We show that the supposed Majorana nature of neutrinos is intimately linked to the presence of large mixing angles between families. This follows simpy from Lorentz invariance in an extended (6-dimensional model).
The appraoch predicts in addition an "Inverted Hierarchy" between neutrino masses, mitigated however by a large "pseudo-Dirac" compensation, which limits the rate of neutrinoless...
Models for massive Majorana neutrinos in which lepton number is broken at (or near) the electroweak scale lead to direct testable experimental predictions. This talk concentrates on two classes of generic models: models in which neutrino masses arise via radiative corrections and supersymmetric models with broken R-parity. Special emphasis is put on their phenomenological implications, in...