Effects of reheating on leptogenesis

Details Effects of reheating on leptogenesis Effects of reheating on leptogenesis

2008-01-25

arxiv.org/abs/0801.3972v1

Nucl.Phys.B806:68-83,2009

Physics

High Energy Physics

High Energy Physics - Phenomenology

Scientific paper

10.1016/j.nuclphysb.2008.07.032

We study the evolution of a cosmological baryon asymmetry in leptogenesis when the right-handed neutrinos are produced in inflaton decays. By performing a detailed numerical study over a broad range of inflaton-neutrino couplings we show that the resulting asymmetry can be larger by two orders of magnitude or more than in thermal leptogenesis, if the reheating temperature T_{RH} is of the same order as the right-handed neutrino mass M_1. Hence, the lower limit on the baryogenesis temperature obtained in thermal leptogenesis can be relaxed accordingly.

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