第七届强子谱和强子结构研讨会

Name: 第七届强子谱和强子结构研讨会
Start: 2024-04-26T08:00:00+08:00
End: 2024-04-30T20:20:00+08:00
Location: No location set

26 Apr 2024, 08:00 → 30 Apr 2024, 20:20 Asia/Shanghai

电子科技大学清水河校区西门外阳光(成都)国际会议中心

Description

虽然传统夸克模型可以成功解释大部分的强子性质。但自2003年实验发现Ds0*(2317)和X(3872)粒子以来，越来越多的新强子态被BaBar、Belle、BESIII、LHCb等实验发现。这些新强子态表现出不同于传统夸克模型预言的行为和性质，它们的出现为强子谱和强子结构的研究提出新的挑战，同时也带来了新的机遇。

为促进国内强子谱和强子结构研究的交流和进一步发展，从2016年起，“强子谱和强子结构研讨会”在国内同行的大力支持下相继在西安交通大学（第一届）、郑州大学（第二届）、内蒙古大学（第三届）、中国科学院近代物理研究所（第四届）、中山大学（第五届）和中国科学院大学（第六届）成功举办。和部分专家商讨后决定，第七届会议在2024年4月26-30日于电子科技大学清水河校区举办。本次会议由电子科技大学主办，重庆大学、四川大学协办。本次会议得到国家自然科学基金理论物理专款“西南理论物理中心”项目的资助。

本系列研讨会的主题为交流强子谱和强子结构方面研究新进展，旨在推动国内从事强子物理及相关研究人员的交流，探讨该领域的前沿课题，促进同行之间开展实质性合作。

会议网址：https://indico.itp.ac.cn/event/200/overview，注册截止时间4月1日，报告提交截止时间为4月1日。本会议食宿统一安排，费用自理。会议收取注册费，老师和博士后，1500元/人，学生1000元/人。

会议地方组织委员会（按姓氏拼音顺序排名）:
杜孟林（电子科技大学）、龙炳蔚（四川大学）、吴兴刚（重庆大学）、杨智（电子科技大学）、郑汉青（四川大学）、郑绪昌（重庆大学）

会议顾问委员会（按姓氏拼音顺序排名）:
陈莹（中国科学院高能物理研究所）、董宇兵（中国科学院高能物理研究所）、耿立升（北京航空航天大学）、高原宁（北京大学）、李学潜（南开大学）、刘翔（兰州大学），刘川（北京大学）、马伯强（北京大学）、马建平（中国科学院理论物理研究所）、乔从丰（中国科学院大学）、沈肖雁（中国科学院高能物理研究所）、许怒（中国科学院近代物理研究所）、苑长征（中国科学院高能物理研究所）、赵光达（北京大学）、赵强（中国科学院高能物理研究所）、赵政国（中国科学技术大学）、张肇西（中国科学院理论物理研究所）、郑阳恒（中国科学院大学）、朱世琳（北京大学）、邹冰松（清华大学）

会议联系人：

曾星月 xinyue@uestc.edu.cn

杨智 zhiyang@uestc.edu.cn

杜孟林 du.ml@uestc.edu.cn

交通：

本次会议地点为电子科技大学清水河校区西门外的阳光成都国际会议中心。

如果乘坐高铁到成都东站，可乘坐地铁前往成都西站，再转乘电车到会议地点，或者直接打车前往；

如果乘坐飞机（温馨提示：天府机场离会场很远，强烈建议选择到双流机场），可乘坐地铁前往成都西站，再转乘电车，或者直接打车到会议地点。会议地点离双流机场约25公里，打车最快半小时到达；离天府机场约87公里，打车最快一小时到达。

