Heidelberg 2007 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 408: Kosmologie II
T 408.3: Vortrag
Donnerstag, 8. März 2007, 17:21–17:39, KIP SR 2.403
Constraints on the Reheating Temperature in Gravitino Dark Matter Scenarios — •Josef Pradler and Frank Daniel Steffen — Max-Planck-Institut für Physik, Föhringer Ring 6, D-80805 München, Deutschland
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 107 GeV taking into account bound-state effects on the primordial 6Li 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.