Constraints through decaying inflaton: maximum reheating temperature

2017/09/01 by Debaprasad Maity, Maity, Debaprasad
Physics and Astronomy · #Advanced Thermodynamics and Statistical Mechanics #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #High Energy Physics - Theory (hep-th)

paper · pdf · doi:10.48550/arxiv.1709.00251

openalex publication_date 2017/09/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

In this paper we study the reheating constraints on inflationary models considering perturbatively decaying inflaton. Important difference with the existing analysis is the inclusion of explicit decaying dynamics of inflaton during reheating. One of the important findings of our analysis is the possible existence of maximum reheating temperature T_re^max considering perturbative reheating scenario. For all the models under consideration the value of this temperature turned out to be T_re^max ∼ 10¹⁵ GeV. Corresponding to this value of reheating temperature the duration of reheating period assumes naturally small value, N_re ≃ 0.3 which indicates instantaneous reheating. Most importantly, maximum reheating temperature T^max_re also leads to a maximum values of scalar spectral index n^max_s and inflationary e-folding number N^max_cmb in association with the observed CMB scale. Based on our general analysis, we have studied four different inflationary models, and discuss their predictions and constraints.

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