S_4 Flavored CP Symmetry for Neutrinos

A generalized CP symmetry for leptons is presented where CP transformations are part of an $S_4$ symmetry that connects different families. We study its implications for lepton mixings in a gauge model realization of the idea using type II seesaw for neutrino masses. The model predicts maximal atmospheric mixing, nonzero $θ_{13}$ and maximal Dirac phase $δ_{D}= \pmπ/2$.

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