Leptogenesis after superconformal subcritical hybrid inflation
High Energy Physics - Phenomenology
2019-10-02 v2 Cosmology and Nongalactic Astrophysics
High Energy Physics - Theory
Abstract
We consider an extended version of superconformal subcritical hybrid inflation model by introducing three right-handed neutrinos that have the Majorana mass terms. In the model one of the right-handed sneutrinos plays a role of the inflaton field, and it decays to reheat the universe after inflation. The vacuum expectation value for the waterfall field gives an unconventional pattern of the light neutrino mass matrix, and the neutrino Yukawa couplings that determine the reheating temperature are not constrained by the neutrino oscillation data. Consequently thermal leptogenesis or sneutrino leptogenesis is realized.
Keywords
Cite
@article{arxiv.1906.04530,
title = {Leptogenesis after superconformal subcritical hybrid inflation},
author = {Yoshihiro Gunji and Koji Ishiwata},
journal= {arXiv preprint arXiv:1906.04530},
year = {2019}
}
Comments
30 pages, 3 figures, minor corrections, published version