Soft Leptogenesis and Gravitino Dark Matter in Gauge Mediation
High Energy Physics - Phenomenology
2011-04-06 v2
Abstract
We study soft leptogenesis in gauge mediated supersymmetry breaking models with an enhanced A-term for the right-handed neutrino. We find that this scenario can explain the baryon asymmetry of the present universe, consistently with the gravitino dark matter for a wide range of gravitino mass m_{3/2}=O(MeV)-O(GeV). We also propose an explicit model which induces the necessary A-term for the right-handed neutrino.
Keywords
Cite
@article{arxiv.1007.3323,
title = {Soft Leptogenesis and Gravitino Dark Matter in Gauge Mediation},
author = {Koichi Hamaguchi and Norimi Yokozaki},
journal= {arXiv preprint arXiv:1007.3323},
year = {2011}
}
Comments
13 pages, 2 figures, references are added, the version to appear in PLB