Annihilating Leptogenesis
Abstract
Leptogenesis is usually realized through decays of heavy particles. In this article we consider another possibility of generating a lepton asymmetry through annihilations of heavy particles. We demonstrate our idea with a realistic extension of the standard model containing a heavy doublet and a light singlet scalars in addition to right-handed neutrinos and Higgs triplets required for type-I+II seesaw of neutrino masses. We also clarify that this annihilating leptogenesis scenario can be naturally embedded in more fundamental theories, like left-right symmetric models or grand unified theories.
Keywords
Cite
@article{arxiv.0903.3473,
title = {Annihilating Leptogenesis},
author = {Pei-Hong Gu and Utpal Sarkar},
journal= {arXiv preprint arXiv:0903.3473},
year = {2009}
}
Comments
5 pages, 2 figures. A singlet scalar as dark matter is introduced to solve the flaw of the overabundant relic density in the original model. References added, typos corrected and title changed. Accepted by PLB