Quintessential inflation at low reheating temperatures

TL;DR

This paper tests simple quintessential inflation models against recent observational data, focusing on low reheating temperatures from gravitational particle production to ensure nucleosynthesis success and avoid issues like gravitino overproduction.

Contribution

It demonstrates the viability of quintessential inflation models with low reheating temperatures consistent with observational constraints and supergravity considerations.

Findings

Models match BICEP and Planck data

Reheating temperatures support nucleosynthesis

Low temperatures prevent gravitino overproduction

Abstract

We have tested some simple quintessential inflation models, imposing that they match with the recent observational data provided by the BICEP and Planck's team and leading to a reheating temperature, which is obtained via gravitational particle production after inflation, supporting the nucleosynthesis success. Moreover, for the models coming from supergravity one needs to demand low temperatures in order to avoid problems such as the gravitino overproduction or the gravitational production of moduli fields, which are obtained only when the reheating temperature is due to the production of massless particles with a coupling constant very close to its conformal value.