Relic Abundance of Asymmetric Dark Matter and the Scalar--Tensor Model

TL;DR

This paper investigates how the relic abundance of asymmetric Dark Matter is affected within the scalar--tensor model, extending calculations to nonstandard cosmologies and deriving constraints on model parameters.

Contribution

It extends relic density calculations to nonstandard cosmologies within the scalar--tensor model, analyzing the impact on Dark Matter abundance and constraining model parameters.

Findings

Relic density is significantly affected by the scalar--tensor model.

Constraints on model parameters are derived from observed Dark Matter abundance.

Nonstandard cosmology alters the Hubble expansion rate and relic density calculations.

Abstract

The relic abundance of asymmetric Dark Matter particles in the scalar--tensor model is analysized in this article. We extend the numeric and analytic calculation of the relic density of the asymmetric Dark Matter in the standard cosmological scenario to the nonstandard cosmological scenario. We focus on the scalar--tensor model. Hubble expansion rate is changed in the nonstandard cosmological scenario. This leaves its imprint on the relic density of Dark Matter particles. In this article we investigate to what extent the asymmetric Dark Matter particle's relic density is changed in the scalar--tensor model. We use the observed present day Dark Matter abundance to find the constraints on the parameter space in this model.