity will be presented. A wide range of masses from 10 GeV/c2 down to 10 MeV/c2 can be tested covering a significant and previously unreachable part of the parameter space and even touching the solar neutrino fog. Special attention is paid to the spurious electron background that imposes an effective analysis threshold and strongly affects DarkSide-LowMass’s sensitivity.

Speaker: Dr Maxim Gromov (Moscow State University, Skobeltsyn Institute of Nuclear Physics; Joint Institute for Nuclear Research)

WIN2023_DarkSide-LowMass_Gromov_07-07-2023.pdf

14:00 → 15:40 Parallel talks 5: Electroweak Interactions

Convener: Jiayin Gu (Fudan University)

14:00 Precise prediction for the top quark width

We present the first full analytic results of next-to-next-to-leading order (NNLO) QCD corrections to the top-quark decay width Γ(t → W b) by calculating the imaginary part of three-loop top-quark self-energy diagrams. The results are all expressed in terms of harmonic polylogarithms and are valid in the whole region 0 ≤ mW ≤ mt . The expansions in the mW → 0 and mW → mt limits coincide with previous studies. Our results can also be taken as the exact prediction for the lepton invariant mass spectrum in semileptonic b → u decays. We also analytically compute the decay width including the off-shell W boson effect up to NNLO in QCD for the first time. Combining these contributions with electroweak corrections and the finite b-quark mass effect, we determine the most precise top-quark width to be 1.331 GeV for mt = 172.69 GeV. The total theoretical uncertainties including those from renormalization scale choice, top-quark mass renormalization scheme, input parameters and missing higher-order corrections are scrutinized and found to be less than 1%.

Speaker: Jian Wang (Shandong University)

JianWang_WIN2023.pdf

14:25 Application of the jet charge in electroweak and Higgs physics

Quarks and gluons produced in high-energy particle collisions hadronize before their electric charge can be directly measured. However, information about the electric charge is embedded in the resulting collimated sprays of hadrons known as jets. One jet observable sensitive to the electric charge of quarks and gluons is the momentum-weighted charge sum constructed from charged-particle tracks in a jet, which is called jet charge. In this talk, I will discuss the possible application of the jet charge in the electroweak and Higgs physics.

Speaker: Prof. Bin Yan (IHEP)

jet_charge_BY.pdf

14:50 Search for BSM Higgs at CMS

Speaker: Fengwangdong Zhang (UC Davis)

Higgs-talk-win2023.pdf

15:15 W mass measurements at LHCb

Speaker: Menglin Xu (University of Warwick)

win2023.pdf

14:00 → 15:40 Parallel talks 5: Flavour & Precision Physics

Convener: Zhengyun You (Sun Yat-Sen University)

14:00 Current Status of the COMET Experiment

The COMET experiment at J-PARC aims to search for charged lepton flavor violation (cLFV) process with μN→eN decay. The physics goal of the experiment is to reach the single event sensitivity (S.E.S) at 2.6×10$^{-17}$, which is about four orders of magnitude better than the latest experimental limit. The experiment will produce a high-intensity muon beam with the new bunched slow extraction technique; thus, the properties of the beam remain unknown to us. For a better understanding of the muon beam, we performed the Phase-alpha commissioning by carrying out a low beam intensity run in March 2023. Several detectors were installed downstream of the beamline, and we have got some preliminary results with Phase alpha’s data, which will be shown, together with the current preparation status of the COMET Phase-I experiment, in this talk.

Speaker: Dr Yu Xu (Sun Yat-sen University)

COMET_WIN2023.pptx

WIN_abstract.pdf

14:25 Expected Direct Search Charged Lepton Flavor Violation Sensitivity in $\mu^+$ and $\pi^+$ Decays at Rest

