Flavour problem, proton decay and neutrino oscillations in SUSY models with anomalous U(1)

by Zurab TAVARTKILADZE (Institute of Physics, Georgia)

Friday 18 Feb 2000, 14:00 → 14:15 Europe/Zurich

TH Auditorium (CERN)

I will speak about puzzles of MSSM and its other extensions. We consider a scenario which simultaneously solves all mentioned problems. The central role in our approach plays anomalous U(1) symmetry. Using this U(1) as a mediator of SUSY breaking and flavour group, we gain the understanding of a wide range of phenomenology. Namely, the flavour changing neutral currents as well as dimension five nucleon decay are naturally suppressed; hierarchies between the charged fermion masses and magnitudes of CKM matrix elements are explained; atmospheric and solar neutrino anomalies are simultaneously resolved (with various possible oscillation scenarios). The general features, some of the predictions and phenomenological implications of the models, in which framework the presented scenario takes place, will be discussed. For a transparent demonstration of the suggested mechanisms an explicit example of SUSY SU(5) GUT will be presented.