On fast CP violating interactions in leptogenesis
High Energy Physics - Phenomenology
2015-05-18 v2
Abstract
We show that when the relevant CP violating interactions in leptogenesis are fast, the different matter density asymmetries are determined at each instant by a balance condition between the amount of asymmetry being created and destroyed. This fact allows to understand in a simple way many features of leptogenesis in the strong washout regime. In particular, we find some non-trivial effects of flavour changing interactions that conserve lepton number, which are specially relevant in models for leptogenesis that rely heavily on flavour effects.
Cite
@article{arxiv.1004.2546,
title = {On fast CP violating interactions in leptogenesis},
author = {Chee Sheng Fong and J. Racker},
journal= {arXiv preprint arXiv:1004.2546},
year = {2015}
}
Comments
V2: To match published version in JCAP. Minor changes, including one figure, with respect to V1. 17 pages, 4 figures