The ability of the Mu2e experiment to probe direct Charged Lepton Flavor Violation (CLFV) $\mu^+$ and $\pi^+$ decay modes is estimated. These direct modes complement the Mu2e indirect search for $\mu^-\rightarrow e^-$ conversion accomplished using proposed detector validation runs. The $\mu^+$ validation run operates at 50% magnetic field and reduced beam intensity, to observe the $e^+$ spectrum from $\mu^+$ decay, at and below the Michel edge $E_e$ ≤ 53 MeV. The validation is used to correct systematic errors by mapping the theoretical Michel spectrum, known to Ο($\alpha^2$), to the observed spectrum. Simultaneously, searches for two-body CLFV $\mu^+\rightarrow e^+ + X$ decay, where $X$ is a light new physics particle can be undertaken. In two weeks of data-taking, Mu2e can achieve 90% C.L. branching ratio limits of $BR_{90}=10^{-7}$ in the mass range 20 ≤ mX ≤ 50 MeV, improving the current experimental limit by two orders of magnitude. In the mass range mX ≤ 20 MeV, if assuming systematic error corrections can be made, it is estimated, using two weeks of data collection, $BR_{90}(m_X=0)=3\times10^{-7}$, an order of magnitude improvement over the current best limit, for the case of V+A or an isotropic coupling. In addition, a two-week $\pi^+$ validation run measuring the $e^+$ in the decay $\pi^+\rightarrow e^+ + \nu$, at 76% magnetic field and introduction of a momentum degrader, allows searching for $\pi^+\rightarrow e^+ + N$ decay, where N is a spin 1/2 particle, in the mass region 20 ≤ $m_N$ ≤ 65 MeV. A branching ratio limit at 90% C.L. of $3\times10^{-8}$ can be achieved, an improvement of the current search sensitivity limit by an order of magnitude.

Speaker: Shihua Huang (Purdue University)

WIN2023.pptx

14:50 The Mu3e experiment: physics and status

Mu3e is an experiment under construction at the Paul Serrer Institute dedicated to the search of the charged lepton flavor violating mu->eee decay at branching fractions of $10^{-16}$, which will be an improvement over the preceding SINDRUM experiment by four orders of magnitude. Furthermore, as the decay is heavily suppressed in the Standard Model, its observation would unambiguously indicate the existence of new physics.

However, achieving such sensitivity requires a high rate of muons and a large kinematic acceptance; hence, excellent momentum, time and vertex resolution is essential to suppress the background and to facilitate the global event reconstruction.

To minimize multiply scattering of low-momentum particle produced from the muons stopped at a target, an innovative tracking detector built from novel thin HV-MAPS technology is used for momentum and vertex reconstruction, complemented with two very precise timing detectors.

Besides, its associated DAQ sub-system is aimed to readout more than 80 Gbps of detector data from sub-detectors with the 1.25 Gbps LVDS links. Meanwhile, online selection algorithms are implemented in hardware to truncate the data rate.
In this talk, the Mu3e detector construction, commissioning status and performance characterization are presented

Speaker: Yifeng Wang (ETH Zürich)

mu3e_WIN2023_Yifeng.pdf

15:15 Higgs LFV decays

The discovery of a non-zero rate for a lepton flavor violating decay mode of the Higgs boson would definitely be an indication of New Physics. We review the prospects for such signal. After a general discussion we concentrate on Two Higgs Doublet Models and show that this scenario contains all the necessary ingredients to provide large flavor violating rates, in particular for Higgs boson decays into τ μ final states. This can be achieved in regions of the parameter space compatible with the stringent limits from direct searches and low-energy flavor experiments.

Speaker: Avelino Vicente (Instituto de Física Corpuscular (CSIC - U. Valencia))

a_vicente.pdf

14:00 → 15:40 Parallel talks 5: Neutrino Physics

Convener: Shun Zhou (高能所)

14:00 Light Sterile Neutrinos at Neutrino Oscillation Experiments (remote)

Neutrino oscillations as a phenomenon have been observed and measured over more than two decades, with datasets growing ever richer. As we enter a time of precision measurements, it is important to take stock of what new effects may be lurking in the data, waiting for us to discover them. In this talk, I will discuss such scenarios and how near-future experiments are well-suited for discovery.

Speaker: Kevin Kelly (Texas A&M University)

KJK_WIN2023.pdf

14:25 Light Sterile Neutrinos: A Modern Picture and a Model to Evade Cosmology (remote)

I will review existing hints and constraints on light sterile neutrinos. I will then explain the primary reasons why these anomalous data sets cannot be simply interpreted as a 1 eV sterile neutrino due to constraints from other experimental probes, notably solar neutrinos and cosmological data sets. I will present a novel, simple model that evades many of these constraints by adding in one new particle, which is the dark matter, beyond a sterile neutrino leading to shape-shifting sterile neutrinos.

