Anomaly-free flavor symmetry and neutrino anarchy - art. no. 057302

We show that one can describe the quark and lepton masses with a single ano maly-free U(1) flavor symmetry provided a single order one parameter is enh anced by roughly 4-5. The flavor symmetry can be seen to arise from inside the E-6 symmetry group in such a way that it commutes with the SU(5) grand unified gauge group. The scenario does not distinguish between the left-han ded lepton doublers and hence is a model of neutrino anarchy. It can theref ore account for the large mixing observed in atmospheric neutrino experimen ts and predicts that the solar neutrino oscillation data are consistent wit h the large mixing angle solution of matter-enhanced oscillations.