Solving the strong CP problem via aˉθ-characterized mirror symmetry

作     者：顾佩洪 Pei-Hong Gu

作者机构：School of PhysicsJiulonghu CampusSoutheast UniversityNanjing 211189China 

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

年 卷 期：2024年第48卷第3期

页      面：20-24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 in part by the National Natural Science Foundation of China (12175038)and in part by the Fundamental Research Funds for the Central Universities 

主　　题：strong CP problem θ¯-characterized mirror symmetry two Higgs doublets 

摘      要：In the standard model QCD Lagrangian,a term of CP violating gluon density is theoretically expected to have a physical coefficientθ¯,which is typically on the order of ***,the upper bound on the electric dipole moment of the neutron enforces the value ofθ¯to be extremely *** significant discrepancy between theoretical expectations and experimental results in this context is widely recognized as the strong CP *** solve this puzzle in an appealing context of two Higgs doublets,we propose aθ¯-characterized mirror symmetry between two Higgs singlets with respective discrete *** our scenario,the parameterθ¯can completely disappear from the full Lagrangian after the standard model fermions take a proper phase rotation as well as the Higgs doublets and ***,all of new physics for solving the strong CP problem can be allowed near the TeV scale.