Speaker: Peter Denton

230707 (Denton @ WIN23) - Light sterile neutrinos_ A modern picture and a model to evade cosmology.pdf

14:50 Unprecedented Precision on Neutrino Oscillation Parameters using Synergy between DUNE and T2HK (remote)

In this talk, I will discuss in detail the capabilities of the next-generation high-precision long-baseline
neutrino oscillation experiments DUNE and T2HK in isolation and combination to address the major
unknowns in the three-flavor neutrino oscillation paradigm. I will show how the possible
complementarity/synergy among the on-axis DUNE and off-axis T2HK experiments can enhance
the prospects of precise measurements of the two most uncertain oscillation parameters:
atmospheric mixing angle ($\theta_{23}$) and the Dirac CP phase ($\delta_{CP}$) at the early stages
of these experiments, suppressing the parameter degeneracies in three-flavor neutrino oscillation.

Speaker: Sanjib Agarwalla

Sanjib-WIN-07-07-2023.pdf

15:15 New physics beyond three neutrino mixing

Speaker: Yufeng Li (IHEP, Beijing)

LI_Yufeng_WIN2023.pdf

15:40 → 16:10 Coffee break

16:10 → 17:50 Parallel talks 6: Astro-particle Physics & Cosmology

Convener: Maxim Gromov (MSU)

16:10 First results from the LZ dark matter experiment

LUX-ZEPLIN (LZ) is a direct dark matter detection experiment aiming to detect rare events resulting from the scattering of Weakly Interacting Massive Particles (WIMPs). It employs a dual-phase xenon time projection chamber (TPC) with an active mass of 7 tonnes (5.6 tonne fiducial), surrounded by an instrumented xenon skin and liquid scintillator active vetoes. I will give an overview of the LZ project and present its first dark matter search results.

Speaker: Dr Dongqing Huang (University of Michigan - Ann Arbor)

01_First Results from the LZ Dark.pdf

16:35 The progress of ALETHEIA, a low-mass dark matter direct detection experiment

Dark Matter (DM) is one of the most pressing questions in particle physics today: the evidence of DM's existence from astrophysics and cosmology is substantial, while particle physicists know nothing about DM. Direct detection experiments have hunted DM for more than four decades. However, the null results have been consistently concluded by a lot of experiments that implemented variant target materials and detecting methods.

In this talk, I will introduce a recently established low-mass dark matter direct detection, ALETHEIA (A Liquid hElium Time projection cHambEr In dArk matter). Thanks to the extremely low ER (Electron Recoil) and NR (Nuclear Recoil) backgrounds, the ALETHEIA project can potentially help to answer the critical question in particle physics: the nature of dark matter.

The project has officially launched in 2020 and has progressed well in the past three years.

Speaker: Junhui Liao (Brown University / China Institute of Atomic Energy)

2023JulZhuhai.pdf

17:00 Search for solar neutrino and low-mass dark matter with PandaX-4T

Speaker: Wenbo Ma (Shanghai Jiao Tong University)

03_Search for solar neutrino and low-mass dark matter.pdf

16:10 → 17:50 Parallel talks 6: Electroweak Interactions

Convener: Wei Liu (Nanjing University of Science and Technology)

16:10 Spontaneous CP violation and supersymmetry

Speaker: Norimi Yokozaki (Zhejiang Univ.)

