强子物理新发展研讨会

24 Apr 2020, 08:50 → 26 Apr 2020, 18:00 Asia/Shanghai

Online

强子物理新发展研讨会（Online)

 

 

 

 

 

 

 

 

 

 

 

 

随着众多新强子的发现，强子物理进入了一个新时期，在很多方向上有许多新发展。有必要组织一次专门讨论这个议题的研讨会。本次会议由中国科学院大学、中国科学院理论物理研究所、中国科学技术大学共同主办，由中国科学技术大学承办。

会议研讨内容：

强子物理作为中高能核物理研究的重要前沿领域，其主旨是研究强子结构和性质，以及强子间相互作用。近期，随着实验数据的大量累积，其中包括我国的北京正负电子对撞机上的BESIII实验、兰州冷却储存环，欧洲核子研究中心大型强子对撞机上的LHCb、ALICE、Compass实验，美国Jefferson实验室和布鲁克海文国家实验室的RHIC、日本KEK的B工厂以及RIKEN的JPAC实验等国际重要的高能物理实验设施，强子物理实验和理论研究取得了飞速发展。另一方面，近几年随着格点计算和分析能力的迅速突破，格点QCD逐步实现与实验和相关理论工作接轨，并开始发挥强大的作用。结合中高能核物理实验，理论和格点三方面的工作成为强子物理研究未来的重要研究方向。本次研讨会旨在促进国内三方面科研工作者的交流，讨论国际上相关领域的前沿动态和发展趋势，推动国内科研队伍在相关领域的合作交流和深入研究。

会议注册：

无注册费

会议注册网址：https://indico.ihep.ac.cn/event/11349/overview

会议注册截至日期：2020年4月24日

日程安排：

2020年4月24日-26日网络会议报告

会议主办单位：

中国科学院大学，中国科学院理论物理研究所，上海理工大学，中国科学技术大学

会议组织人：

吴佳俊（中国科学院大学）

郭奉坤（中国科学院理论物理研究所）

庞锦毅（上海理工大学）

Satoshi Nakamura（中国科学技术大学）

浦实 （中国科学技术大学）

会议联系人：

浦实（中国科学技术大学），0551-63601165,  shipu@ustc.edu.cn

庞锦毅（上海理工大学）, jypang@usst.edu.cn

 

参会说明：

由于疫情期间情况特殊，本会议将采取网络会议的形式。为了保证通话质量，我们将采用 腾讯会议 软件来主持会议。会议期间您可以通过点击下方链接加入网络会议：

https://meeting.tencent.com/s/50Nxo6P8a3e4

会议 ID：399 811 654

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Friday, 24 April

08:50 → 09:00 会议开幕

09:00 → 09:45 BESIII上超子物理及其CP破坏实验研究进展

The CKM mechanism for CP violation in the Standard Model (SM) fails to explain the matter-antimatter asymmetry of the Universe by more than 10 orders-of-magnitude. This suggests that additional CP violating processes occur, and motivates aggressive searches for new, non-SM sources of CP violation. To date, CP violation in hyperon decays have never been observed. Standard Model CP violations in hyperon decays are expected to be ∼ 10^-4 to 10^-5, and any value higher than this level would be a signature of new, beyond the SM physics. Currently BESIII has collected about 10 billion J/psi decay events, the decay rate of J/psi to hyperon-anti-hyperon pairs are 10^-3, which indicates that the produced hyperon pairs will be a few millions. In this talk I will present the first observation of transverse polarization of hyperon-anti-hyperon from the e+e- --> J/psi --> hyperon-anti-hyperon pairs, which allows us to measure the decay asymmetry parameters of both hyperon and anti-hyperon, therefore CP asymmetry in the hyperon decay can be precisely obtained with 5 dimensional fit to data. We expect that the study of hyperon physics will be the next frontier of the SM CP searches.

Speaker: Prof. Hai-Bo Li (IHEP)

Slides Hyperon-BESIII-20424.pdf

09:50 → 10:35 Belle实验上奇异粲介子对系统的研究

Belle实验上奇异粲介子对系统的研究

Speaker: 森 贾 (Beihang University)

Slides Belle_report.pdf

10:40 → 11:25 The newly observered Omega(2012) as a KbarXi(1530) hadronic molecule

Recently, Belle collaboration measured the ratios of the branching fractions of the newly observed $\Omega(2012)$ excited state. They did not observe significant signals for the $\Omega(2012) \to \bar{K} \Xi^*(1530) \to \bar{K} \pi \Xi$ decay, and reported an upper limit for the ratio of the three body decay to the two body decay mode of $\Omega(2012) \to \bar{K} \Xi$. In this work, we revisit the newly observed $\Omega(2012)$ from the molecular perspective where this resonance appears to be a dynamically generated state with spin-parity $3/2^-$ from the coupled channels interactions of the $\bar{K} \Xi^*(1530)$ and $\eta \Omega$ in $s$-wave and $\bar{K} \Xi$ in $d$-wave. With the model parameters for the $d$-wave interaction, we show that the ratio of these decay fractions reported recently by the Belle collaboration can be easily accommodated.

Speaker: Prof. 聚军 谢 (中国科学院近代物理研究所)

Slides Omega(2012)-xiejujun-2020-4-24.pdf

14:30 → 15:15 Why DSEs?

