Neutral B Flavor Tagging for the Measurement of Mixing-induced CP   Violation at Belle
  We describe a flavor tagging algorithm used in measurements of the CP violation parameter sin2phi_1 at the Belle experiment. Efficiencies and wrong tag fractions are evaluated using flavor-specific B meson decays into hadronic and semileptonic modes. We achieve a total effective efficiency of $ 28.8 +- 0.6 %. 
H.Kakuno, K.Hara, B.C.K.Casey, K.-F.Chen, H.Hamasaki, M.Hazumi,   T.Iijima, N.Katayama, T.Okabe, Y.Sakai, K.Sumisawa, J.Suzu...