Speaker: Harald Fritzsch (University of Munich)

Title: Flavor Symmetries, Quark Masses, Neutrino Masses and 
Neutrino Oscillations

Abstract: 
In the Standard Model there are 28 fundamental constants, like 
the fine structure constant. 22 of these constants are given by 
the lepton and quark masses, and the related flavor mixing 
parameters. In the SO(10) Grand Unified Theory one can arrange 
the fermions such that simple reflection symmetries determine 
the flavor mixing parameters in terms of the mass eigenvalues. 
I will discuss the success of such a model for the quarks. I 
apply the same idea to the leptons. Using the experimental 
values for the angles, describing the neutrino oscillations, 
I can calculate the neutrino masses. The are very small. The 
mass of the third neutrino is 0.05 eV. It will be very difficult 
to find an effect in the neutrinoless double beta decay. One 
prediction can soon be checked in reactor neutrino experiments.