Gravitational production of gravitinos
Martin Lemoine (DARC, CNRS, Observatoire de Paris-Meudon, France)
TL;DR
This paper calculates the gravitational production of helicity ±3/2 gravitinos during inflation and compares it to production during reheating, providing insights into early universe particle generation mechanisms.
Contribution
It introduces a method to compute gravitino production from gravitational effects in inflationary scenarios, a novel comparison to particle interaction production during reheating.
Findings
Gravitational production of gravitinos is significant during inflation.
Comparison shows different dominant production mechanisms at various epochs.
Results impact understanding of early universe supersymmetry and dark matter constraints.
Abstract
We calculate the number density of helicity gravitinos produced out of the vacuum by the non-static gravitational field in a generic inflation scenario. We compare it to the number density of gravitinos produced in particle interactions during reheating.
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