Reheating constraints on modified quadratic chaotic inflation

TL;DR

This paper investigates how reheating parameters constrain a modified quadratic chaotic inflation model, showing that small corrections can align it with current observations and tighten model constraints.

Contribution

It introduces a logarithmic correction to the quadratic inflation potential and analyzes reheating constraints using recent cosmological data.

Findings

Small corrections make the model consistent with observations.

Reheating analysis tightens model parameter constraints.

Study improves the model's observational compatibility.

Abstract

The Reheating era of inflationary universe can be parameterized by various parameters like reheating temperature \(T_{\text{re}}\), reheating duration \(N_{\text{re}}\) and average equation of state parameter \(\overline{\omega }_{\text{re}}\), which can be constrained by observationally feasible values of scalar power spectral amplitude \(A_{\text{s}}\) and spectral index \(n_{\text{s}}\). In this work, by considering the quadratic chaotic inflationary potential with logarithmic-correction in mass, we examine the reheating era in order to place some limits on model's parameter space. By investigating the reheating epoch using Planck 2018+BK18+BAO data, we show that even a small correction can make the quadratic chaotic model consistent with latest cosmological observations. We also find that the study of reheating era helps to put much tighter constraints on model and effectively improves accuracy of model.