A Model for Neutrino Warm Dark Matter and Neutrino Oscillations

Details A Model for Neutrino Warm Dark Matter and Neutrino Oscillations A Model for Neutrino Warm Dark Matter and Neutrino Oscillations

2001-02-20

arxiv.org/abs/hep-ph/0102246v3

Phys.Lett. B512 (2001) 247-251

Physics

High Energy Physics

High Energy Physics - Phenomenology

11 pages, Final version to appear in PLB, References added

Scientific paper

10.1016/S0370-2693(01)00730-4

The muon- and tau-neutrinos with the mass in the keV range, which are allowed in a low reheating temperature cosmology, can compose the warm dark matter of the universe. A model of four light neutrinos including the keV scale $\nu_\mu$ and $\nu_\tau$ is studied, which combines the seesaw mechanism and the Abelian flavor symmetry. The atmospheric neutrino anomaly is due to the $\nu_\mu-\nu_\tau$ oscillation. The solar neutrino problem is answered by the oscillation into the light sterile neutrino, where the SMA, LMA, and LOW-QVO solutions can be accommodated in our scenario.

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