Preheating in supersymmetric models of inflation and the role of flat directions

by Ms Anna Kaminska (U. of Warsaw)

Wednesday 19 Nov 2008, 11:00 → 12:00 Europe/Zurich

1/1-025 (CERN)

The mechanism of preheating will be introduced and analyzed in the context of supersymmetry. Flat directions, a typical feature of supersymmetric models, can acquire large vacuum expectation values (VEVs) during inflation. A recent discussion about the impact of such large VEVs on the process of non-perturbative particle production will be presented. Then this problem will be analyzed in a proposed specific consistent model of inflation and preheating in Supergravity. New effects connected with the Supergravity framework and non-renormalizable terms in the superpotential will be shown, modifying the existing picture of preheating in the presence of large flat direction VEVs.

Reference:

• R. Allahverdi, A. Mazumdar, "Reheating in supersymmetric high scale inflation", Phys.Rev.D76:103526, 2007, hep-ph/0603244
• K.A. Olive, M. Peloso, "The Fate of SUSY Flat Directions and their Role in Reheating", Phys.Rev.D74:103514, 2006, hep-ph/0608096
• A. Basboll, "SUSY Flat Direction Decay - the prospect of particle production and preheating", arXiv:0801.0745