注：如果提交摘要时出现报错[forbidden(403)]，请尝试去掉LaTeX公式，或者去掉$$符号。

Participants

Bing Wu
Bo-Qiang Ma
Chang Gong
Chen Chen
Chun-Gui Duan
Dandan Cheng
Di Ben
Fei Huang
Gang Li
GuangJuan Wang
Hai-Bing Fu
Hai-Qing Zhou
Hailong Fu
Hang Liu
Hong-Fei Shen
Hong-Fei Zhang
Hong-Hao Ma
Hua Zhou
Hua-Xing Chen
Hui-Yu Xing
jiajun xie
Jian-Yu Zhang
Jianbin Jiao
Jianyong Zhang
jifeng hu
Jun Zeng
Junhao Yin
Junxu Lu
Kai Yi
Kaiji XIe
Kan Chen
Kang Yu
Lianrong DAI
Liupan An
Ming-Zhu Liu
Pei-Rong Li
Qi Huang
Qi-Nan Wang
Qian Wang
Qing Yu
Qingnian Xu
Rong-Gang Ping
Shun (顺) Wang (王)
Tang Lin
Tao Zhong
Wang Ya Jun
Wei Chen
Wei Hao
Wei 威 Li 李
Xi-Jie Zhan
Xiao-Lin Wang
Xiao-Rui Lyu
Xing-Gang Wu
Xining Wang
Xinyue Hu
Xu Feng
Xu Zhang
Xue jie Liu
Yang Yu
Yang Yu
Yangheng Zheng
Ye Cao
Yi-Bo Yang
Yin Cheng
Ying Zhang
Yingchao Xu
Yixiong Zhou
Yiyao Li
Yushan Ren
Yutie Liang
Zhe Zhang
Zhen-Hua（振华） Zhang（张）
Zhen-Yang(振洋) Wang(王)
Zhenhong Wu
Zhi-Hui Guo
Zhiguo Wang
zhihui wang
Zhong-Yu Wang
Zi-Heng Yang
Zuxin Cai
世琳朱
丙新张
丹郭
书磊张
亮亮刘
佩莲李
佳俊吴
俊璋王
俞洁晟
倩刘
倩邓
倩倩郭
元鑫郑
全兴叶
军蒋
冰松邹
剑梁
剑波程
力马
力成盛
博言崔
双涛王
名声刘
国利王
夏卿李
天伟吴
天博刘
太傅冯
奉坤郭
如辉倪
娟娟牛
学文陈
宇兵（Yubing）董（Dong）
宇慧周
宇航贾
宋林庆
家伟张
小妹唐
广朝何
建明申
张宇滨
张振宇
强李
德民李
德良姚
志轩李
志鑫李
思威刘
思学秦
恒李
恩王
悦谭
慧华钟
成平沈
成荣邓
敬娟祁
文慧张
文源柯
旺季
晓卫白
晓海刘
晔颜
智杨
朝峰刘
柏林黄
柳明刘
梁志彪
梓萱马
梦园代
森贾
楮文肖
波王
泽锐梁
海军王
涛郭
清华沈
澳李
炜洁张
燎原董
现伟康
琦李
瑞祥史
益益芮
祥魏
福升于
秉然何
科盛孙
绪昌郑
耀余
聚军谢
至勇王
茂俊严
虹霞黄
蜀明吴
衢智李
裴苏岩
言锐刘
诚陈
豪杰景
金林傅
金葆王
金钰霍
钦松周
锐陈
雄辉曹
雅兰黄
雨孟
雨月崔
雨衡吴
雪王
风萧刘
骏杰刘
鹏宇牛
鹏棋王
齐放吕
龙斌陈

曾星月

xinyue@uestc.edu.cn

Friday, 26 April
- 10:00 → 22:00
  
  注册报到
- 18:00 → 19:00
  
  晚餐
Saturday, 27 April
- 08:30 → 08:40
  
  致辞
- 08:40 → 09:00
  
  合影
- 09:00 → 09:25
  
  Overview of Bell and Bell II results 25m
  
  Overview of Bell and Bell II results
  
  Speaker: Prof. 成平沈
  
  1沈成平.pdf
- 09:25 → 09:50
  
  Heavy flavor spectroscopy study at LHCb 25m
  
  Studies on the spectroscopy of hadrons containing heavy quark(s) can deepen our understanding of the internal structure and dynamics of hadrons, thus improving our knowledge on the strong interaction, which is largely limited due to the non-perturbative behavior of Quantum Chromodynamics at low-energy regime. The discovery of a series of exotic heavy hadrons containing more than three valence quarks in the last decades has reinforced its importance. The LHCb experiment has been making significant contributions to such studies thanks to the large dataset provided by LHC and the delicate design of the detector. In this talk, a review of the heavy flavor spectroscopy study at LHCb will be presented.
  
  Speaker: 刘攀安 (北京大学)
  
  LHCbSpectroscopy_20240427.pdf
- 09:50 → 10:15
  
  Highlights of BESIII experiment 25m
  
  Highlights of BESIII experiment
  
  Speaker: Prof. 培荣李
  
  3李培荣Highlights of BESIII experiments.pdf
- 10:15 → 10:35
  
  茶歇
- 10:35 → 11:00
  
  格点QCD上的强子谱与强子结构 25m
  
  我将介绍我们基于CLQCD组态上的夸克质量标定和强子能谱计算的进展，并概述近期国内在强子结构方面的格点QCD计算。
  
  Speaker: Yi-Bo Yang (ITP/CAS)
  
  4杨一玻2024.04.27.pdf
- 11:00 → 11:25
  
  Status and prospect of electron ion collider in China 25m
  
  核子（质子和中子的总称）大约占宇宙中可见物质总质量的99%。作为构成宇宙可见物质中的最主要成分,核子也是研究强相互作用, 尤其是禁闭区非微扰QCD的重要实验室。电子-离子对撞机(Electron Ion Collider, EIC)，被称作当代卢瑟福散射实验，是人类认识物质世界深层次结构，特别是核子结构的理想工具。中国极化电子离子对撞机项目设想在已开建的强流重离子加速器HIAF高能离子束的基础上升级建造中国电子-离子对撞机（EIC in China, EicC），为我国核物理与强子物理以及相关科学领域提供大型综合实验平台。在本报告中，我将主要介绍EicC重要物理亮点与探测器设计，并汇报项目进展。
  
  Speaker: Dr Yutie Liang (Institute of Modern Physics, CAS)
  
  5梁羽铁EicC_talk-0427.pptx
- 11:25 → 11:50
  
  四夸克态粒子在高能和B介子衰变中的产生 25m
  
  Speaker: Prof. 福升于
  
  6于福升.pdf
- 11:50 → 12:15
  
  The Progress of Super Tau-Charm Facility (STCF) in China 25m
  
  Speaker: 剑宇张
  
  7张剑宇2024-04-27 STCF introduction.pdf
- 12:15 → 13:15
  
  午餐
- 14:00 → 15:20
  分会场 1
  - 14:00
    
    Productions of XYZ states in B decay 20m
    
    waiting
    
    Speaker: Ming-Zhu Liu (Lanzhou University)
    
