Bi-maximal mixing at GUT, the low energy data and the leptogenesis
  In the framework of the minimum supersymmetric model with right-handed neutrinos, we consider the Bi-maximal mixing which is realized at the GUT scale and discuss a question that this model can reproduce the low energy phenomena and the leptogenesis. 
S. Kanemura, K. Matsuda, H. Nakano, T. Ota, T. Shindou, E. Takasugi   and K. Tsumura