Phenomenological Analysis of Lepton and Quark Mass Matrices

We propose a model that all quark and lepton mass matrices originally have the same zero texture. Namely their (1,1), (1,3) and (3,1) components are zeros. For the neutrino mass matrix, we further impose the symmetry between the second and the third generations. Then the neutrino mass matrix has a maximal (\nu_\mu) - (\nu_\tau) mixing. Our model is consistent with all the neutrino oscillation experiments and the experimental data in the quark sector too. The neutrino mass matrix can also be well incorporated with the seesaw mechanism.