Lepton Flavor Violating Processes in Bi-maximal Texture of Neutrino   Mixings
  We investigate the lepton flavor violation in the framework of the MSSM with right-handed neutrinos taking the large mixing angle MSW solution in the quasi-degenerate and the inverse-hierarchical neutrino masses. We predict the branching ratio of $\mu \to e+\gamma$ processes assuming the degenerate right-handed Majorana neutrino masses. We find that the branching ratio in the quasi-degenerate neutrino mass spectrum is 100 times smaller than the ones in the inverse-hierarchical and the hierarchical neutrino spectra. We emphasize that the magnitude of $U_{e3}$ is one of important ingredients to predict BR($\mu \to e +\gamma $). The effect of the deviation from the complete-degenerate right-handed Majorana neutrino masses are also estimated. 
A. Kageyama, S. Kaneko, N. Shimoyama and M. Tanimoto