Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2007-03-28
Adv.HighEnergyPhys.2007:39676,2007
Physics
High Energy Physics
High Energy Physics - Phenomenology
19 pages; V2 Version to appear in Advances in High Energy Physics
Scientific paper
10.1155/2007/39676
We compute the effect of non diagonal neutrino mass in l_i -> l_j gamma in SUSY theories with non trivial Quark-Lepton complementarity and a flavor symmetry. The correlation matrix V_M=U_{CKM}U_{PMNS} is such that its (1,3) entry, as preferred by the present experimental data, is zero. We do not assume that $V_M$ is bimaximal. Quark-Lepton complementarity and the flavor symmetry strongly constrain the theory and we obtain a clear prediction for the contribution to mu -> e gamma and the tau decays tau -> e gamma and tau -> mu gamma. If the Dirac neutrino Yukawa couplings are degenerate but the low energy neutrino masses are not degenerate, then the lepton decays are related among them by the V_M entries. On the other hand, if the Dirac neutrino Yukawa couplings are hierarchical or the low energy neutrino masses are degenerate, then the prediction for the lepton decays comes from the U_{CKM} hierarchy.
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