Asymmetric dark matter abundance including non-thermal production  

作　　者：Ma Qingshan Hoernisa Iminniyaz 

机构地区：[1]School of Physics Science and Technology,Xinjiang University,Urumqi 830017,China

出　　处：《Communications in Theoretical Physics》2023年第8期128-133,共6页理论物理通讯（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.2020640017,2022D01C52 and 11765021)。

摘　　要：We investigate the relic abundance of asymmetric dark matter where the asymmetric dark matter is non–thermally produced from the decay of heavier particles in addition to the usual thermal production.We discuss the relic density of asymmetric dark matter including the decay of heavy particles in low-temperature scenarios.Here,we still assume that the Universe is radiationdominated and there is asymmetry before the decay of heavy particles.We obtain an increased abundance of asymmetric dark matter when there is an additional contribution from the decay of heavier particles.Finally,we find the constraints on the asymmetry factor and annihilation crosssection using Planck data.

关 键 词：asymmetric dark matter relic density non-thermal production 

分 类 号：O572.2[理学—粒子物理与原子核物理]