A T' modular-symmetry model with a 'weighton' scalar reproduces neutrino oscillation data within 3σ and gives predictions for neutrinoless double beta decay and leptogenesis.
Froggatt-Nielsen hierarchy and the neutrino mass matrix
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abstract
We study the neutrino mass matrix derived from the seesaw mechanism in which the neutrino Yukawa couplings and the heavy Majorana neutrino mass matrix are controlled by the Froggatt-Nielsen mechanism. In order to obtain the large neutrino mixings, two Froggatt-Nielsen fields are introduced with a complex vacuum expectation values. As a by-product, CP violation is systematically induced even if the order one couplings of FN fields are real. We show several predictions of this model, such as theta_{13}, the Dirac CP phase, two Majorana CP phases, the effective mass of the neutrinoless double beta decay and the leptogenesis. The prediction of the branching ratio of mu to e+gamma is also given in SUSY model.
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Froggatt-Nielsen like mechanism in the framework of Modular Symmetry for Neutrino Mass, Mixing and Leptogenesis
A T' modular-symmetry model with a 'weighton' scalar reproduces neutrino oscillation data within 3σ and gives predictions for neutrinoless double beta decay and leptogenesis.