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- W2016498770 abstract "The PMNS neutrino mixing matrix U_{PMNS} is in general a product of two unitary matrices U_{lep} and U_{nu} arising from the diagonalization of the charged lepton and neutrino mass matrices, U_{PMNS} = U^{dagger}_{lep} U_{nu}. Assuming that U_{nu} is a bimaximal mixing matrix, we investigate the possible forms of U_{lep}. We identify three possible generic structures of U_{lep}, which are compatible with the existing data on neutrino mixing. One corresponds to a hierarchical ``CKM-like'' matrix. In this case relatively large values of the solar neutrino mixing angle theta_{sol}, and of |U_{e3}|^2, are typically predicted, tan^2theta_{sol} gtap 0.42, |U_{e3}|^2 gtap 0.02, while the atmospheric neutrino mixing angle theta_{atm} can deviate noticeably from pi/4, sin^2 2theta_{atm} gtap 0.95. The second corresponds to one of the mixing angles in U_{lep} being equal to pi/2, and predicts practically maximal atmospheric neutrino mixing sin^2 2theta_{atm} simeq 1. Large atmospheric neutrino mixing, sin^2 2theta_{atm} gtap 0.95, is naturally predicted by the third possible generic structure of U_{lep}, which corresponds to all three mixing angles in U_{lep} being large. We focus especially on the case of CP-nonconservation, analyzing it in detail. We show how the CP-violating phases, arising from the diagonalization of the neutrino and charged lepton mass matrices, contribute to the measured neutrino mixing observables." @default.
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- W2016498770 date "2004-05-01" @default.
- W2016498770 modified "2023-10-14" @default.
- W2016498770 title "On deviations from bimaximal neutrino mixing" @default.
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- W2016498770 doi "https://doi.org/10.1016/j.nuclphysb.2004.03.014" @default.
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