Relic Abundance of Asymmetric Dark Matter
High Energy Physics - Phenomenology
2015-05-28 v2 Cosmology and Nongalactic Astrophysics
Abstract
We investigate the relic abundance of asymmetric Dark Matter particles that were in thermal equilibrium in the early universe. The standard analytic calculation of the symmetric Dark Matter is generalized to the asymmetric case. We calculate the asymmetry required to explain the observed Dark Matter relic abundance as a function of the annihilation cross section. We show that introducing an asymmetry always reduces the indirect detection signal from WIMP annihilation, although it has a larger annihilation cross section than symmetric Dark Matter. This opens new possibilities for the construction of realistic models of MeV Dark Matter.
Keywords
Cite
@article{arxiv.1104.5548,
title = {Relic Abundance of Asymmetric Dark Matter},
author = {Hoernisa Iminniyaz and Manuel Drees and Xuelei Chen},
journal= {arXiv preprint arXiv:1104.5548},
year = {2015}
}
Comments
20 pages, 11 figures, Accepted by JCAP