Gravitino thermal production

TL;DR

This paper presents a refined calculation of gravitino thermal production rate using full one-loop thermal self-energy, including non-self-energy processes, resulting in a 10% difference from previous estimates and providing a practical parametrization for abundance calculations.

Contribution

It introduces a comprehensive one-loop corrected calculation of gravitino production, surpassing previous approximations and including additional relevant processes.

Findings

Production rate differs by nearly 10% from previous estimates.

Provides a parametrization for gravitino abundance as a function of reheating temperature.

Includes all relevant 2→2 processes beyond self-energy contributions.

Abstract

In this talk we present a new calculation of the gravitino production rate, using its full one-loop corrected thermal self-energy, beyond the hard thermal loop approximation. Gravitino production $2 \to 2$ processes, that are not related to its self-energy have been taken properly into account. Our result, compared to the latest estimation, differs by almost 10%. In addition, we present a handy parametrization of our finding, that can be used to calculate the gravitino thermal abundance, as a function of the reheating temperature.