Phase contribution to LFV
  We analyze the phase effect of the neutrino Yukawa matrix in the context of the Minimal Supersymmetric Standard Model with right-handed neutrinos. Its effect can change the Lepton Flavor Violation branching ratios by a few order of magnitude. 
S. Kanemura, K. Matsuda, T. Ota, T. Shindou, E. Takasugi and K.   Tsumura