Direct couplings of mimetic dark matter and their cosmological effects  

作　　者：沈浏源 牟一岑 郑云龙 李明哲 

机构地区：[1]Department of Physics, Nanjing University [2]Joint Center for Particle,Nuclear Physics and Cosmology [3]Interdisciplinary Center for Theoretical Study, University of Science and Technology of China

出　　处：《Chinese Physics C》2018年第1期145-150,共6页中国物理C（英文版）

基　　金：Supported by NSFC(11422543,11653002)

摘　　要：The original mimetic model was proposed to take the role of dark matter. In this paper we consider possible direct interactions of mimetic dark matter with other matter in the universe, especially standard model particles such as baryons and photons. By imposing shift symmetry, the mimetic dark matter field can only have derivative couplings. We discuss the possibilities of generating baryon number asymmetry and cosmic birefringence in the universe based on the derivative couplings of mimetic dark matter to baryons and photons.The original mimetic model was proposed to take the role of dark matter. In this paper we consider possible direct interactions of mimetic dark matter with other matter in the universe, especially standard model particles such as baryons and photons. By imposing shift symmetry, the mimetic dark matter field can only have derivative couplings. We discuss the possibilities of generating baryon number asymmetry and cosmic birefringence in the universe based on the derivative couplings of mimetic dark matter to baryons and photons.

关 键 词：cosmology dark matter baryogenesis cosmological CPT violation 

分 类 号：P145.9[天文地球—天体物理] P159[天文地球—天文学]