RareΛb→Λl+l−decay in the Bethe-Salpeter equation approach

作     者：Liang-Liang Liu Xian-Wei Kang Zhen-Yang Wang Xin-Heng Guo 刘亮亮;康现伟;王振洋;郭新恒

作者机构：College of Physics and Information EngineeringShanxi Normal UniversityLinfen 041004China Physics DepartmentNingbo UniversityZhejiang 315211China College of Nuclear Science and TechnologyBeijing Normal UniversityBeijing 100875China 

出 版 物：《Chinese Physics C》 (中国物理C（英文版）)

年 卷 期：2020年第44卷第8期

页      面：78-87页

核心收录：

学科分类：07[理学] 070202[理学-粒子物理与原子核物理] 0702[理学-物理学] 

基　　金：Supported by National Natural Science Foundation of China(11775024 11575023 11905117 11847052 11805012 11947001) 

主　　题：charmonium decay width lattice QCD 

摘      要：We study the rare decaysΛb→Λl+l−(l=e,μ,τ)in the Bethe-Salpeter equation *** find that the branching ratio is Br(Λb→Λμ^+μ^−)×10^6=1.051∼1.098 in our *** result agrees with the experimental data *** the same parametric region,we find that the branching ratio is Br(Λb→Λe^+e^−(τ^+τ^−))×10^6=0.252∼0.392(0.286∼0.489).