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Abstract: We study the neutrino mass matrix derived from the seesaw mechanism in whichthe neutrino Yukawa couplings and the heavy Majorana neutrino mass matrix arecontrolled by the Froggatt-Nielsen mechanism. In order to obtain the largeneutrino mixings, two Froggatt-Nielsen fields are introduced with a complexvacuum expectation values. As a by-product, CP violation is systematicallyinduced even if the order one couplings of FN fields are real. We show severalpredictions of this model, such as theta {13}, the Dirac CP phase, two MajoranaCP phases, the effective mass of the neutrinoless double beta decay and theleptogenesis. The prediction of the branching ratio of mu to e+gamma is alsogiven in SUSY model.



Autor: Hiroshi Kamikado, Tetsuo Shindou, Eiichi Takasugi

Fuente: https://arxiv.org/







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