Note on Thermalization of Non-resonantly Produced Sterile Neutrinos

Graciela B. Gelmini; Philip Lu; Volodymyr Takhistov

Note on Thermalization of Non-resonantly Produced Sterile Neutrinos

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arxiv 2006.09553 v2 pith:3ILYVFPG submitted 2020-06-16 hep-ph astro-ph.COhep-ex

Graciela B. Gelmini , Philip Lu , Volodymyr Takhistov This is my paper

classification hep-phastro-ph.COhep-ex

keywords neutrinosterilethermalizationactive-sterilelargemixingneutrinosparameter

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Using an analytic treatment, we discuss the parameter regions of large active-sterile neutrino mixing angles where sterile neutrinos produced in non-resonant flavour oscillations can approach thermalization in several cosmologies. We show that thermalization affects only large active-sterile neutrino mixing already rejected by different limits. Hence, the allowed sterile neutrino parameter regions are unaffected.

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Multiple Populations of Same Sterile Neutrino as Dark Matter
hep-ph 2025-07 conditional novelty 6.0 of 10

A single sterile neutrino species can be produced by multiple early-universe mechanisms, yielding cold and warm dark matter populations with a two-humped momentum spectrum.

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