Abstract
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 × H νCP symmetries in the charged lepton and neutrino sectors, respectively, H νCP 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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ArXiv ePrint: 1705.00309
Also at: Institute of Nuclear Research and Nuclear Energy, Bulgarian Academy of Sciences, 1784 Sofia, Bulgaria. (S.T. Petcov)
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Penedo, J., Petcov, S. & Titov, A. Neutrino mixing and leptonic CP violation from S4 flavour and generalised CP symmetries. J. High Energ. Phys. 2017, 22 (2017). https://doi.org/10.1007/JHEP12(2017)022
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DOI: https://doi.org/10.1007/JHEP12(2017)022