Sterile neutrino dark matter via coinciding resonances - Archive ouverte HAL
Article Dans Une Revue Journal of Cosmology and Astroparticle Physics Année : 2020

Sterile neutrino dark matter via coinciding resonances

Résumé

It has been proposed that two resonances could coincide in the early universe at temperatures T ∼ 0.2 &ldots; 0.5 GeV: one between two nearly degenerate GeV-scale sterile 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 sterile 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.

Dates et versions

hal-02564654 , version 1 (05-05-2020)

Identifiants

Citer

J. Ghiglieri, M. Laine. Sterile neutrino dark matter via coinciding resonances. Journal of Cosmology and Astroparticle Physics, 2020, 07, pp.012. ⟨10.1088/1475-7516/2020/07/012⟩. ⟨hal-02564654⟩
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