重子物理与CP破坏研讨会-Workshop on Baryon Physics and CP Violation

Session

Session6

14 Dec 2025, 13:40

Conveners

Session6

• Fanrong Xu

22. Hyperon EDM at the J/ψ threshold

Yong Du (IMP CAS)

14/12/2025, 13:40

CP violation (CPV) is one of the key ingredients for our understanding of the baryon asymmetry. Despite its observation in kaons, B and D mesons, as well as recently the neutral Lambda b baryon, CPV has not yet been observed in hyperons. Using the 10 billion J/ψ events accumulated so far at BESIII and the hyperonic decay, we discuss the prospect of CPV exploration at the BESIII and beyond such...

7. On the equivalence of Flavor SU(3) analyses of B to PP decays

Yuji Shi (华东理工大学)

14/12/2025, 14:00

We conduct an SU(3) analysis of $B\to PP$ decays based on reduced matrix elements (RMEs), with $P$ being a light pseudoscalar meson excluding $\eta^{(\prime)}$. We show that a complete basis for the $B\to PP$ decays consists of ten RMEs, where the three RMEs arise from the electroweak penguin operators $O_{7,8}$. In the Standard Model, the relevant Wilson coefficients are small and thus can...

27. hyperon weak radiative decays in Light front approach

zhi-peng Xing (Nanjing Normal University)

14/12/2025, 14:20

Motivated by recent experimental data on $\Sigma^+\to p\gamma$ at BESIII, we investigate a class of hyperon weak radiative decays.
To estimate these processes, in our research, we employ a new type of light-front quark model with a three-quark picture for octet baryons.
In the three-quark picture, with the use of $SU(3)_f$ and spin symmetries, we present a general form of the light front...

26. 基于有效场论方法的超子弱衰变研究

Mr 瑞祥 史 (广西师范大学)

14/12/2025, 14:40

超子是含有奇异夸克的重子，其弱衰变主要分为三类：非轻衰变、辐射衰变以及半轻衰变。这些衰变过程是精确检验粒子物理标准模型以及寻找超出标准模型新物理的理想场所。超子弱衰变中，长久以来相关物理量的实验值与理论预言存在较大差异，一直是粒子物理研究的焦点问题之一，被称为超子弱衰变疑难。由于以前的实验数据有限且精度不够，致使当时的理论研究无法考虑部分可能起重要作用的贡献。近些年，BESIII实验多次测量了各种超子的弱衰变过程，积累了丰富的实验数据，并且发现部分测量值远离以前的实验值，这为理论上重新研究超子弱衰变疑难提供了机会。本报告主要介绍基于协变重子手征微扰理论和低能有效哈密顿量方法研究超子弱辐射衰变、半轻衰变以及非轻衰变的最新进展。