Why DSEs?

Speaker: 雷 常 (Nankai University)

15:20 → 16:05 Hadron Structure on the Light-front

In this talk I will report our recent progress on the structure of light mesons, heavy quarkonia and the nucleon studied in a basis light-front approach. I will present the preliminary results on the observables such as the form factors, the parton distribution function and the generalized parton distribution functions of these systems.

Speaker: Xingbo Zhao (Iowa State University)

Slides zhaoxingbo_200424.pptx

16:10 → 16:55 Dibaryons and pentaquarks in quark models

Dibaryons and pentaquarks in quark models

Speaker: Prof. Hongxia Huang (Nanjing Normal University)

Slides HXHUANG.pdf

Saturday, 25 April

09:00 → 09:45 BESIII实验上的粲强子衰变研究

BESIII实验上的粲强子衰变研究

Speaker: Prof. Xiao-Rui Lyu (University of Chinese Academy of Sciences)

Slides Xiaorui.pdf

09:50 → 10:35 Recent results on hadron spectroscopy at LHCb

I will present several new results on observations of excited baryons at LHCb

Speaker: Liming Zhang (Tsinghua University)

Slides Liming-LHCb.pdf

10:40 → 11:25 Decay properties of molecular states

Decay properties of molecular states

Speaker: 殿勇 陈 (东南大学)

14:30 → 15:15 ssss四夸克态

本次报告准备介绍我们使用QCD求和规则研究ssss四夸克强子态的一些情况。在研究工作中，我们构造了所有可能的试探流，然后考虑了这些试探流的混合，得到的结果和相关实验进行了比较。

Speaker: Dr Hua-Xing Chen (Beihang University)

Slides Y2175_-0424.pptx

15:20 → 16:05 Solution to the Y problem

Solution to the Y problem

Speaker: 俊璋 王 (Lanzhou University)

16:10 → 16:55 1-+奇特态

1-+奇特态

Speaker: 相坤 董 (UCAS)

Slides Dongxiangkun.pdf

Sunday, 26 April

09:00 → 09:45 Jetomography of QGP in heavy-ion collisions

Jetomography of QGP in heavy-ion collisions

Speaker: Prof. Xin-Nian Wang (Central China Normal University/Lawrence Berkeley National Laboratory)

Slides Xin-nian_Wang.pdf

09:50 → 10:35 BESIII上的超子极化研究

BESIII上的超子极化研究

Speaker: Dr Rong-Gang Ping (高能所)

Slides pingrg.pdf

10:40 → 11:25 DDK 3-body system in Lattice QCD

The lattice QCD simulation has been generating 3-body hadron spectrum already. The finite volume analysis is necessary to translate these lattice spectra in a finite volume to physical information in the infinite volume. Based on non-relativistic effective field theory, we show the preliminary result of lattice spectrum for DDK 3-body system. In the work, the 2-body information is input referring to arXiv:1906.11995. And 3-body bound state predicted by arXiv:1906.11995 is reproduced in effective field theory. The lattice spectra both below and above threshold are given. They can be compared with future lattice 3-body simulation.

Speaker: Dr Jin-Yi Pang (University of Shanghai Science and Techology)

Slides hadron2020.pdf

14:30 → 15:15 Lattice calculation of hadron structure: parton distribution functions

In this talk, I will introduce the new method of using Lattice QCD to simulate the Parton distribution functions.

Speaker: Prof. Wei Wang (Shanghai JiaoTong University)

15:20 → 16:05 Identifying the $\Sigma_b(6097)$, $\Xi_b(6227)$ and $\Omega_b$ as P-wave bottom baryons

In this talk, I would like to report our recent studies on spectra and decay properties of the excited bottom baryons, $\Sigma_b(6097)$, $\Xi_b(6227)$ and four narrow $\Omega_b$ states, which were newly discovered by LHCb collaboration. At first, we calculated the spectra of P-wave bottom baryons by using the QCD sum rule. The estimations are well consistent with the experimental results. Then We also utilized the method of light−cone sum rules, which is widely used to study the hadron decays in recent years. Our estimations suggest that the bottom baryons $\Sigma_{b}(6097)^{\pm}$ and $\Xi_{b}(6227)^-$ both belong to the P−wave bottom baryon doublet $[\mathbf{6}{F},2,1,\lambda]$, whose color is symmetric $\mathbf{6}_{F}$, the total angular momentum of light system is 2, the spin of light system is 1, and it is $\lambda$−type excitation. And the four narrow $\Omega_b$ states can also be explained as the P-wave bottom baryons but belong to different excitation types. We also made some other predictions.

Speaker: Dr Er-Liang Cui (Northwest A&F University)

Slides hadronustc2020_cel_nwafu.pdf

16:10 → 16:55 Triangle singularity appearing as an X(3872)-like peak in $B\to(J/\psi \pi+ \pi-)K\pi$

Triangle singularity appearing as an X(3872)-like peak in $B\to(J/\psi \pi+ \pi-)K\pi$

Speaker: Dr Satoshi Nakamura (Universidade Cruzeiro do Sul)

Slides s.nakamura.pdf

17:00 → 17:10 闭幕式

Speaker: Hai-Ping Peng (USTC)