The nonperturbative decay of SUSY flat directions

Details The nonperturbative decay of SUSY flat directions The nonperturbative decay of SUSY flat directions

2008-05-02

arxiv.org/abs/0805.0273v1

Phys.Rev.D78:063512,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

29 pages, 7 .ps figures

Scientific paper

10.1103/PhysRevD.78.063512

We compute the nonperturbative decay of supersymmetric flat directions due to their D-term potential. Flat directions can develop large vacuum expectation values (vevs) during inflation, and, if they are long-lived, this can strongly affect the reheating and thermalization stages after the inflation. We study a generic system of two U(1) or SU(2) flat directions which are cosmologically evolving after inflation. After proper gauge fixing, we show that the excitations of the fields around this background can undergo exponential amplification, at the expense of the energy density of the flat directions. We compute this effect for several values of the masses and the initial vevs of the two flat directions, through a combination of analytical methods and extensive numerical simulations. For a wide range of parameters the flat directions decay within their first few rotations.

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