    强子谱-成都-刘明珠.pdf
  - 14:20
    
    Axion production in $ \eta \to \pi \pi a $ decay 20m
    
    The axion-like particle (ALP) production from the $\eta \to \pi \pi a$ decay is studied within the SU(3) chiral perturbation theory up to one-loop level. The unitarized decay amplitudes are also constructed to take into account the $\pi\pi$ final-state interactions. Detail analyses between the perturbative amplitudes and the unitarized ones are given in the phenomenological discussions. By taking the values of the chiral low energy constants in literature, we predict the Dalitz distributions, the spectra of the $\pi\pi$ and $a\pi$ systems, and also the branching ratios of the $\eta\to\pi\pi a$ process by varying $m_a$ from zero to $m_{\eta}-2m_{\pi}$.
    
    Speaker: 金葆王 (东南大学)
    
    slide-WangJinbao.pdf slide-WangJinbao.pptx
  - 14:40
    
    Partial wave effects in the heavy quarkonium radiative electromagnetic decays 20m
    
    In a previous paper, it was pointed out that the wave functions of all particles are not pure waves, besides the main partial waves, they all contain other partial waves. It is very interesting to know what role these different partial waves play in particle transitions. Therefore, by using the Bethe-Salpeter equation method, we study the radiative electromagnetic decays $\psi\rightarrow\gamma\chi_{_{cJ}}$ and $\Upsilon\rightarrow\gamma\chi_{_{bJ}}$ ($J=0,1,2$). We find that for the $S$ and $P$ wave dominated states, like the $\psi(2S)$, $\Upsilon(2S)$, $\chi_{_{cJ}}(1P)$, and $\chi_{_{bJ}}(1P)$ etc., the dominant $S$ and $P$ waves provide main and nonrelativistic contrition to the decays; other partial waves mainly contribute to the relativistic correction. For the states like the $\psi(1D)$, $\Upsilon(2D)$, $\chi_{c2}(1F)$, and $\chi_{b2}(1F)$ etc., they are the $S-P-D$ mixing state dominated by $D$ wave or the $P-D-F$ mixing state dominated by $F$ wave. Large decay widths are found in the transitions $\psi(2D)\to \chi_{c2}(1F)$, $\Upsilon(1D)\to \chi_{bJ}(1P)$, and $\Upsilon(2D)\to \chi_{bJ}(2P)$ etc., which may be helpful to study the missing states $\chi_{c2}(1F)$, $\Upsilon(1D)$, and $\Upsilon(2D)$.
    
    Speaker: Pei Su-yan (河北省量子场论精细计算与应用重点实验室)
    
    PSY.pdf
  - 15:00
    
    Exclusive photoproduction of heavy vector mesons 20m
    
    Exclusive photoproduction of heavy vector mesons from the proton is widely assumed to proceed via mechanisms that are sensitive to glue physics in the target proton. It was once thought that vector meson dominance could be used to relate this photoproduction process to the in-proton expectation value of the trace anomaly in quantum chromodynamics (QCD); hence, to deliver insights into the character of emergent hadron mass. That is now known to be false. Nevertheless, some consider that it may still be possible to interpret near-threshold heavy meson production using generalised parton distributions (GPDs) and therewith gain access to in-proton gluon gravitational form factors. There are arguments to the contrary, however. Using continuum Schwinger function methods, we show that it is possible to unify all J/psi photoproduction data, from threshold to very high energy, using a fully-dressed photon-to-quark+quark-to-J/psi transition amplitude, in which the dressed quarks communicate with their proton counterparts via Pomeron exchange. This being the case, then any interpretation of threshold J/psi production in terms of a proton mass radius is tenuous.
    
    Speaker: Mr Lin Tang (Nanjing University)
    
    Vector meson photoroduction-UESTC.pptx
- 14:00 → 15:20
  分会场 2
  - 14:00
    
    $\Lambda_c^+$ Electromagnetic Form Factors 20m
    
    We have investigated the electromagnetic form factors of charmed $\Lambda_c^+$ baryon and the total cross sections of the $𝑒^+𝑒^− \to 𝛬^+_c \bar{\Lambda}_c^-$ reaction within the extended vector meson dominance model. By including the charmonium-like states 𝜓(4500), 𝜓(4660), 𝜓(4790), and the possible 𝜓(4900) state, the current experimental data can be well reproduced.
    
    Speaker: Cheng Chen (中国科学院近代物理研究所)
    
    1.LambdacEMFs-成都.pptx
  - 14:20
    
    Investigating excited Omega_c states from pentaquark perspective 20m
    
    Inspired by the recent observation of new \Omega_c states by the LHCb Collaboration, we explore the excited Omega_c states from the pentaquark perspective in the quark delocalization color screening model. Our results indicate that the \Omega_c(3185) can be well interpreted as a molecular \Xi D predominated resonance state with J^P = 1/2^−. The \Omega_c(3120) can also be interpreted as a molecular \Xi_c^ \bar{K} state with J^P = 3/2^− and a new molecular state \Xi_c^ \bar{K}^* with J^P = 5/2^− and a mass of 3526 MeV is predicted, which is worth searching in the future. Other reported \Omega_c states cannot be well described in the framework of pentaquark systems in the present work. The three-quark excited state or the unquenched picture may be a good explanation,which is worth further exploration.
    
