  Conventionally, neutrino masses in a supersymmetric theory arise from
non-renormalizable lepton-number (L)-violating operators in the superpotential.
The alternative possibility of having such operators in the Kahler potential as
the dominant source of neutrino masses has very interesting implications and
differences with respect to the standard scenario: first, the scale of
L-violation can be lowered dramatically and neutrino masses have a different
tan beta-dependence; second, the renormalization of these operators has
remarkable properties: in many cases it improves drastically the stability of
neutrino textures against radiative corrections, while in others it makes
possible to generate radiatively large mixing angles in a natural way. In
particular, the mass splitting and mixing angle of solar neutrinos (LAMSW
solution) can be explained as a purely radiative effect.
