Sommaire:

The addition of heavy right-handed neutrinos to the Standard Model is the simplest way of explaining the existence of neutrino masses. Even when they are too heavy to be produced in experiments, it is still possible to probe their existence since their mixing with the light neutrinos generates deviations from unitarity in the leptonic mixing matrix. These non-unitarity effects can lead to deviations in several low-energy precision observables or to charged lepton flavor violating (cLFV) processes. In this talk, I will review the global fit procedure carried out to extract bounds on heavy neutrino mixing and I will provide the most up-to-date bounds for several heavy neutrino scenarios. These bounds are the strongest for heavy neutrinos above the electroweak scale.

Pour plus d'informations, merci de contacter Frigerio M.