6533b7cffe1ef96bd1257d2b
RESEARCH PRODUCT
Leptonic Flavor-changing Z0 Decays in SU(2)xU(1) Theories with Right- handed Neutrinos
Karl SchilcherApostolos PilaftsisJ. G. Körnersubject
PhysicsNuclear and High Energy PhysicsParticle physicsRight handedElectroweak interactionHigh Energy Physics::PhenomenologyFOS: Physical sciencesHigh Energy Physics - PhenomenologyMAJORANAHigh Energy Physics - Phenomenology (hep-ph)High Energy Physics::ExperimentNeutrinoU-1FlavorSpecial unitary groupdescription
We analyze possible lepton-flavor-violating decays of the $Z^0$ particle in a minimal extension of the Standard Model, in which one right-handed neutral field for each family has been introduced. Such rare leptonic decays are induced by Majorana neutrinos at the first electroweak loop level and are generally not suppressed by the ordinary "see-saw" mechanism. In particular, we find that experimental bounds on branching ratios of the order of $10^{-5}-10^{-6}$ attainable at $LEP$ may impose constraints on lepton-flavor-mixing parameters and the masses of the heavy Majorana neutrinos.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1993-01-28 |