Leptogenesis from Supersymmetry Breaking
High Energy Physics - Phenomenology
2008-11-26 v2
Abstract
We show that soft supersymmetry breaking terms involving the heavy sneutrinos can lead to sneutrino-antisneutrino mixing and to new sources of CP violation, which are present even if a single generation is considered. These terms are naturally present in supersymmetric versions of leptogenesis scenarios, and they induce indirect CP violation in the decays of the heavy sneutrinos, eventually generating a baryon asymmetry. This new contribution can be comparable to or even dominate over the asymmetry produced in traditional leptogenesis scenarios.
Cite
@article{arxiv.hep-ph/0307081,
title = {Leptogenesis from Supersymmetry Breaking},
author = {Yuval Grossman and Tamar Kashti and Yosef Nir and Esteban Roulet},
journal= {arXiv preprint arXiv:hep-ph/0307081},
year = {2008}
}
Comments
4 pages; An improved discussion of the relevant numerical range of the soft breaking terms (in agreement with hep-ph/0308031)