Asymmetric Dark Matter and Sommerfeld Enhancement

TL;DR

This paper investigates how Sommerfeld enhancement influences the relic density of asymmetric dark matter with long-range interactions, deriving constraints and upper bounds based on Planck data.

Contribution

It introduces the impact of Sommerfeld enhancement on asymmetric dark matter relic density and provides new bounds on dark matter mass and parameters.

Findings

Sommerfeld effect increases dark matter annihilation cross section.

Relic density decreases due to enhancement, affecting dark matter abundance.

Derived upper bounds on asymmetric dark matter mass for s-wave and p-wave cases.

Abstract

We show that the relic density of asymmetric dark matter with long-range interactions is affected by the Sommerfeld enhancement. The annihilation cross section of asymmetric dark matter is enhanced due to the Sommerfeld effect. It results the relic density is decreased. Using the Planck date, the constraints on the asymmetry factor and coupling required to attain the observed dark matter density are obtained. We derive the upper bounds on the mass for asymmetric dark matter in s-wave and p-wave annihilation cases.