%0 Journal Article
%A López Maroto, Antonio
%T Gravitino production during preheating
%D 2000
%@ 0920-5632
%U https://hdl.handle.net/20.500.14352/59331
%X We study the production of gravitinos during the preheating era after inflation by means of the non-perturbative Bogolyubov technique. Considering only the helicity ±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.
%~