Scalar dark matter and muon g-2 in a U(1)_(L_(μ)-L_(τ)) model

作     者：XinXin Qi AiGeng Yang Wei Liu Hao Sun 祁鑫鑫;杨爱更;刘威;孙昊

作者机构：Institute of Theoretical PhysicsSchool of PhysicsDalian University of TechnologyLiaoning 116024China Department of Applied PhysicsNanjing University of Science and TechnologyNanjing 210094China 

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

年 卷 期：2022年第46卷第8期

页      面：23-33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 the National Natural Science Foundation of China (12075043 12147205) 

主　　题：scalar dark matter model Z_(2)symmetry co-annihilation 

摘      要：We consider a simple scalar dark matter model within the frame of gauged L_(μ)→T_(τ) symmetry.A new gauge boson Z ,as well as two scalar fields S and Φ,are introduced to the Standard Model(SM),where S and Φ are SM singlets but both carry U(1)_(L_(μ)-L_(τ)) *** real component and imaginary component of S can acquire different masses after spontaneously breaking symmetry,and the lighter one can play the role of dark matter,which is stabilized by an extra Z_(2) *** consider the possibility of light dark matter as well as the co-annihilation case in our model and present the current(g-2)_(μ) anomaly,Higgs invisible decay,dark matter relic density,and direct detection constraints on the parameter *** detection gives the most stringent restriction on the model,and we found that although most of the parameter space is excluded,a mass region of a few GeV is still allowed where the co-annihilation process is also permitted in the model.