Doublet-Singlet Oscillations and Dark Matter Neutrinos

Details Doublet-Singlet Oscillations and Dark Matter Neutrinos Doublet-Singlet Oscillations and Dark Matter Neutrinos

1996-04-25

arxiv.org/abs/hep-ph/9604400v1

Phys.Lett. B388 (1996) 106-111; Phys.Lett. B389 (1996) 687-692

Physics

High Energy Physics

High Energy Physics - Phenomenology

14 pages, uses REVTEX macro

Scientific paper

10.1016/0370-2693(96)01164-1

We examine the `singlet majoron model' first introduced by Chikashige, Mohapatra and Peccei as a simple extension of the standard model with massive Majorana neutrinos. We can explain both the solar and the atmospheric neutrino deficits by the oscillations between electroweak doublet and singlet neutrinos without flavor mixing. Furthermore, while some light neutrinos can be the hot dark matter, tau neutrino with mass of 8.9-24 MeV can be the cold dark matter through the interaction with the majoron. Thus, we can simultaneously explain the solar neutrino deficit, the atmospheric neutrino anomaly, and the cold and hot dark matters only with the Majorana neutrinos.

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