CMB constraints on dark matter phenomenology via reheating in minimal plateau inflation

TL;DR

This paper investigates how cosmic microwave background data constrains dark matter properties and reheating processes in a class of inflationary models characterized by plateau potentials, linking early universe dynamics with current observations.

Contribution

It generalizes the connection between reheating, dark matter, and CMB data for inflation models with a broad range of inflaton equations of state.

Findings

Reheating parameters are constrained by CMB data within plateau inflation models.

Dark matter parameter space is limited by the combined analysis of reheating and CMB observations.

The study extends previous work to more general inflaton equations of state.

Abstract

We consider the CMB constraints on reheating and dark matter parameter space for a specific plateau type inflationary model. The plateau inflationary models which are currently most favored models from data can be well approximated by a potential of the form $V(\phi)\propto \phi^n$ around $\phi=0$. This fact makes it possible to study the reheating phase with general inflaton equation of state in a viable cosmological scenario. In addition, following our recent work[1], we generalize the connection between reheating and the present CMB data and the dark matter parameter space for general inflaton equation of state parameter.