Yokozaki_SCPV_talk.pdf

16:35 EWPT & Baryogenesis

Speaker: Huaike Guo (UCAS)

Huaike-Guo.pdf

17:00 Electroweak sphaleron under multiple-step EWPT with the general high dimensional SU(2) multiplet extension to the Standard model

In this study, we present a comprehensive analysis of the electroweak sphaleron formalism and its application to the electroweak phase transition (EWPT). We offer an equivalence proof for various sphaleron configurations and construct the previously unestablished high-dimensional $SU(2)$ sphaleron transformation matrix. Furthermore, we provide an in-depth examination of non-contractible loops and sphaleron boundary conditions. Besides the sphaleron formalism, we investigate the intricacies of the multi-step EWPT. We showcase two distinct analytical approaches for extending the $SU(2)$ scalar multiplet to the standard model (SM) under differing EWPT scenarios, and perform an explicit calculation of the sphaleron energy using a septuplet example. In the context of a single-step EWPT leading to a mixed phase, we find that the additional multiplet's contribution to the sphaleron energy is negligible, primarily due to the prevailing constraint imposed by the $\rho$ parameter. Conversely, in a two-step EWPT scenario, the sphaleron energy can achieve significantly high values during the initial phase, thereby markedly preserving baryon asymmetry if the universe undergoes a first-order EWPT.

Speaker: Yanda Wu (Shanghai Jiao Tong University)

Yanda_Wu_Electroweak_sphaleron_scalar_multiplets_symmetry_breaking_patterns.pptx

17:25 Light dark matter around 100 GeV from the inert doublet model

We made global fits of the inert Higgs doublet model (IDM) in the light of collider and dark matter search limits and the requirement for a strongly first-order electroweak phase transition (EWPT). These show that there are still IDM parameter spaces compatible with the observational constraints considered. In particular, the data and theoretical requirements imposed favour the hypothesis for the existence of a scalar dark matter candidate around 100 GeV. This is mostly due to the pull towards lower masses by the EWPT constraint. The impact of electroweak precision measurements, the dark matter direct detection limits, and the condition for obtaining a strongly enough first-order EWPT, all have strong dependence, sometimes in opposing directions, on the mass splittings between the IDM scalars.

Speaker: Ms Leila Kalhor (Shahid Beheshti University)

2208.13705.pdf

WIN2023.pdf

16:10 → 17:50 Parallel talks 6: Flavour & Precision Physics

Convener: Luchang Jin (University of Connecticut)

16:10 New physics interpretations of $R(D^{(*)})$ anomaly and their exciting predictions

Measurements of the branching ratios of $B \to D^{(*)}\tau\nu / B \to D^{(*)}\ell\nu$ by the BaBar, Belle, and LHCb collaborations consistently point towards an abundance of taus compared to channels with light leptons at the 3-4 sigma level. This $R(D^{(*)})$ anomaly could imply TeV scale new physics. In this contribution, I will first review several new physics interpretations of the $R(D^{(*)})$ anomaly. Then, I will present some exciting new physics predictions; $\Lambda_b$ semi-leptonic decays, $\Upsilon$ leptonic decays, and neutron electric dipole moment. It will be shown that these measurements (with polarization observables in $B \to D^{(*)}\tau\nu$) could confirm the new physics contribution to $R(D^{(*)})$ and distinguish the models of several new physics scenarios.

Speaker: Teppei Kitahara (ITP, CAS)

Kitahara_WIN2023.pdf

16:35 Testing Lepton Flavor Universality at Future Z Factories

As one of the hypothetical principles in the Standard Model (SM), lepton flavor universality (LFU) should be tested with a precision as high as possible such that the physics violating this principle can be fully examined. The run of $Z$ factory at a future $e^+e^−$ collider such as CEPC or FCC-$ee$ provides a great opportunity to perform this task because of the large statistics and high reconstruction efficiencies for $b$-hadrons at $Z$ pole. In this paper, we present a systematic study on the LFU test in the future $Z$ factories. The goal is three-fold. Firstly, we study the sensitivities of measuring the LFU-violating observables of $b \to c\tau\nu$, i.e., $R_{J/\psi}$, $R_{D_s}$, $R_{D^\ast_s}$ and $R_{\Lambda_c}$, where $\tau$ decays muonically. For this purpose, we develop the strategies for event reconstruction, based on the track information significantly. Secondly, we explore the sensitivity robustness against detector performance and its potential improvement with the message of event shape or beyond the $b$-hadron decays. A picture is drawn on the variation of analysis sensitivities with the detector tracking resolution and soft photon detectability, and the impact of Fox-Wolfram moments is studied on the measurement of relevant flavor events. Finally, we interpret the projected sensitivities in the SM effective field theory, by combining the LFU tests of $b \to c\tau\nu$ and the measurements of $b \to s\tau^+\tau^-$ and $b \to s\nu\bar{\nu}$ . We show that the limits on the LFU-violating energy scale can be pushed up to $\sim\mathcal{O}(10)$ TeV for $<\mathcal{O}(1)$ Wilson coefficients at Tera-$Z$.

