Note on Thermalization of Non-resonantly Produced Sterile Neutrinos
High Energy Physics - Phenomenology
2020-10-05 v2 Cosmology and Nongalactic Astrophysics
High Energy Physics - Experiment
Abstract
Using an analytic treatment, we discuss the parameter regions of large active-sterile neutrino mixing angles where sterile neutrinos produced in non-resonant flavour oscillations can approach thermalization in several cosmologies. We show that thermalization affects only large active-sterile neutrino mixing already rejected by different limits. Hence, the allowed sterile neutrino parameter regions are unaffected.
Keywords
Cite
@article{arxiv.2006.09553,
title = {Note on Thermalization of Non-resonantly Produced Sterile Neutrinos},
author = {Graciela B. Gelmini and Philip Lu and Volodymyr Takhistov},
journal= {arXiv preprint arXiv:2006.09553},
year = {2020}
}
Comments
15 pages, 2 figures; v2: improved treatment of smaller sterile mass regions, added CMB limits