Gravitino production during preheating

Details Gravitino production during preheating Gravitino production during preheating

1999-06-16

arxiv.org/abs/hep-ph/9906388v1

Nucl.Phys.Proc.Suppl.81:351-355,2000

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages, LaTeX, 2 figures. Talk given in the International Workshop on Particles in Astrophysics and Cosmology, Valencia (Spa

Scientific paper

10.1016/S0920-5632(99)00896-8

We study the production of gravitinos during the preheating era after inflation by means of the non-perturbative Bogolyubov technique. Considering only the helicity $\pm 3/2$ 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.

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