Inflationary Birefringence and Baryogenesis
High Energy Physics - Theory
2016-11-23 v1 Cosmology and Nongalactic Astrophysics
General Relativity and Quantum Cosmology
High Energy Physics - Phenomenology
Abstract
A decade ago, the first leptogenesis model based on inflation was proposed, where the complex phase of the inflaton field carries lepton number. If the inflaton field is an axion, it can couple to gravitational waves and gauge fields via. Chern-Simons invariants. Due to these couplings, birefringent gravitational and gauge primordial perturbations are created during inflation to generate a lepton asymmetry, establishing a possible connection between non-vanishing TB-parity violating polarization cross-correlations and leptogenesis. We also discuss the prospect for a subset of these models can directly source circular (V-mode) polarization in the CMB.
Cite
@article{arxiv.1604.00703,
title = {Inflationary Birefringence and Baryogenesis},
author = {Stephon H. S. Alexander},
journal= {arXiv preprint arXiv:1604.00703},
year = {2016}
}
Comments
7 Pages, CPR 2015 Conference Proceedings