Sterile neutrino dark matter via coinciding resonances

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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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:

09 Aug 2020 02:43

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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