E6 Unification with Bi-Large Neutrino Mixing
Masako Bando, Nobuhiro Maekawa
Abstract
A scenario of SO(10) grand unified theory (GUT) proposed by one of the authors is extended to E6 unification. This gives realistic quark and lepton mass matrices. In neutrino sector, the model reproduces large mixing angle (LMA) MSW solution as well as large mixing angle for atmospheric neutrino anomaly. In this model, right-handed down quark and left-handed lepton of the first and second generation belong to a single multiplet 27. This causes natural suppression of flavor changing neutral current(FCNC).
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