Neutrino mass matrix with U(2) flavor symmetry and neutrino oscillations

The three neutrino mass matrices in the SU(5)XU(2) model are studied focusing on neutrino oscillation experiments. The atmospheric neutrino anomaly could be explained by a large nu(mu)-nu(tau) oscillation. The long baseline experiments are expected to detect signatures of the neutrino oscillation even if the atmospheric neutrino anomaly is not due to the neutrino oscillation. However, the model cannot solve the solar neutrino deficit while it could be reconciled with the LSND data.