    Speaker: 晔颜 (南京师范大学)
    
    2.电子科大第七届强子谱和强子结构研讨会 Ye Yan.pdf
  - 14:40
    
    Pion Boer-Mulders function 20m
    
    The leading-twist transverse momentum dependent distribution functions (TMDs) of the Pion, the unpolarized TMD and the transversely polarized Boer-Mulders function, were predicted by using a symmetry-preserving contact interaction (SCI) based on Dyson-Schwinger equations (DSEs). To account for the non-zero Boer-Mulders function, arising from the final state interaction between the quark and antiquark, one gluon exchange approximation was employed. The calculations were completed by using both Feynman diagram and pion light front wave functions. Finally, the comparison of different model calculations was performed accompanied by a discussion on the model-independent positivity relation constraining unpolrized TMD and Boer-Mulders function.
    
    Speaker: Dandan Cheng
    
    3.pptx
  - 15:00
    
    Further study of c\bar{c}c\bar{c} system within a chiral quark model 20m
    
    Inspired by the recent ATLAS and CMS experiments on the invariant mass spectrum of J/\psi J/\psi, we systematically study the c\bar{c}c\bar{c} system of J^{P}=0^{+}. In the framework of chiral quark model, we have carried out bound-state calculation and resonance-state calculation respectively by using Real-scaling method. The results of bound-state calculation show that there are no bound states in the c\bar{c}c\bar{c} with 0^{+} system. The resonance-state calculation shows that there are four possible stable resonances: R(6920), R(7000), R(7080) and R(7160). R(6920) and R(7160) are experimental candidates for X(6900) and X(7200), whose main decay channel is J/\psi J/\psi. It is important to note that the another major decay channel of R(7160) is \chi_{c0} \chi_{c0} , and the \chi_{c0} \chi_{c0} is also the main decay channel of R(7000), R(7080). Therefore, we propose to search experimentally for these two predicted resonances in the \chi_{c0} \chi_{c0} invariant mass spectrum.
    
    Speaker: 雨衡吴 (南京师范大学)
    
    4wuyuheng.pdf
- 15:20 → 15:50
  
  茶歇
- 15:50 → 17:30
  分会场 1
  - 15:50
    
    Exporing Hexaquarks states from lattice QCD 20m
    
    Speaker: 金鑫谭
    
    第七届强子谱强子结构谭金鑫.pdf
  - 16:10
    
    Developing predictions for pion fragmentation functions 20m
    
    Exploiting crossing symmetry, the pion valence quark distribution function (DF) is used to predict the pion fragmentation function (FF). In this way, a unified treatment of the pion DFs and FFs was accomplished. The significance of this work lies in that it is the first prediction of FFs in any approach with a traceable connection to quantum chromodynamics (QCD), and it also gives insights into the link between two fundamental phenomena in QCD: Emergent Hadron Mass (EHM) and confinement.
    
    Speaker: 惠瑜邢 (Nanjing University)
    
    FF-电子科大.pptx
  - 16:30
    
    The identification of the new state Y(3872) as the P-wave D\bar{D}^*/\bar{D}D^* resonance 20m
    
    The BESIII Collaboration recently observed a new charmonium-like vector state Y(3872) in e^+e^-\rightarrow D\bar{D}^, which should be the first P-wave D\bar{D}^ molecular resonance. The experimental and theoretical identification of the P-wave dimeson state holds paramount importance in enhancing our comprehension of the non-perturbative QCD and few-body physics. Its existence is firmly established in a unified meson-exchange model which simultaneously depicts the features of the \chi_{c1}(3872), Z_c(3900) and T_{cc}(3875). This scenario can be directly examined in the e^+e^-\rightarrow D\bar{D}^/\bar{D}D^ cross section to see whether a resonance exists at the threshold. The credibility of the investigations is also ensured by the fact that the P-wave interaction dominantly arises from the well-known long-range pion exchange. Additionally, the existence of the P-wave resonance only depends on the interaction strength and is less sensitive to the potential shapes. We extensively calculate all systems up to P-wave with various quantum numbers and predict a dense population of the D\bar{D}^/\bar{D}{D}^ and DD^ states, where the S-wave D\bar{D}^/\bar{D}{D}^ state with I^G (J^{PC})=0^- (1^{+-}), P-wave $D\bar{D}^/\bar{D}{D}^ state with I^G(J^{PC})=0^+(0^{-+}), and P-wave DD^ state with I(J^P)=0(0^-) are more likely to be observed in experiments.
    
    Speaker: Dr 王俊璋 Wang (Peking university)
    
    强子谱与强子结构研讨会-王俊璋-北京大学.pdf
  - 16:50
    
    Rethinking the molecular a1(1420) and its partners in low lying axial-vector meson spectrum 20m
    
    In this talk, I will present our recent study on the low lying axial-vector meson spectrum, which is an extention of our study on eta1(1855).
    
