Hyperon weak radiative decay

• 来源期刊: 中国物理C（英文版）
• 年，卷（期）: 2021,（1）
• 所属期刊栏目: PARTICLES AND FIELDS
• 页码范围: 1-15
• 页数: 15页
• 语种: 英文
• DOI: 10.1088/1674-1137/abc067

摘要

We revisit the hyperon weak radiative decays in the framework of the non-relativistic constituent quark model.This study confirms the nonlocal feature of the hyperon weak radiative transition operators,which are domin-ated by the pole terms,and an overall self-consistent description of the available experimental data for the Cabibbo-favored hyperon weak radiative decays is presented.It provides a natural mechanism for evading the Hara theorem,where sizeable parity-violating contributions can come from the intermediate orbital excitations.Cancellations between pole terms also explain the significant SU(3)flavor symmetry breaking manifested by the experimental data.We also discuss several interesting selection rules arising from either the electromagnetic or the weak interac-tion vertices.These features suggest nontrivial relations among various hyperon decays.