Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2006-08-09
Phys.Rev.D74:103514,2006
Physics
High Energy Physics
High Energy Physics - Phenomenology
30 pages, 6 .ps figures. Final published version
Scientific paper
10.1103/PhysRevD.74.103514
We consider the role of supersymmetric flat directions in reheating the Universe after inflation. One or more flat directions can develop large vevs during inflation, which can potentially affect reheating by slowing down scattering processes among inflaton decay products or by coming to dominate the energy density of the Universe. Both effects occur only if flat directions are sufficiently long-lived. The computation of their perturbative decay rate, and a simple estimate of their nonperturbative decay have led to the conclusion that this is indeed the case. In contrast, we show that flat directions can decay quickly through nonperturbative channels in realistic models. The mass matrix for MSSM excitations around flat directions has nondiagonal entries, which vary with the phase of the (complex) flat directions. The quasi-periodic motion of the flat directions results in a strong parametric resonance, leading to the rapid depletion of the flat direction within its first few rotations. This may preclude any significant role for the flat directions in reheating the Universe after inflation in models in which the inflaton decays perturbatively.
Olive Keith A.
Peloso Marco
No associations
LandOfFree
The Fate of SUSY Flat Directions and their Role in Reheating does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The Fate of SUSY Flat Directions and their Role in Reheating, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Fate of SUSY Flat Directions and their Role in Reheating will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-247765