    Speaker: Dr 茂俊严
    
    第七届强子谱强子结构-严茂俊.pdf
  - 17:10
    
    Unified unquenched quark model for heavy-light mesons with chiral dynamics 20m
    
    We propose an unquenched quark model for describing the heavy-light mesons by taking into account the coupled-channel effects induced by chiral dynamics. After including a relativistic correction term for the strong transition amplitudes, both the mass spectra and decay widths of the observed heavy-light mesons can be successfully described simultaneously in a unified framework, several long-standing puzzles related to the small masses and broad widths are overcome naturally. We also provide valuable guidance in searching new heavy-light mesons by the detailed predictions of their masses, widths, and branching ratios.
    
    Speaker: Mr 倪如辉 (Hunan Normal University)
    
    Unified unquenched quark model for heavy-light mesons with chiral dynamics.pdf
- 15:50 → 17:30
  分会场 2
  - 15:50
    
    J/Psi N scattering length 20m
    
    In this presentation, I will show our recent results on calculating the gluon-exchange contribution to the $J/\Psi N$ scattering length via dispersion relations. Additionally, I will compare these results with others to facilitate further discussion.
    
    Speaker: Mr Bing Wu (Institute of Theoretical Physics, Chinese Academy of Sciences)
    
    JpsiN scattering length.pdf
  - 16:10
    
    Study on the non-trivial spectra of $\eta(1405/1475)$ decay 20m
    
    We study the latest non-trivial resonant line-shape of $\eta(1405 /1475)$ in the $K \bar{K}\pi$ invariant mass spectrum measured by the BESIII. The possible existence of two isoscalar pseudoscalars around 1.4 ~1.5 GeV is in contradiction with the nonet structure in the SU(3) flavor symmetry. Nevertheless, the glueball assignment of the outnumbering state is not favored by the Lattice QCD calculations. Trying to make the minimum assumptions based on the radial excitation picture, and taking into account the open channel effects in the decays of $\eta(1405/ 1475)\to K\bar{K}\pi$, such as the intermediate $K^*\bar{K}+c.c.$, $a_0 \pi$, and $\kappa \bar{K}+c.c.$ channels, as well as the interference with $\eta(1295)$ and the non-resonant contributions, we can describe this non-trivial $K\bar{K}\pi$ spectrum with a set of reasonable parameters and without the introduction of an additional new state. Not only the total three-body and two-body spectra are fitted well, but also the shifted resonant line-shape of different partial waves of $K\bar{K}\pi$ decay. And with our best fitted parameters, we also have a good description on the $\eta \pi \pi $ spectrum. The mass of $\eta(1405)$ is fitted as 1.43 GeV, which is consistent with the peak positions in the $\gamma V$ spectra.
    
    Speaker: Dr Yin Cheng (Institution of theoretical physics)
    
    2.24_4_26__Eta1405.pptx
  - 16:30
    
    Hidden charmonium decays of spin-2 partner of X(3872) 20m
    
    In this work, we investigated in detail the widths of the $X_2$ decaying to $J/ \psi V$ ($V = \rho^0\,,\omega$) and to $\eta_cP$ ($P = \pi^0\,,\eta\,,\eta'$) using the effective Lagrangian approach. In calculations, we assume the $X_2$ as a molecular state of the $D^{*0}\bar{D}^{*0} $ and $D^{*+}D^{*-}$ with equal proportion. Moreover, we only consider the contributions from the triangle hadron loops made of the charmed mesons $D^{(*)}$ and $\bar{D}^*$.We found that the processes $X_2\to J/\psi \rho^0$ and $\eta_c\pi^0$ are both isospin breaking, while the processes $X_2\to J/\psi \omega$ and $\eta_c\eta$ ($\eta'$) are of isospin conservation. We also investigated the dependence of the ratios between these widths on the $X_2$ mass and on the $\eta$-$\eta'$ mixing angle, which may be good quantities for experiments. We hope that these calculation results would be checked experimentally in the future.
    
    Speaker: Yuanxin Zheng (Qufu Normal University)
    
    3.郑元鑫-ppt-X2.pdf
  - 16:50
    
    The study on three-body systems \eta K^* \bar{K}^*, \pi K^* \bar{K}^* and K K^* \bar{K}^*by Faddeev fixed-center approximation. 20m
    
    We study three-body systems \eta K^ \bar{K}^, \pi K^ \bar{K}^ and K K^ \bar{K}^ by Faddeev fixed-center approximation. Under fixed-center approximation framework, we can view a three-body system as a cluster which is generated by two particles in system and the third particle, where we view K^ \bar{K}^cluster as f_0(1710), a_0(1710) and f_2’(1525), respectively, and scatter \eta, \pi and K on K^ \bar{K}^. In module squared amplitude of three-body systems, we find \eta(2100) , \pi(2070) and \eta_2(1780) for \eta K^ \bar{K}^, \eta(2100), \pi(2070) and \pi _2(1880) for \pi K^ \bar{K}^ and several new states for K K^ \bar{K}^. Our results offer some new views for some further states and exotic states.
    
