A Minimal See - Saw Model for Hierarchical Neutrino Masses with Large Mixing
نویسنده
چکیده
The atmospheric and solar neutrino oscillation data suggest hierarchical neutrino masses with at least one large mixing. The simplest seesaw models for reconciling the two features are U (1) extensions of the SM with flavour dependent gauge charges. I discuss a minimal model of this type containing two heavy right-handed neutrinos, which have normal Dirac couplings to ν µ and ν τ but suppressed ones to ν e. It can naturally account for the large (small) mixing solutions to the atmospheric (solar) neutrino oscillation data.
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