Models with a light sterile neutrino: reconciling the 17 keV anomaly with the solar neutrino deficit

Details Models with a light sterile neutrino: reconciling the 17 keV anomaly with the solar neutrino deficit Models with a light sterile neutrino: reconciling the 17 keV anomaly with the solar neutrino deficit

May 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992nuphb.375..649s&link_type=abstract

Nuclear Physics B, Volume 375, Issue 3, p. 649-664.

Physics

Nuclear Physics

15

Scientific paper

The recently reported spectral anomalies in tritium, 35S, 14C and 63Ni beta decays are consistent with the simplest explanation of the observed solar neutrino deficit as well as all other observations in particle physics, nuclear physics, cosmology and astrophysics. To show this we present simple SU(2) ⊗ U(1) models (with and without heavy leptons) where the νμ and ντ merge to form the 17 keV quasi-Dirac neutrino νS. The squared-mass difference between the light neutrinos can naturally lie in the range 10-4-10-10 eV2, thus explaining the solar neutrino data through νe --> n conversion, where n is a sterile lepton. The corresponding predictions for solar neutrinos are testable at upcoming installations. Improved laboratory searches for νe-->ντ conversion can test the consistency of the model. In our scheme the possibility that the mass of the νe is measurable experimentally may still be viable. The νS decays invisibly via Majoron emission, νS-->νlight + Majoron, with a lifetime that can easily be as short as ~107 s.
VALLE at EVALUN11 or 16444::VALLE.

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