    Speaker: Mr Qing-Hua Shen (Institute of Modern Physics, Chinese Academy of Sciences)
    
    4.report-沈清华.pdf
  - 17:10
    
    CMS 实验Jpsijpsi结构及其自旋宇称测量准备 20m
    
    Speaker: 晰宁王
    
    5.pptx
- 18:10 → 19:10
  
  晚宴
Sunday, 28 April
- 08:00 → 18:00
  
  自由讨论
Monday, 29 April
- 08:30 → 08:50
  
  FDC分波分析软件和BESIII重子激发态的研究 20m
  
  BESIII上已采集了大量的粲偶素衰变事例，包括100亿的J/psi和30亿的psi(3686). 它们衰变中产生大量的重子激发态，成为研究核子激发态和超子激发态的重要场所。报告将介绍费曼图自动计算（FDC）分波系统软件的GPU开发最新进展，和在重子激发态实验研究中的具体运用。
  
  Speaker: Ronggang Ping (IHEP)
  
  pingrg.pdf
- 08:50 → 09:10
  
  Cross-Channel Constraints on Resonant Antikaon-Nucleon Scattering 20m
  
  Cross-Channel Constraints on Resonant Antikaon-Nucleon Scattering
  
  Speaker: Dr 俊旭陆
  
  2 陆俊旭CoMB-CN-成都.pptx
- 09:10 → 09:30
  
  X(3872) Relevant D\bar{D}^* Scattering in $N_f=2$ Lattice QCD 20m
  
  We study the S-wave D\bar{D}^(I=0) scattering at four different pion masses m_\pi ranging from 250 MeV to 417 MeV from N_f=2 lattice QCD. A bound state near the D\bar{D}^ threshold likely exists even after considering the possible left-hand cut effect due to the one pion exchange interaction. At m_\pi\approx 417 MeV where the effective range expansion is valid, the compositeness of the bound state is X\approx 1 and indicates a predominant D\bar{D}^* component. This state may correspond to X(3872). On the other hand, our results of the finite volume energies also hint at the existence of a 1^{++} resonance below 4.0 GeV.
  
  Speaker: Mr Chunjiang Shi (CAS, IHEP)
  
  3 shichunjiang施春江.pdf
- 09:30 → 09:50
  
  New insight into the exotic states strongly coupled with the $D\bar{D}^*$ from the $T^+_{cc}$ 20m
  
  New insight into the exotic states strongly coupled with the
  $D\bar{D}^*$ from the $T^+_{cc}$
  
  Speaker: Dr GuangJuan Wang
  
  4 强子物理论坛_wgj.pdf
- 09:50 → 10:10
  
  Lattice calculation of Ds* radiative decay width 20m
  
  We perform a lattice calculation on the radiative decay of $D_s^*$ using the (2+1) Wilson-Clover gauge ensembles generated by CLQCD collaboration. The radiative transition $D_s^*\rightarrow D_s\gamma$ and Dalitz decay $D_s^*\rightarrow D_s e^+e^-$ are studied respectively. After a continuous extrapolation under three lattice spacings, we finally obtain these decay widths with much reduced errors compared to previous study. A poorly-known decay width of $D_s^*$ is also determined precisely taking into account the the experimental branching fraction.
  
  Speaker: Yu Meng (Zhengzhou University)
  
  5 YuMeng.pdf
- 10:10 → 10:30
  
  茶歇
- 10:30 → 10:50
  
  Y(10753)的实验分析 20m
  
  Y(10753)的实验分析
  
  Speaker: Dr Junhao Yin (Nankai University)
  
  Y(10753) measurements-cd.pdf
- 10:50 → 11:10
  
  Study of the tetraquark states 20m
  
  In the present work, we use the coupled channel formalism to investigate the mass spectrum of the tetraquark states. Starting from the local hidden gauge symmetry and considering the t- and u-channels, the two-body interaction potentials are evaluated, and then, the scattering amplitude is calculated with the coupled channel Bethe-Salpeter equation, where one can look for the resonance pole in the second Riemann sheet. In the heavy sector with strangeness, some results for the molecular states are shown.
  
  Speaker: 楮文肖 (广西师范大学)
  
  tetraquark_XiaoCW.pptx
- 11:10 → 11:30
  
  Theoretical study of the low-lying excited baryons 20m
  
  Theoretical study of the low-lying excited baryons
  
  Speaker: En Wang (Zhengzhou University)
  
  3 202404-王恩-成都.pdf
- 11:30 → 11:50
  
  Octet baryon and heavy meson interaction in chiral effective field theory 20m
  
  Studies into baryon-meson interactions reveal significant insights into quantum chromodynamcis (QCD) at hadronic scales, forming a critical foundation for advancing hadron spectroscopy. We calculate the effective potentials of octet baryon and heavy meson systems using the chiral effective field theory up to the next-to-leading order. The low energy constants (LECs) are correlated with those of the \bar{N}N interaction using a quark-level Lagrangian approach. Our research provides new insights into several near-threshold charmed baryons [e.g., \Lambda_{c}(2940), \Xi_{c}(3055), and \Omega_{c}(3188), etc.] around 3 GeV from the hadronic molecular perspective. We also identify several molecular states, designated as \Xi_{c}, within the mass range of 3100-3500 MeV.
  
