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RESEARCH PRODUCT
Predicting Neutrinoless Double Beta Decay
A. Villanova Del MoralMartin HirschErnest MaErnest MaJosé W. F. Vallesubject
PhysicsNuclear and High Energy PhysicsParticle physicsHigh Energy Physics::PhenomenologyFOS: Physical sciencesFísicaUpper and lower boundsMAJORANAHigh Energy Physics - PhenomenologyEffective mass (solid-state physics)AmplitudeHigh Energy Physics - Phenomenology (hep-ph)Double beta decayCP violationHigh Energy Physics::ExperimentNeutrinoSimple variantdescription
We give predictions for the neutrinoless double beta decay rate in a simple variant of the A_4 family symmetry model. We show that there is a lower bound for the neutrinoless double beta decay amplitude even in the case of normal hierarchical neutrino masses, corresponding to an effective mass parameter |m_{ee}| >= 0.17 \sqrt{\Delta m^2_{ATM}}. This result holds both for the CP conserving and CP violating cases. In the latter case we show explicitly that the lower bound on |m_{ee}| is sensitive to the value of the Majorana phase. We conclude therefore that in our scheme, neutrinoless double beta decay may be accessible to the next generation of high sensitivity experiments.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2005-07-12 |