Relic Abundance of Asymmetric Dark Matter

Details Relic Abundance of Asymmetric Dark Matter Relic Abundance of Asymmetric Dark Matter

2011-04-29

arxiv.org/abs/1104.5548v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

20 pages, 11 figures, Accepted by JCAP

Scientific paper

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.

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