7 keV sterile neutrino dark matter from split flavor mechanism

Abstract

The recently discovered X-ray line at about $3.5$keV can be explained by sterile neutrino dark matter with mass, $m_s\simeq 7$keV, and the mixing, ${\sin }^{2}2\theta \sim 10^{-10}$. Such sterile neutrino is more long-lived than estimated based on the seesaw formula, which strongly suggests an extra flavor structure in the seesaw sector. We show that one can explain both the small mass and the longevity based on the split flavor mechanism where the breaking of flavor symmetry is tied to the breaking of the $B-L$ symmetry. In a supersymmetric case we find that the $7$keV sterile neutrino implies the gravitino mass about $100$TeV.

14 pages, 1 figure

References in corpus (6)

• Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC
• Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC
• Dark-matter sterile neutrinos in models with a gauge singlet in the Higgs sector
• A lower bound on the mass of Dark Matter particles
• Sterile neutrino dark matter in $B-L$ extension of the standard model and galactic 511 keV line
• MeV sterile neutrinos in low reheating temperature cosmological scenarios

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