Flavor Violating Axions in the Early Universe

Autor:	D'Eramo, Francesco, Yun, Seokhoon
Rok vydání:	2021
Předmět:	High Energy Physics - Phenomenology Astrophysics - Cosmology and Nongalactic Astrophysics
Zdroj:	Phys. Rev. D 105 (2022), 075002
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevD.105.075002
Popis:	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. Comment: 6 pages, 4 figures, journal version
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2111.12108 Zobrazit plný text záznamu View this record from Arxiv