Neutrino Mass Textures and the Nature of New Physics Implied by Present Neutrino Data

Details Neutrino Mass Textures and the Nature of New Physics Implied by Present Neutrino Data Neutrino Mass Textures and the Nature of New Physics Implied by Present Neutrino Data

1997-02-03

arxiv.org/abs/hep-ph/9702229v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

Invited talk presented at the Neutrino'96 conference in Helsinki, Finland, June, 1996; 13 pages; To appear in the proceedings

Scientific paper

If all indications for neutrino oscillations observed in the solar, atmospheric neutrino data as well as in the LSND experiments are borne out by the ongoing and future experiments, then they severely constrain the neutrino mass texture. In particular, the need for an ultralight sterile neutrino is hard to avoid. Such ultralight neutrinos have profound implications not only for physics beyond the standard model but also perhaps for physics beyond the conventional grand unification. We discuss a scenario involving a parallel universe that interacts with the familiar universe only via gravitational interactions, where the ultralightness of the sterile neutrino follows from the same physics that explains the near masslessness of the familiar neutrinos.

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