Freeze-In Dark Matter within the Seesaw mechanism
High Energy Physics - Phenomenology
2023-11-06 v3 Cosmology and Nongalactic Astrophysics
Abstract
We show that the minimal Type-I Seesaw mechanism can successfully account for the observed dark matter abundance in the form of a keV sterile neutrino. This population can be produced by the decay of the heavier neutral leptons, with masses above the Higgs mass scale, while they are in thermal equilibrium in the early Universe (freeze-in). Moreover, the implementation of the relevant phenomenological constraints (relic abundance, indirect detection and structure formation) on this model automatically selects a region of the parameter space featuring an approximate lepton number symmetry.
Keywords
Cite
@article{arxiv.2103.03253,
title = {Freeze-In Dark Matter within the Seesaw mechanism},
author = {Michele Lucente},
journal= {arXiv preprint arXiv:2103.03253},
year = {2023}
}
Comments
8 pages, 2 figures. v3: matches the version accepted for publication on Physics Letters B