P. S. Bhupal Dev, Apostolos Pilaftsis
We explore the possibility of light and superlight sterile neutrinos in the recently proposed Minimal Radiative Inverse Seesaw extension of the Standard Model for neutrino masses, in which all existing neutrino data can be explained. In particular, we discuss benchmark scenarios with two of the three light sterile neutrino states in the eV-range, possessing a nonzero mixing with the active states as required to explain the LSND + MiniBooNE + reactor neutrino data. The third sterile state could be either in the keV-range, having very small mixing with the active neutrinos to account for the Dark Matter in the Universe, or be superlight and almost mass-degenerate with the solar neutrinos. Such superlight sterile neutrinos could give rise to potentially observable effects in future neutrino oscillation experiments and may also offer a possible explanation for the extra radiation observed in the Universe.
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http://arxiv.org/abs/1212.3808
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