


Mira, Jesús M.; Nardi, Enrico; Restrepo, Diego; Furtado Valle, José Wagner
Perfil 

This document is a artículoDate2000


Este documento está disponible también en :
http://hdl.handle.net/10550/47869


We study extensions of supersymmetric models without Rparity which include an anomalous U(1)_H horizontal symmetry. Bilinear Rparity violating terms induce a neutrino mass at tree level of approximately (θ2)δ eV where θ≈0.22 is the U(1)_H breaking parameter and δ is an integer number that depends on the horizontal charges of the leptons. For δ=1 a unique selfconsistent model arises in which i) all the superpotential trilinear Rparity violating couplings are forbidden by holomorphy; ii) the tree level neutrino mass falls in the range suggested by the atmospheric neutrino problem; iii) radiative contributions to neutrino masses are strongly suppressed resulting in a squared solar mass difference of few 10^{8} eV^2 which only allows for the LOW (or quasivacuum) solution to the solar neutrino problem; iv) the neutrino mixing angles are not suppressed by powers of θ and can naturally be large.


Mira, Jesús M. Nardi, Enrico Restrepo, Diego Furtado Valle, José Wagner 2000 Bilinear Rparity violation and small neutrino masses: A selfconsistent framework Physics Letters B 492 12 81 90 

http://dx.doi.org/10.1016/S03702693(00)010674
