Sommerfeld corrections to type-II and III leptogenesis
High Energy Physics - Phenomenology
2008-12-18 v2
Abstract
We study thermal leptogenesis from decays of the electroweak triplets that mediate neutrino masses in type-II and type-III see-saw. We find that Sommerfeld corrections reduce the baryon asymmetry by ~30%, and that successful leptogenesis needs triplets heavier than 1.6 TeV, beyond the discovery reach of LHC.
Keywords
Cite
@article{arxiv.0806.1630,
title = {Sommerfeld corrections to type-II and III leptogenesis},
author = {Alessandro Strumia},
journal= {arXiv preprint arXiv:0806.1630},
year = {2008}
}
Comments
12 pages, 4 figures, final version. The group theory of the non-abelian Sommerfeld effect presented in this paper can be relevant for scenarios of Dark Matter charged under new dark gauge groups, as suggested by recent data