Gravitational leptogenesis in Natural Inflation
Cosmology and Nongalactic Astrophysics
2017-12-20 v2 High Energy Physics - Phenomenology
High Energy Physics - Theory
Abstract
We compute the gravitational leptogenesis generated from the parity-violating gravitational waves sourced by an abelian gauge field coupled to a pseudo-scalar inflation. We show that, once the CMB bound on the tensor-to-scalar ratio is enforced, the lepton asymmetry produced by this mechanism during inflation is too small to account for the observed baryon asymmetry of the universe, irrespectively of the inflaton potential, the strength of its coupling to the gauge field, and the details of reheating.
Keywords
Cite
@article{arxiv.1708.08007,
title = {Gravitational leptogenesis in Natural Inflation},
author = {Alexandros Papageorgiou and Marco Peloso},
journal= {arXiv preprint arXiv:1708.08007},
year = {2017}
}
Comments
18 pages, 2 figures; published version