Minimal sterile neutrino dark matter
| Autor: | Torsten Bringmann, Paul Frederik Depta, Marco Hufnagel, Jörn Kersten, Joshua T. Ruderman, Kai Schmidt-Hoberg |
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| Jazyk: | angličtina |
| Rok vydání: | 2023 |
| Předmět: |
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 |
| Zdroj: | Physical Review Physical review / D 107(7), L071702 (2023). doi:10.1103/PhysRevD.107.L071702 |
| Popis: | 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 |
| Databáze: | OpenAIRE |
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