Ghiglieri, J.; Laine, M. (2020). Sterile neutrino dark matter via coinciding resonances. Journal of cosmology and astroparticle physics, 2020(07), 012-012. Institute of Physics Publishing IOP 10.1088/1475-7516/2020/07/012
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Ghiglieri_2020_J._Cosmol._Astropart._Phys._2020_012.pdf - Published Version Restricted to registered users only Available under License Publisher holds Copyright. Download (2MB) |
It has been proposed that two resonances could coincide in the early universe at temperatures T ∼ 0.2...0.5GeV: one between two nearly degenerate GeV-scale ster- ile neutrinos, producing a large lepton asymmetry through freeze-out and decays; another between medium-modified active neutrinos and keV-scale sterile neutrinos, converting the lepton asymmetry into dark matter. Making use of a framework which tracks three ster- ile neutrinos of both helicities as well as three separate lepton asymmetries, and scanning the parameter space of the GeV-scale species, we establish the degree of fine-tuning that is needed for realizing this scenario.
Item Type: |
Journal Article (Original Article) |
|---|---|
Division/Institute: |
10 Strategic Research Centers > Albert Einstein Center for Fundamental Physics (AEC) 08 Faculty of Science > Institute of Theoretical Physics |
UniBE Contributor: |
Laine, Mikko Sakari |
Subjects: |
500 Science > 530 Physics |
ISSN: |
1475-7516 |
Publisher: |
Institute of Physics Publishing IOP |
Language: |
English |
Submitter: |
Esther Fiechter |
Date Deposited: |
05 Aug 2020 15:54 |
Last Modified: |
05 Dec 2022 15:39 |
Publisher DOI: |
10.1088/1475-7516/2020/07/012 |
ArXiv ID: |
2004.10766 |
BORIS DOI: |
10.7892/boris.145600 |
URI: |
https://boris.unibe.ch/id/eprint/145600 |
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