Early Universe effective theories: The Soft Leptogenesis and R-Genesis Cases
Abstract
We discuss the effective theory appropriate for studying soft leptogenesis at temperatures T>10^7 GeV. In this regime, the main source of the B-L asymmetry is the CP asymmetry of a new anomalous R-charge that couple to generalized anomalous electroweak processes. Baryogenesis thus occurs mainly through R-genesis, and with an efficiency that can be up to two orders of magnitude larger than in usual estimates. Contrary to common belief, a sizeable baryon asymmetry is generated also when thermal corrections to the CP asymmetries in sneutrino decays are neglected which, in soft leptogenesis, implyes vanishing lepton-flavour CP asymmetries. We present general Boltzmann equations for soft leptogenesis that are valid in all temperature regimes.
Keywords
Cite
@article{arxiv.1012.1597,
title = {Early Universe effective theories: The Soft Leptogenesis and R-Genesis Cases},
author = {Chee Sheng Fong and M. C. Gonzalez-Garcia and Enrico Nardi},
journal= {arXiv preprint arXiv:1012.1597},
year = {2015}
}
Comments
41 pages, 5 figures, added 4 references