Tri-bimaximal neutrino mixing and neutrinoless double beta decay

Abstract

We present a tri-bimaximal lepton mixing scheme where the neutrinoless double beta decay rate (bb0v) has a lower bound which correlates with the ratio alpha = Dmsol/Dmatm well determined by current data, as well as with the unknown Majorana CP phase phi12 characterizing the solar neutrino sub-system. For the special value phi12 = pi/2 (opposite CP-sign neutrinos) the bb0v rate vanishes at tree level when Dmsol/Dmatm = 3/80, only allowed at 3 sigma. For all other cases the rate is nonzero, and lies within current and projected experimental sensitivities close to phi12=0. We suggest two model realizations of this scheme in terms of an A4xZ2 and A4xZ4 flavour symmetries.

4 pages and 3 figures

References in corpus (2)

• A model for fermion masses and lepton mixing in SO(10) x A4
• Embedding the Zee-Wolfenstein neutrino mass matrix in an SO(10) x A4 GUT scenario

Cited by in corpus (5)

• A Simplest A4 Model for Tri-Bimaximal Neutrino Mixing
• Fermion masses and mixing in models with SO(10) x A_4 symmetry
• Resonant leptogenesis and tribimaximal leptonic mixing with A4 symmetry
• Neutrino masses and tribimaximal mixing in the minimal renormalizable supersymmetric SU(5) grand unified model with A4 flavor symmetry
• Theoretical Models of Neutrino Mixing: Recent Developments