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arXiv · hep-th/9907124

Gravitino Production After Inflation

Renata Kallosh·Lev Kofman·Andrei Linde·Antoine Van Proeyen
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Abstract

We investigate the production of gravitinos in a cosmological background. Gravitinos can be produced during preheating after inflation due to a combined effect of interactions with an oscillating inflaton field and absence of conformal invariance. In order to get insight on conformal properties of gravitino we reformulate phenomenological supergravity in SU(2,2|1)-symmetric way. The Planck mass and F- and D-terms appear via the gauge-fixed value of a superfield that we call conformon. We find that in general the probability of gravitino production is not suppressed by the small gravitational coupling. This may lead to a copious production of gravitinos after inflation. Efficiency of the new non-thermal mechanism of gravitino production is very sensitive to the choice of the underlying theory. This may put strong constraints on certain classes of inflationary models.

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Renata Kallosh, Lev Kofman, Andrei Linde, Antoine Van Proeyen. 2000-06-29. Gravitino Production After Inflation. https://doi.org/10.1103/physrevd.61.103503

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