Minimal See-Saw Model for Atmospheric and Solar Neutrino Oscillations

Details Minimal See-Saw Model for Atmospheric and Solar Neutrino Oscillations Minimal See-Saw Model for Atmospheric and Solar Neutrino Oscillations

1998-11-06

arxiv.org/abs/hep-ph/9811266v1

Phys.Rev. D59 (1999) 097702

Physics

High Energy Physics

High Energy Physics - Phenomenology

14 pages, latex, no figures

Scientific paper

10.1103/PhysRevD.59.097702

We present a minimal see-saw model based on an extension of the standard model (SM) which includes an additional U(1), with gauge charge $B - \frac{3}{2} (L_\mu + L_\tau)$. Requirement of anomaly cancellation implies the existence of two right-handed singlet neutrinos, carrying this gauge charge, which have normal Dirac couplings to $\nu_\mu$ and $\nu_\tau$ but suppressed ones to $\nu_e$. Assuming the U(1) symmetry breaking scale to be 10$^{12-16}$~GeV, this model can naturally account for the large (small) mixing solutions to the atmospheric (solar) neutrino oscillations.

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