Gravitino production during preheating
High Energy Physics - Phenomenology
2008-11-26 v1 Astrophysics
High Energy Physics - Theory
Abstract
We study the production of gravitinos during the preheating era after inflation by means of the non-perturbative Bogolyubov technique. Considering only the helicity states, the problem is reduced to the simpler Dirac fermions case. We calculate the production in a particular supergravity model in an expanding universe and obtain the spectrum and number density. Finally we compare the results with the nucleosynthesis bounds and extract some consequences.
Keywords
Cite
@article{arxiv.hep-ph/9906388,
title = {Gravitino production during preheating},
author = {Antonio L. Maroto},
journal= {arXiv preprint arXiv:hep-ph/9906388},
year = {2008}
}
Comments
10 pages, LaTeX, 2 figures. Talk given in the International Workshop on Particles in Astrophysics and Cosmology, Valencia (Spain), May 3-8, 1999