Superallowed decays within and beyond the standard model
Superallowed decays within and beyond the standard model
复制标题
DOI：
10.1140/epja/s10050-023-01030-7
复制
发表时间：
2023-05
期刊：
影响因子：
--
通讯作者：
A. Falkowski;M. González-Alonso;O. Naviliat-Cuncic;N. Severijns
中科院分区：
文献类型：
--
作者：
A. Falkowski;M. González-Alonso;O. Naviliat-Cuncic;N. Severijns
本文回顾了超允许跃迁在确定最轻夸克之间弱相互作用强度和寻找超越标准电弱模型的新物理中的作用。这里考虑的两组超允许衰变是纯费米跃迁和镜像跃迁。第一种已经被仔细研究了50多年。本文介绍了最相关的结果，并对核依赖性辐射校正和核非依赖性内辐射校正的作用进行了综述。在这种背景下，镜像转换的系统研究大约在15年前开始。尽管从那时起取得了重大进展，但数据仍然受到实验不确定性的限制。结合所有超允许跃迁的结果，给出了Cabibbo-Kobayashi-Maskawa矩阵第一行的一致性检验，该矩阵与标准模型表现出2张力。
This note reviews the role of superallowed transitions in determining the strength of the weak interaction among the lightest quarks and in searching for new physics beyond the standard electroweak model. The two sets of superallowed decays in nuclei considered here are pure Fermi and mirror transitions. The first have been scrutinized for more than 50 years. The most relevant results are presented and the role of the nucleus-dependent radiative correction and nucleus-independent inner radiative correction are reviewed. In this context, the systematic study of mirror transitions started about 15 years ago. Despite the significant progress made since then, the data is still limited by experimental uncertainties. Combining the results from all superallowed transitions, which are fully consistent, provides a test of unitarity of the first row of the Cabibbo-Kobayashi-Maskawa matrix, which displays a 2tension with the standard model.