Abundance of Asymmetric Dark Matter in Brane World Cosmology

TL;DR

This paper explores how brane world cosmology affects the relic abundance of asymmetric Dark Matter, suggesting potential for indirect detection under specific conditions related to cross section and Planck scale.

Contribution

It analyzes the impact of brane world cosmology on asymmetric Dark Matter relic abundance and identifies conditions for indirect detection feasibility.

Findings

Enhanced Hubble rate alters Dark Matter relic abundance.

Indirect detection is possible with small cross section.

Constraints depend on cross section and 5D Planck mass.

Abstract

Relic abundance of asymmetric Dark Matter particles in brane world cosmological scenario is investigated in this article. Hubble expansion rate is enhanced in brane world cosmology and it affects the relic abundance of asymmetric Dark Matter particles. We analyze how the relic abundance of asymmetric Dark Matter is changed in this model. We show that in such kind of nonstandard cosmological scenario, indirect detection of asymmetric Dark Matter is possible if the cross section is small enough which let the anti--particle abundance kept in the same amount with the particle. We show the indirect detection signal constraints can be used to such model only when the cross section and the 5 dimensional Planck mass scale are in appropriate values.