  Speaker: 柏林黄 (内蒙古大学)
  
  4 Octet baryon and heavy meson interaction in chiral effective field theory.pdf
- 11:50 → 12:10
  
  Revisiting O(N) σ model at unphysical pion masses and high temperatures 20m
  
  Roy-equation analyses on lattice data of ππ scattering phase shifts at mπ = 391MeV reveals
  that the lowest f0 meson becomes a bound state under this condition. In addition, there is a pair
  of complex poles below threshold generated by crossing symmetry [1]. We use the N/D method
  to partially recover crossing symmetry of the O(N ) σ model amplitude at leading order of 1/N
  expansion, and qualitatively reproduce the pole structure and pole trajectories with varying pion
  masses as revealed by Roy-equation analyses. The σ pole trajectory with varying temperature is also
  discussed and found to be similar to its properties when varying mπ . As the temperature increases,
  the complex σ poles firstly move from the second Riemann sheet to the real axis becoming two
  virtual state poles, and then one virtual state pole moves to the first sheet turning into a bound
  state pole and finally tends to the pion pole position at high temperature which is as expected
  from the chiral symmetry restoration. Our results provide further evidences that the lowest f0 state
  extracted from experiments and lattice data plays the role of σ meson in the spontaneous breaking
  of chiral symmetry. Finally, we also briefly discuss the problems of the effective potential in the
  situation when mπ and temperature get large.
  
  Speaker: 衢智李 (Shanghai Jiao Tong University)
  
  5 ON_PPT.pdf
- 12:10 → 13:10
  
  午餐
- 14:00 → 14:20
  
  具有隐藏定域对称性的夸克模型及其在强子谱学中的应用 20m
  
  We propose a chiral quark model that incorporates vector mesons and apply it to the study of the hadron spectrum. We consider the contributions of vector mesons within the framework of hidden local symmetry. Our results demonstrate a significant improvement in the masses of ground state baryons, including the nucleon, $\Lambda_c$, and $\Lambda_b$. We successfully reproduce the masses of all 45 experimentally confirmed ground states of mesons and baryons. Furthermore, our predictions for 21 ground states align well with the results obtained from lattice QCD analyses. This work represents the first successful achievement of all 45+21 ground states of mesons and baryons using a single set of parameters.
  
  Speaker: 秉然何
  
  1 何秉然_20240429_HLS夸克模型_成都.pdf
- 14:20 → 14:40
  
  The relativistic three-body scattering and the D^0D^{*+}-D^+D^{*0} system 20m
  
  Scattering amplitudes involving three-particle scattering processes are investigated within the isobar approximation which respects constraints from two- and three-body unitarity. The particular system considered is the D^0D^{+}-D^+D^{0}, where the D^{+}~(D^{0}) enters as a p-wave D^+\pi^0 or D^0\pi^+~(D^0\pi^0 or D^+\pi^-) resonance. The interaction potentials in the coupled-channel D^0D^{+}-D^+D^{0} system contain the \sigma, \rho, \omega and \pi-exchange. The analytic continuation of the amplitudes across the three-body unitary cuts is investigated to search for poles on the unphysical Riemann sheets. Associated with an unstable particle D^{+}~(D^{0}) is a complex
  two-body unitarity cut, through which one can further analytically continue into another unphysical Riemann sheet. Dynamical singularities emerged from the $\pi$-exchange potential are stressed. The pole generated from the D^0D^{+}-D^+D^{0} interaction and its line shape in D^0D^0\pi^+ break-up production are in agreement with double-charmed tetraquark T_{cc}^+ observed by the LHCb Collaboration.
  
  Speaker: Mr Xu Zhang (Institute of Theoretical Physics, Chinese Academy of Sciences)
  
  xuzhang_0429.pdf
- 14:40 → 15:00
  
  Light scalar mesons in semileptonic decay of charm meson at BESIII 20m
  
  The nontrivial quark structure of light scalar mesons f0(500), f0(980) and a0(980) remains controversial for many years. In passed years, BESIII studied them via several semileptonic D decays (D0->a0(980)- e+nu, D+ -> a0(980)0 e+nu, Ds+ -> a0(980)0 e+nu, D+ -> f0(500)/f0(980)e+nu, D+ -> f0(500)mu+nu, Ds+ -> f0(500)/f0(980)e+nu). Especially, the measurement of D -> f0/a0 form factor could shed light on the nature of them. In this talk, I will review all studies about light scalar mesons via semileptonic D decays at BESIII. A short outlook would be given based on BESIII new data in the future.
  
  Speaker: Prof. Shulei (书磊) Zhang (张) (Hunan University (湖南大学))
  
  SLDdecay@BESIII_zhangshulei_2024Apr29.pdf
- 15:00 → 15:20
  
  Nucleon electroweak elastic and transition form factors 20m
  
  Nucleon properties are largely determined by the strong interaction; and a central aim of on-going experimental and theoretical efforts is to understand their structure as composite objects made of three valence light quarks. Electron+nucleon scattering is a well developed experimental technique in such studies and it has delivered, for instance, precise measurements of nucleon electromagnetic and transition form factors. An entirely new window onto nucleon and baryon structure is opened when one uses neutrino scattering. Indeed, reliable predictions of nucleon (N) and N-to-∆(1232) electroweak form factors are crucial for understanding new-generation long-baseline neutrino oscillation experiments. Recent developments within the framework of continuum Schwinger function methods (CSMs) have enabled practitioners to deliver the first Poincaré-invariant parameter-free predictions for such form factors. Where data are available, the predictions confirm the measurements. More importantly, the results are serving as motivation for new experiments at high-luminosity facilities. This presentation will describe nucleon electroweak elastic and transition form factors. Solving QCD is a hard problem and a many-pronged approach offers the best hope for success.
  
