Effects of reheating on leptogenesis
High Energy Physics - Phenomenology
2008-11-26 v1
Abstract
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.
Cite
@article{arxiv.0801.3972,
title = {Effects of reheating on leptogenesis},
author = {F. Hahn-Woernle and M. Plumacher},
journal= {arXiv preprint arXiv:0801.3972},
year = {2008}
}