典型文献
Weak radiative hyperon decays in covariant baryon chiral perturbation theory
文献摘要：
Weak radiative hyperon decays,important to test the strong interaction and relevant in searches for beyond the standard model physics,have remained puzzling both experimentally and theoretically for a long time.The recently updated branching fraction and first measurement of the asymmetry parameter of Λ→nγ by the BESⅢ Collaboration further exacerbate the issue,as none of the existing predictions can describe the data.We show in this work that the covariant baryon chiral perturbation theory,with con-straints from the latest measurements of hyperon non-leptonic decays,can well describe the BESⅢ data.The predicted branching fraction and asymmetry parameter for Ξ-→ Σ-γ are also in agreement with the experimental data.We note that a more precise measurement of the asymmetry parameter,which is strongly constrained by chiral symmetry and related with that of Σ+→ pγ,is crucial to test Hara's theo-rem.We further predict the branching fraction and asymmetry parameter of Σo → nγ,whose future mea-surement can serve as a highly nontrivial check on our understanding of weak radiative hyperon decays and on the covariant baryon chiral perturbation theory.
文献关键词：
中图分类号：
[2]
数理科学和化学（O）
/
物理学（O4）
/
原子核物理学、高能物理学（O57）
/
高能物理学（O572）
/
粒子物理学（O572.2）
/
实验与测定（O572.21）
/
测量和数据处理设备（O572.21+3）
[3]
文学（I）
作者姓名：
Rui-Xiang Shi;Shuang-Yi Li;Jun-Xu Lu;Li-Sheng Geng
作者机构：
School of Space and Environment,Beihang University,Beijing 102206,China;School of Physics,Beihang University,Beijing 102206,China;Peng Huanwu Collaborative Center for Research and Education,Beihang University,Beijing 100191,China;Beijing Key Laboratory of Advanced Nuclear Materials and Physics,Beihang University,Beijing 100191,China;School of Physics and Microelectronics,Zhengzhou University,Zhengzhou 450001,China
文献出处：
引用格式：
[1]Rui-Xiang Shi;Shuang-Yi Li;Jun-Xu Lu;Li-Sheng Geng-.Weak radiative hyperon decays in covariant baryon chiral perturbation theory)[J].科学通报（英文版）,2022(22):2298-2304
A类：
hyperon,leptonic
B类：
Weak,radiative,decays,covariant,baryon,chiral,perturbation,theory,important,interaction,relevant,searches,beyond,standard,model,physics,have,remained,puzzling,both,experimentally,theoretically,long,recently,updated,branching,fraction,first,asymmetry,parameter,by,BES,Collaboration,further,exacerbate,issue,none,existing,predictions,can,describe,data,show,this,work,that,straints,from,latest,measurements,well,predicted,are,also,agreement,note,more,precise,which,strongly,constrained,related,crucial,Hara,whose,future,serve,highly,nontrivial,check,our,understanding,weak
AB值：
0.4479
相似文献
机标中图分类号，由域田数据科技根据网络公开资料自动分析生成，仅供学习研究参考。
