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Abstract: We compute the nonperturbative decay of supersymmetric flat directions due totheir D-term potential. Flat directions can develop large vacuum expectationvalues vevs during inflation, and, if they are long-lived, this can stronglyaffect the reheating and thermalization stages after the inflation. We study ageneric system of two U1 or SU2 flat directions which are cosmologicallyevolving after inflation. After proper gauge fixing, we show that theexcitations of the fields around this background can undergo exponentialamplification, at the expense of the energy density of the flat directions. Wecompute this effect for several values of the masses and the initial vevs ofthe two flat directions, through a combination of analytical methods andextensive numerical simulations. For a wide range of parameters the flatdirections decay within their first few rotations.



Autor: A.E. Gumrukcuoglu, Keith A. Olive, Marco Peloso, Matthew Sexton

Fuente: https://arxiv.org/







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