Journal
PHYSICS LETTERS B
Volume 648, Issue 2-3, Pages 224-235Publisher
ELSEVIER
DOI: 10.1016/j.physletb.2007.02.072
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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-6 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. (C) 2007 Elsevier B.V. All rights reserved.
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