New signature of low mass Z'in J/ψdecays  

作　　者：Chao-Qiang Geng Chia-Wei Liu Jiabao Zhang 耿朝强;劉佳韋;张嘉宝

机构地区：[1]School of Fundamental Physics and Mathematical Sciences,Hangzhou Institute for Advanced Study,UCAS,Hangzhou 310024,China [2]Tsung-Dao Lee Institute&School of Physics and Astronomy,Shanghai Jiao Tong University,Shanghai 200240,China [3]Institute of Theoretical Physics,University of Chinese Academy of Sciences,Beijing 100190,China

出　　处：《Chinese Physics C》2024年第8期1-5,共5页中国物理C（英文版）

基　　金：Supported in part by the National Key Research and Development Program of China under(2020YFC2201501);the National Natural Science Foundation of China(NSFC)(12347103,12205063)。

摘　　要：We explored a new approach to search for a low-mass Z′particle through J/ψdecays by identifying its existence through parity-violating phenomena in the isospin-violating final states ofΛΣ¯^(0)and the corresponding charge conjugated states ofΛΣ¯^(0).Our investigation centered on a generation-independent and leptophobic Z′with mass below 10 GeV.Given the present experimental conditions at Beijing Spectrometer III(BESIII)and the anticipated opportunities at the Super Tau Charm Factory(STCF),we conducted Monte-Carlo simulations to predict possible events at both facilities.Notably,we foresee a substantial enhancement in the precision of the lower limit estimation ofαNP as well as a reduction in statistical uncertainty with upcoming STCF experiments.Furthermore,it is essential to highlight that a null result in the measurement ofαNP would impose stringent constraints,requiring the Z′−q−q couplings to be in the order of 10^(−2).

关 键 词：Z′ PARITY VIOLATION J/Ψ 

分 类 号：O572.2[理学—粒子物理与原子核物理]