  Speaker: 晨陈
  
  4 ChenChen_Chengdu_20240429.pdf
- 15:20 → 15:40
  
  $\boldsymbol{P}$-wave states $\boldsymbol{T^-_{bb}}$ from diquarks 20m
  
  We investigate the $P$-wave states $T^-_{bb}$ in the isospin singlet and three
  excited modes [excitation occurring in the diquark $[bb]^{s_1}_{c_1}$ ($\rho $-mode), antidiquark $[\bar{u}\bar{d}]^{s_2}_{c_2}$ ($r$-mode) or between them ($\lambda$-mode)] from diquarks in a quark model. We analyze the dynamical behaviors of the diquark $[bb]^{s_1}_{c_1}$, antidiquark $[\bar{u}\bar{d}]^{s_2}_{c_2}$ and their correlations in the states $T^-_{bb}$ by decomposing the interactions from various sources in the model. The absolute dominant color-spin configuration, more than $99\%$, in the $\rho$-mode
  with $1^1P_1$ is $[bb]^0_{\bar{\mathbf{3}}}[\bar{u}\bar{d}]^0_{\mathbf{3}}$. Its energy is lower by about $18$ MeV than the threshold $\bar{B}\bar{B}$ so that it can establish a compact bound state. The chromomagnetic and meson-exchange interactions in the antidiquark $[\bar{u}\bar{d}]^0_{\mathbf{3}}$ are responsible for its binding mechanism. Two other excited modes are higher than their respective threshold. The color configuration $\mathbf{6}\otimes \bar{\mathbf{6}}$ need to be handled discreetly in the tetraquark states.
  
  Speaker: Mr 成荣邓 (西南大学)
  
  5 邓成荣-第七届强子谱和结构大会.pdf
- 15:40 → 16:10
  
  茶歇
- 16:10 → 16:30
  
  On the photoproduction of X(3872): insights from open-charm coupled-channel mechanism 20m
  
  Hidden-charm exotic hadrons such as X(3872) can be produced through the exclusive X(3872) photoproduction. The vector meson dominance model has been commonly employed in estimating the cross sections of such processes. However, the coupled-channel production mechanism through open-charm meson-baryon intermediate states may play a crucial role. To assess the significance of such contributions, we estimate the cross section assuming the coupled-channel mechanism. For energies near the threshold, the total cross section is predicted to be of tens of nanobarns, which can be measured at future experimental facilities. Furthermore, the open-charm coupled-channel mechanism leads to a distinct line shape of the total cross section that can be utilized to reveal the production dynamics.
  
  Speaker: Xionghui Cao (Institute of Theoretical Physics)
  
  1 CaoXH_3872photoproduction.pdf
- 16:30 → 16:50
  
  Flavor-spin symmetry of the $P_c/H_c$ and $P_{cs}/H_{cs}$ molecular states 20m
  
  Based on a contact lagrangian possessing the SU(3) flavor and SU(2) spin symmetries, we discuss the symmetry properties of the interactions among the heavy flavor meson-baryon $P_c$ ([$n\bar{c}$][$nnc$]), $P_{cs}$ ([$s\bar{c}$][$nnc$] and [$n\bar{c}$][$nsc$]) systems and the baryon-baryon $H_c$ ([$nnc$][$ncc$]), $H_{cs}$ ([$nnc$][$scc$] and [$nsc$][$ncc$]) systems (with $n=u$, $d$). The light quark components of the $P_c$ ($P_{cs}$) and $H_{c}$ ($H_{cs}$) systems have identical flavors, the interactions generated from the exchanges of light mesons in the $P_c$ ($P_{cs}$) systems should be very similar to that of the $H_c$ ($H_{cs}$) systems. We perform the single-channel and multi-channel calculations on the $P_c/P_{cs}/H_c/H_{cs}$ systems and introduce the SU(3) breaking effect to identify the different mass spectra among the $P_c$ ($H_c$) and $P_{cs}$ ($H_{cs}$) systems. We suggest two kinds of evidences for the existence of the flavor-spin symmetry among the heavy flavor molecule community, i.e., the mass arrangement of the $P_c/H_c/P_{cs}/H_{cs}$ and the similar binding energies of the heavy flavor meson-baryon (baryon-baryon) systems with the same contact potentials.
  
  Speaker: kan chen (Northwest Unversity)
  
  陈侃4.292.pdf
- 16:50 → 17:10
  
  Contact interaction study of proton parton distributions 20m
  
  Using a symmetry-preserving formulation of a vector × vector contact interaction (SCI) and treating the proton as a quark + interacting-diquark bound state, whose structure is obtained by solving a Poincare covariant Faddeev equation, we provide a comprehensive, coherent set of predictions for unpolarised and polarised proton parton distribution functions (DFs): valence, glue, and four-flavour separated sea. The results enable many themes to be addressed, including: the asymmetry of antimatter in the proton; the neutron:proton structure function ratio; helicity retention in hard scattering processes; the charm quark momentum fraction; the sign and size of the polarised gluon DF; and the origin of the proton spin. In all cases where sound analyses of data are available, SCI predictions are semiquantitatively in agreement with the results. Those mismatches which exist are typically attributable to the momentum-independence of the underlying interaction. Judiciously interpreted, the SCI delivers a sound and insightful explanation of proton structure as expressed in DFs.
  
  Speaker: Yang Yu (Nanjing University)
  
  俞杨PPT(3).pptx
- 17:10 → 17:20
  
  闭幕
- 18:00 → 19:00
  
  晚餐

第七届强子谱和强子结构研讨会

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