Fermion mass hierarchy and lepton flavor violation using CP symmetry

Ganguly, Joy (2022) Fermion mass hierarchy and lepton flavor violation using CP symmetry. International Journal of Modern Physics A, 37 (15). ISSN 0217-751X

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Abstract

In this paper, we present a model which employs CP × Z3 symmetries where quark mixing and charged leptons masses are explained by following some texture. To achieve neutrino mass and mixing, we write a nonrenormalizable Lagrangian using type II seesaw mechanism by assuming (1) couplings predicting no CP violation. Then, we calculate the value of the couplings for both normal and inverted ordering of neutrino masses. We propose a mechanism of ultraviolet (UV) completion that motivates the higher-dimensional Lagrangian in the neutrino sector. We also calculate the branching fraction of lepton flavor violating decays driven by triplet scalar for the model. Later, it is shown that the model can also accommodate maximal CP violation by breaking the CP symmetry spontaneously. © 2022 World Scientific Publishing Company.

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