Longevity problem of sterile neutrino dark matter

Hiroyuki Ishida, Kwang Sik Jeong, Fuminobu Takahashi

研究成果: Article

12 引用 (Scopus)


Sterile neutrino dark matter of mass O(1-10) keV decays into an active neutrino and an X-ray photon, and the non-observation of the corresponding X-ray line requires the sterile neutrino to be more long-lived than estimated based on the seesaw formula: the longevity problem. We show that, if one or more of the B-L Higgs fields are charged under a flavor symmetry (or discrete R symmetry), the split mass spectrum for the right-handed neutrinos as well as the required longevity is realized. We provide several examples in which the predicted X-ray flux is just below the current bound.

ジャーナルPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
出版物ステータスPublished - 2014 4 4

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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