WIMPy Leptogenesis
High Energy Physics - Phenomenology
2014-02-06 v1 Cosmology and Nongalactic Astrophysics
Abstract
We consider a class of leptogenesis models in which the lepton asymmetry arises from dark matter annihilation processes which violate CP and lepton number. Importantly, a necessary one-loop contribution to the annihilation matrix element arises from absorptive final state interactions. We elucidate the relationship between this one-loop contribution and the CP-violating phase. As we show, the branching fraction for dark matter annihilation to leptons may be small in these models, while still generating the necessary asymmetry.
Cite
@article{arxiv.1402.0930,
title = {WIMPy Leptogenesis},
author = {Patrick Stengel},
journal= {arXiv preprint arXiv:1402.0930},
year = {2014}
}
Comments
10 pages, 3 figures, to appear in the proceedings of The 10th International Symposium on Cosmology and Particle Astrophysics (CosPA2013)