1. Minimal sterile neutrino dark matter
- Author
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Torsten Bringmann, Paul Frederik Depta, Marco Hufnagel, Jörn Kersten, Joshua T. Ruderman, and Kai Schmidt-Hoberg
- Subjects
emission [X-ray] ,dark matter [neutrino] ,formation ,scattering ,High Energy Physics::Phenomenology ,density [dark matter] ,halo [dark matter] ,hep-ph ,dark matter: density ,neutrino: sterile ,oscillation ,sterile [neutrino] ,sensitivity ,dark matter: halo ,neutrino: dark matter ,X-ray: emission ,ddc:530 ,High Energy Physics::Experiment ,structure ,Particle Physics - Phenomenology - Abstract
Physical review / D 107(7), L071702 (2023). doi:10.1103/PhysRevD.107.L071702, We propose a novel mechanism to generate sterile neutrinos $\nu_s$ in the early Universe, by converting ordinary neutrinos $\nu_\alpha$ in scattering processes $\nu_s\nu_\alpha\to\nu_s\nu_s$. After initial production by oscillations, this leads to an exponential growth in the $\nu_s$ abundance. We show that such a production regime naturally occurs for self-interacting $\nu_s$, and that this opens up significant new parameter space where $\nu_s$ make up all of the observed dark matter. Our results provide strong motivation to further push the sensitivity of X-ray line searches, and to improve on constraints from structure formation., Published by Inst., Woodbury, NY
- Published
- 2023
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