A Three Higgs Doublet Model for Fermion Masses

作     者：晁伟 

作者机构：Department of Physics University of Massachusetts-Amherst 

出 版 物：《Communications in Theoretical Physics》 (理论物理通讯（英文版）)

年 卷 期：2016年第65卷第9期

页      面：340-348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 Wisconsin Alumni Research Foundation 

主　　题：Fermion masses three Higgs dark matter 

摘      要：In this paper we propose a possible explanation to the Fermion mass hierarchy problem by fitting the type-II seesaw mechanism into the Higgs doublet sector, such that their vacuum expectation values are hierarchal. We extend the Standard Model with two extra Higgs doublets as well as a spontaneously broken U X(1) gauge symmetry. All the fermion Yukawa couplings except that of the top quark are of O(10^(-2)) in our model. Constraints on the parameter space of the model from low energy processes are studied. Besides, the lightest one of the neutral fermion fields, which is introduced to cancel the anomalies of the U(1)X gauge symmetry can be the cold dark matter candidate. We investigate its signature in the dark matter direct detection.