Speaker: Tsz Hong Kwok (Hong Kong university of Science and Technology)

WIN.pdf

WIN.pptx

17:00 Muon g-2 experiment at Fermilab

The Fermilab Muon g-2 Experiment aims to search for evidence of new physics by measuring the anomalous magnetic moment of muons, represented by the quantity (g-2)/2. The experiment injects muons into a storage ring, where the precession frequency is measured to determine (g-2)/2.

The analysis of the experiment involves two main components: measuring the difference frequency (ωa) between the muon spin precession and cyclotron frequencies and measuring the magnetic field in the storage ring (ω'p) using nuclear magnetic resonance probes calibrated in terms of the equivalent proton spin precession frequency in a water sample.

In the run-1 stage, precise measurements of ωa and ω'p were performed, and the combined result with the previous BNL measurement determined (g-2)/2 to be (116592061 ± 41) × 10^-11, which is 4.2 standard deviations greater than the standard model prediction based on dispersion relation.

Improvements have been made in subsequent runs, including improvements in the stability of storage ring components and data analysis techniques, which are expected to reduce further the uncertainty in the measurement of (g-2)/2.

This talk will cover the published run-1 results and the latest improvements made in the run-2 and run-3 stages of the experiment.

Speaker: Mr Cheng Chen (SJTU)

ChengCHEN_WIN2023.pdf

17:25 A quark and lepton model with flavor specific DM and muon $g-2$ in modular $A_4$ and hidden $U(1)$ symmetries

We consider a quark and lepton model explaining their masses, mixings, and CP violating phases, introducing modular $A_4$ and hidden gauged $U(1)$ symmetries. The hidden $U(1)$ brings us heavier Majorana fermions that are requested by chiral anomaly cancellations, and we work on a canonical seesaw scenario due to their neutral particles. Then, we discuss a scalar dark matter candidate that has flavor specific interactions. In addition, we study muon anomalous magnetic dipole moment where there are not any constraints of lepton flavor violations thanks to this flavor symmetry.

Speaker: Takaaki Nomura (Sichuan University)

T-Nomura0707.pdf

16:10 → 18:15 Parallel talks 6: Neutrino Physics

Convener: Jiangming Yao (Sun Yat-Sen (Zhongshan) University)

16:10 Measuring low energy reactor neutrinos with CEvNS

The measurement of reactor neutrinos from coherent elastic neutrino-nucleus scattering (CEνNS) experiments can be used to probe quenching factor and new physics. We demonstrate that the constraints to new physics by the recent reactor CEνNS experiment at Dresden-II are quite sensitive to the quenching factor at low recoil energies. We also show that a CEνNS experiment with an ultra-low energy threshold like NUCLEUS can measure the flux of reactor neutrinos below the IBD threshold.

Speaker: Prof. Jiajun Liao (Sun Yat-Sen University)

Liao_win_2023.pdf

16:35 The indispensable role of neutrinos in the global fit of SMEFT

Effective field theories (EFTs) have recently undergone rapid developments due to the absence of any new discoveries experimentally. In light of the rich data from various low- and high-energy data now and in the near future, the Standard Model EFT (SMEFT) is adopted as a model-independent tool in searching for new physics indirectly by performing its global fit. While attention has largely been given to (future) colliders due to their high energy and luminosity, in this talk, I will highlight the role of neutrinos especially in the most pessimistic case of no future colliders.

Speaker: Yong Du (TD Lee Institute)

WIN2023-YongDu.pdf

17:00 EFT analysis of Neutrino Experiments (remote)

I will discuss how to analyse neutrino experiments using an Effective Field Theory (EFT) framework. This approach makes possible to include generic non-standard effects in neutrino production and detection, and to study the interplay with non-neutrino experiments. We will discuss the connection with the traditional non-standard interactions (NSI) approach, and the application to specific experiments such as Daya Bay and COHERENT in the context of the SM-EFT. This will show that these experiments should be included in electroweak precision studies from now on. Work based on JHEP 05 (2023) 074, JHEP 10 (2021) 086, JHEP 11 (2020) 048 and JHEP 05 (2019) 173.

