6533b852fe1ef96bd12ab8bc
RESEARCH PRODUCT
Underlying A_4 Symmetry for the Neutrino Mass Matrix and the Quark Mixing Matrix
José W. F. ValleErnest MaK. S. Babusubject
PhysicsTribimaximal mixingParticle physicsNuclear and High Energy PhysicsCabibbo–Kobayashi–Maskawa matrixHigh Energy Physics::PhenomenologyFOS: Physical sciencesFísicaMass matrixHigh Energy Physics - PhenomenologyHigh Energy Physics - Phenomenology (hep-ph)Double beta decayCP violationHigh Energy Physics::ExperimentNeutrinoNeutrino oscillationMixing (physics)description
The discrete non-Abelian symmetry $A_4$, valid at some high-energy scale, naturally leads to degenerate neutrino masses, without spoiling the hierarchy of charged-lepton masses. Realistic neutrino mass splittings and mixing angles (one of which is necessarily maximal and the other large) are then induced radiatively in the context of softly broken supersymmetry. The quark mixing matrix is also calculable in a similar way. The mixing parameter $U_{e3}$ is predicted to be imaginary, leading to maximal CP violation in neutrino oscillations. Neutrinoless double beta decay and $\tau \to \mu \gamma$ should be in the experimentally accessible range.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2002-06-28 |