Insensitivity of flavoured leptogenesis to low energy CP violation
High Energy Physics - Phenomenology
2008-11-26 v3
Abstract
If the baryon asymmetry of the Universe is produced by leptogenesis, CP violation is required in the lepton sector. In the seesaw extension of the Standard Model with three hierarchical right-handed neutrinos, we show that the baryon asymmetry is insensitive to the PMNS phases: thermal leptogenesis can work for any value of the observable phases. This result was well-known when there are no flavour effects in leptogenesis; we show that it remains true when flavour effects are included.
Keywords
Cite
@article{arxiv.0705.1503,
title = {Insensitivity of flavoured leptogenesis to low energy CP violation},
author = {Sacha Davidson and Julia Garayoa and Federica Palorini and Nuria Rius},
journal= {arXiv preprint arXiv:0705.1503},
year = {2008}
}
Comments
4 pages, 1 figure; version accepted for publication, added explanations, notation clarified