Speaker: Martin Gonzalez Alonso (IFIC (Valencia U. & CSIC))

WIN-MGA.pdf

17:25 Neutrino magnetic moment portal: New constraints and multi-messenger opportunities

We scrutinize the hypothesis that gauge singlet fermions - sterile neutrinos - interact with Standard Model particles through the transition magnetic moment portal. These interactions lead to the production of sterile neutrinos in supernovae followed by their decay into photons and active neutrinos which can be detected at γ-ray telescopes and neutrino detectors, respectively. We find
that the non-observation of active neutrinos and photons from sterile-neutrino decay associated to SN1987A yields the strongest constraints to date on magnetic-moment-coupled sterile neutrinos if their masses are inside a 0.1 − 100 MeV window. Assuming a near-future galactic supernova explosion, we estimate the sensitivity of several present and near-future experiments, including Fermi-LAT, e-ASTROGAM, DUNE, and Hyper-Kamiokande, to magnetic-moment-coupled sterile neutrinos. We also study the diffuse photon and neutrino fluxes produced in the decay of magneticmoment coupled sterile neutrinos produced in all past supernova explosions and find that the absence of these decay daughters yields the strongest constraints to date for sterile neutrino masses inside a 1 − 100 keV window

Speaker: Ying-Ying Li (USTC)

WIN2023.pdf

17:50 Recent results from Daya Bay

Utilizing powerful nuclear reactors as anti-neutrino sources, high mountains to provide ample shielding from cosmic rays in the vicinity, and functionally identical detectors with large target volume for near-far relative measurement, the Daya Bay Reactor Neutrino Experiment has achieved unprecedented precision in measuring the neutrino mixing angle $\theta_{13}$ and the neutrino mass squared difference $|\Delta m^2_{ee} |$. I will report the latest Daya Bay results on neutrino oscillations and the evolution of the reactor antineutrino flux and spectrum.

Speaker: Prof. Ming-chung Chu (The Chinese University of Hong Kong)

chu_Win23.pdf

19:00 → 22:00 Banquet

Saturday, 8 July

08:30 → 10:30 Summary Talks 1

Convener: Shao-Feng Ge (SJTU)

08:30 Electroweak Interactions Summary

Speaker: Gang Li (Peking Univ., SYSU)

EW_summary.pdf

09:00 Neutrino Physics Summary

Speaker: Wei Wang (Sun Yat-Sen University)

neutrino_summary_all.pptx

09:30 Flavour & Precision Physics Summary

Speaker: Wenbin QIAN (University of Chinese Academy of Sciences)

FTSummary_Wenbin_Qian.pdf

10:00 Astro-particle Physics & Cosmology Summary

Speaker: Zhao-Huan Yu (Institute of High Energy Physics, CAS)

YuZH_AstroCosmo_sum.pdf

10:30 → 11:00 Coffee break

11:00 → 12:20 Summary Talks 2

Convener: Yuehuan Wei (Sun Yat-sen University)

11:00 Applications of Nuclear Technology Summary

Speaker: Zhe Wang (Tsinghua University)

Summary - Zhe Wang.pdf

Summary - Zhe Wang.pptx

11:30 Present the Best Poster Award and have the award recipients give presentations.

Speakers: Yilin Wang (高能所) , Tao Li (Sun Yat-Sen (Zhongshan) University) , Shaoping Li (IHEP)

2023WIN-YLW.pdf

Best Poster Award_presentation_litao.pdf

Slice_20230708105227_shaoping_li.pdf

WIN2023 Poster Contest Winners.pptx

12:10 Next WIN (remote)

Speaker: Prof. Anatael CABRERA (IN2P3/CNRS -- APC Laboratory (Paris, France))

WIN2025-talk@WIN2023-July2023-Anatael.pdf

12:20 → 14:00 Lunch