Thermal and non-thermal DM production in non-Standard Cosmologies: a mini review

TL;DR

This paper reviews how non-Standard Cosmologies, including exotic energy components, affect thermal and non-thermal Dark Matter production, especially within the Higgs portal model, impacting relic density and experimental constraints.

Contribution

It provides a concise overview of the influence of exotic cosmological components on Dark Matter production mechanisms and parameter space constraints.

Findings

Exotic energy components can alter the relic density calculations.

Non-thermal production mechanisms are viable in matter-like exotic cosmologies.

Constraints on Higgs portal models are affected by non-Standard cosmological scenarios.

Abstract

We provide a short review of some aspects of Dark Matter production in non Standard Cosmology. Considering the simplest Higgs portal model as definite particle physics setup, we consider the impact on the parameter space corresponding to the correct relic density, and the complementary experimental constraints, of the presence, during thermal production, of an exotic component dominating the energy density of the Universe. In the second part of the work we will focus on the case that such exotic component satisfies the equation of state of matter and it can produce DM non-thermally.