Constraints on the Reheating Temperature in Gravitino Dark Matter Scenarios
Abstract
Considering gravitino dark matter scenarios, we study constraints on the reheating temperature of inflation. We present the gauge-invariant result for the thermally produced gravitino yield to leading order in the Standard Model gauge couplings. Within the framework of the constrained minimal supersymmetric Standard Model (CMSSM), we find a maximum reheating temperature of about 10^7 GeV taking into account bound-state effects on the primordial Li abundance. We show that late-time entropy production can relax this constraint significantly. Only with a substantial entropy release after the decoupling of the lightest Standard Model superpartner, thermal leptogenesis remains a viable explanation of the cosmic baryon asymmetry within the CMSSM.
Keywords
Cite
@article{arxiv.hep-ph/0612291,
title = {Constraints on the Reheating Temperature in Gravitino Dark Matter Scenarios},
author = {Josef Pradler and Frank Daniel Steffen},
journal= {arXiv preprint arXiv:hep-ph/0612291},
year = {2008}
}
Comments
13 pages, 15 figures, revised version accepted for publication (reheating phase considered, improved treatment of entropy production, revised last section, references added)