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Neutrino mixing and leptonic CP violation from S 4 flavour and generalised CP symmetries

We consider a class of models of neutrino mixing with S4 lepton flavour symmetry combined with a generalised CP symmetry, which are broken to residual Z2 and Z2 × HCPν symmetries in the charged lepton and neutrino sectors, respectively, HCPν being a remnant CP symmetry of the neutrino Majorana mass...

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Published in:The journal of high energy physics 2017-12, Vol.2017 (12), p.1-57
Main Authors: Penedo, J T, Petcov, ST, Titov, A V
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Titov, A V
description We consider a class of models of neutrino mixing with S4 lepton flavour symmetry combined with a generalised CP symmetry, which are broken to residual Z2 and Z2 × HCPν symmetries in the charged lepton and neutrino sectors, respectively, HCPν being a remnant CP symmetry of the neutrino Majorana mass term. In this set-up the neutrino mixing angles and CP violation (CPV) phases of the neutrino mixing matrix depend on three real parameters — two angles and a phase. We classify all phenomenologically viable mixing patterns and derive predictions for the Dirac and Majorana CPV phases. Further, we use the results obtained on the neutrino mixing angles and leptonic CPV phases to derive predictions for the effective Majorana mass in neutrinoless double beta decay.
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subjects Beta decay
CP violation
Discrete Symmetries
Flavor (particle physics)
High energy physics
Leptons
Neutrino Physics
Neutrinos
Phases
Symmetry
title Neutrino mixing and leptonic CP violation from S 4 flavour and generalised CP symmetries
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