Flavour Issues in Leptogenesis
High Energy Physics - Phenomenology
2009-11-11 v3
Abstract
We study the impact of flavour in thermal leptogenesis, including the quantum oscillations of the asymmetries in lepton flavour space. In the Boltzmann equations we find different numerical factors and additional terms which can affect the results significantly. The upper bound on the CP asymmetry in a specific flavour is weaker than the bound on the sum. This suggests that -- when flavour dynamics is included -- there is no model-independent limit on the light neutrino mass scale,and that the lower bound on the reheat temperature is relaxed by a factor ~ (3 - 10).
Cite
@article{arxiv.hep-ph/0601083,
title = {Flavour Issues in Leptogenesis},
author = {A. Abada and S. Davidson and F-X. J. Michaux and M. Losada and A. Riotto},
journal= {arXiv preprint arXiv:hep-ph/0601083},
year = {2009}
}
Comments
19 pages, corrected equations for flavour oscillations