Sterile neutrino dark matter from right-handed neutrino oscillations

Kenji Kadota, Kunio Kaneta

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2 Scopus citations


We study a scenario where sterile neutrino (either warm or cold) dark matter (DM) is produced through (nonresonant) oscillations among right-handed neutrinos (RHNs) and can constitute the whole DM in the Universe, in contrast to the conventional sterile neutrino production through its mixing with the left-handed neutrinos. The lightest RHN can be sterile neutrino DM whose mixing with left-handed neutrinos is sufficiently small while heavier RHNs can have non-negligible mixings with left-handed neutrinos to explain the neutrino masses by the seesaw mechanism. We also demonstrate that, in our scenario, the production of sterile RHN DM from the decay of a heavier RHN is subdominant compared with the RHN oscillation production due to the x-ray and small-scale structure constraints.

Original languageEnglish (US)
Article number115021
JournalPhysical Review D
Issue number11
StatePublished - Jun 13 2018

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© 2018 authors. Published by the American Physical Society.


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