S_3 flavor symmetry and neutrino mixing

por Jisuke Kubo (MPI, Munich and Institute for Theoretical Physics, Kanazawa University)

jueves 6 nov. 2003 12:00 → 13:00 Europe/Madrid

Sala Seminarios IFIC (Edf. Institutos de Investigación)

We assume that the permutation symmetry based on S_3, the smallest nonabelian group, is an exact flavor symmetry at the weak scale, and extend the standard model in a minimal fashion. We find that S_3 with an additional abeilan discrete symmetry in the leptonic sector allows only six real parameters besides one phase to describe charged lepton and neutrino masses and the neutrino mixing. The model predicts: an inverted spectrum of neutrino mass, the absence of CP violating Dirac phase, theta_{23} is maximal, and theta_{13}=0.034.