Abstract
We reexamine the democratic neutrino mixing ansatz, in which the mass matrices of charged leptons and Majorana neutrinos arise, respectively, from the explicit breaking of S(3)L×S(3)R and S(3) flavor symmetries. It is shown that a democracy term in the neutrino sector can naturally allow the ansatz to fit the solar neutrino mixing angle θsun≈33°. We predict sin22θatm≈0.95 for atmospheric neutrino mixing and J≈1.2% for leptonic CP violation in neutrino oscillations without any fine-tuning. Direct relations between the model parameters and experimental observables are also discussed.
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