Non-perturbative decay of udd and QLd flat directions

Details Non-perturbative decay of udd and QLd flat directions Non-perturbative decay of udd and QLd flat directions

2009-10-06

arxiv.org/abs/0910.0854v1

Phys.Rev.D80:123520,2009

Physics

High Energy Physics

High Energy Physics - Phenomenology

32 pages, 1 figure

Scientific paper

10.1103/PhysRevD.80.123520

The Minimal Supersymmetric Standard Model has several flat directions, which can naturally be excited during inflation. If they have a slow (perturbative) decay, they may affect the thermalization of the inflaton decay products. In the present paper, we consider the system of udd and QLd flat directions, which breaks the U(1)xSU(2)xSU(3) symmetry completely. In the unitary gauge and assuming a general soft breaking mass configuration, we show that for a range of parameters, the background condensate of flat directions can undergo a fast non-perturbative decay, due to non-adiabatic evolution of the eigenstates. We find that both the background evolution and part of the decay can be described accurately by previously studied gauged toy models of flat direction decay.

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