6533b835fe1ef96bd12a00cd
RESEARCH PRODUCT
Tri-bimaximal neutrino mixing and neutrinoless double beta decay
Stefano MorisiMartin S. HirschJosé W. F. Vallesubject
PhysicsNuclear and High Energy PhysicsParticle physicsFísicaFOS: Physical sciencesTree (descriptive set theory)MAJORANAHigh Energy Physics - PhenomenologyHigh Energy Physics - Phenomenology (hep-ph)Double beta decayCP violationSensitivity (control systems)NeutrinoNeutrino oscillationLeptondescription
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.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2008-01-01 |