6533b855fe1ef96bd12b083a
RESEARCH PRODUCT
Neutrino masses from new generations
Nuria RiusAlberto ApariciArcadi SantamariaJuan Herrero-garciasubject
PhysicsNuclear and High Energy PhysicsParticle physicsLarge Hadron ColliderHigh Energy Physics::PhenomenologyYukawa potentialFísicaFOS: Physical sciencesObservableParameter spaceUniversality (dynamical systems)High Energy Physics - PhenomenologyMAJORANAHigh Energy Physics - Phenomenology (hep-ph)Double beta decayHigh Energy Physics::ExperimentNeutrinodescription
We reconsider the possibility that Majorana masses for the three known neutrinos are generated radiatively by the presence of a fourth generation and one right-handed neutrino with Yukawa couplings and a Majorana mass term. We find that the observed light neutrino mass hierarchy is not compatible with low energy universality bounds in this minimal scenario, but all present data can be accommodated with five generations and two right-handed neutrinos. Within this framework, we explore the parameter space regions which are currently allowed and could lead to observable effects in neutrinoless double beta decay, $\mu - e$ conversion in nuclei and $\mu \rightarrow e \gamma$ experiments. We also discuss the detection prospects at LHC.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2011-04-20 | Journal of High Energy Physics |