Exploring the dark annihilation: multi-component asymmetric and symmetric dark matter

TL;DR

This paper develops a model-independent framework using Boltzmann equations to study multi-component dark matter with both symmetric and asymmetric parts, including hidden sector interactions and non-standard cosmological effects.

Contribution

It introduces a comprehensive approach to analyze multi-component dark matter with hidden sector interactions and non-standard expansion, extending previous models.

Findings

Formulated Boltzmann equations for multi-component dark matter

Analyzed the impact of hidden sector interactions on dark matter abundance

Considered effects of non-standard universe expansion on dark matter

Abstract

The article describes Boltzmann equations for a potential case of multi-particle dark matter with symmetric and asymmetric dark matter components in a model-independent approach. We focus on the specific scenario where one of the DM candidates remains completely invisible, having only hidden sector interactions with the other dark matter constituent referred to as ``dark annihilation". The possible effect of non-standard expansion of the universe on the dark matter abundance is also taken into account.