Flavor Violating Axions in the Early Universe
High Energy Physics - Phenomenology
2022-04-08 v3 Cosmology and Nongalactic Astrophysics
Abstract
Flavor violating axion couplings can be in action before recombination, and they can fill the early universe with an additional radiation component. Working within a model-independent framework, we consider an effective field theory for the axion field and quantify axion production. Current cosmological data exclude already a fraction of the available parameter space, and the bounds will improve significantly with future CMB-S4 surveys. Remarkably, we find that future cosmological bounds will be comparable or even stronger than the ones obtained in our terrestrial laboratories.
Keywords
Cite
@article{arxiv.2111.12108,
title = {Flavor Violating Axions in the Early Universe},
author = {Francesco D'Eramo and Seokhoon Yun},
journal= {arXiv preprint arXiv:2111.12108},
year = {2022}
}
Comments
6 pages, 4 figures, journal version