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Kenji Kadota
순수물리이론 연구단
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Sterile neutrino dark matter from right-handed neutrino oscillations

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Title
Sterile neutrino dark matter from right-handed neutrino oscillations
Author(s)
Kenji Kadota; Kunio Kaneta
Publication Date
2018-06
Journal
PHYSICAL REVIEW D, v.97, no.11, pp.115021 -
Publisher
American Physical Society
Abstract
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. © 2018 authors. Published by the American Physical Society
URI
https://pr.ibs.re.kr/handle/8788114/4966
ISSN
2470-0010
Appears in Collections:
Center for Fundamental Theory(순수물리이론 연구단) > Journal Papers (저널논문)
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