The ■_(s)^(0)→J/ψπ^(0)η decay and the a_(0)(980)-f_(0)(980) mixing  

作　　者：Jia-Ting Li Jia-Xin Lin Gong-Jie Zhang Wei-Hong Liang E.Oset 李嘉婷;林佳欣;张功杰;梁伟红;E.Oset(Department of Physics,Guangxi Normal University,Guilin 541004,China;Guangxi Key Laboratory of Nuclear Physics and Technology,Guangxi Normal University,Guilin 541004,China;Departamento de Física Teórica and IFIC,Centro Mixto Universidad de Valencia-CSIC Institutos de Investigación de Paterna,Aptdo.22085,46071 Valencia,Spain)

机构地区：[1]Department of Physics,Guangxi Normal University,Guilin 541004,China [2]Guangxi Key Laboratory of Nuclear Physics and Technology,Guangxi Normal University,Guilin 541004,China [3]Departamento de Física Teórica and IFIC,Centro Mixto Universidad de Valencia-CSIC Institutos de Investigación de Paterna,Aptdo.22085,46071 Valencia,Spain

出　　处：《Chinese Physics C》2022年第8期122-127,共6页中国物理C（英文版）

基　　金：partly supported by the National Natural Science Foundation of China (11975083,12147211);partly supported by the Spanish Ministerio de Economia y Competitividad and European FEDER funds (FIS2017-84038-C2-1-P B);Generalitat Valenciana (PROMETEO/2020/023);funding from the European Unions Horizon 2020 research and innovation programme (824093) for the"STRONG-2020"project。

摘　　要：We study the ■_(s)^(0)→J/ψf_(0)(980) and ■_(s)^(0)→J/ψa_(0)(980) reactions,and pay attention to the different sources of iso spin violation and mixing of f_(0)(980) and a_(0)(980) resonances where these resonances are dynamically generated from meson-meson interactions.We find that the main cause of isospin violation is isospin breaking in the meson-meson transition T matrices,and the other source is that the loops involving kaons in the production mechanism do not cancel due to the different masses of charged and neutral kaons.We obtain a branching ratio for a_(0)(980)production of the order of 5×10^(-6).Future experiments can address this problem,and the production rate and shape of the π^(0)η mass distribution will definitely help to better understand the nature of scalar resonances.

关 键 词：strange B meson decay isospin violation a_(0)(980)–f_(0)(980)mixing hadronic structure 

分 类 号：O572.33[理学—粒子物理与原子核物理]