Generation of Large Lepton Asymmetries
High Energy Physics - Phenomenology
2009-10-30 v2
Abstract
We present here a realistic model to produce a very large lepton asymmetry L of 0.1 to 1, without producing a large baryon asymmetry. The model is based on the Affleck and Dine scenario, in which the field acquiring a large vacuum expectation value during inflation is a s-neutrino right. We require to be large enough for the electroweak symmetry to be spontaneously broken at all temperatures after inflation, with the consequent suppression of sphaleron transitions.
Cite
@article{arxiv.hep-ph/9709289,
title = {Generation of Large Lepton Asymmetries},
author = {J. A. Casas and Wai Yan Cheng and G. B. Gelmini},
journal= {arXiv preprint arXiv:hep-ph/9709289},
year = {2009}
}
Comments
17 pp., LaTex file plus one figure, added some references in the introduction