文献类型：期刊文献

英文题名：Light dark matter from dark sector decay

作者：Cheng, Yu[1,2]; Liao, Wei[1]

机构：[1] Institute of Modern Physics, School of Sciences, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, China; [2] Tsung-Dao Lee Institute, School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai, 200240, China

年份：2020

外文期刊名：arXiv

收录：EI(收录号：20210016415)

语种：英文

外文关键词：Dark Matter - Germanium alloys - Germanium compounds

摘要：We study the possibility that light dark matter can be produced with right relic density by the decay of other dark sector particles. We study this possibility in a model with right-handed neutrinos, a dark sector singlet scalar and a dark sector singlet fermion. The decay of the heavier dark sector singlet scalar gives rise to the lighter dark sector singlet fermion which serves as the dark matter candidate. We show that the right dark matter relic density can be produced by the decay of the dark sector singlet scalar. We find that the mass of the dark sector singlet fermion can be GeV scale or MeV scale and the interaction of the dark sector singlet fermion is very weak. The dark sector singlet scalar can have a mass of GeV-TeV scale and can have weak scale interactions with the Standard Model(SM) particles. So, in this scenario, dark matter has an interaction with the SM much weaker than the weak interaction, but the dark sector still has weak scale interaction with the SM. Copyright ? 2020, The Authors. All rights reserved.