Evidence for B- -> tau- nu_tau-bar with a Hadronic Tagging Method Using   the Full Data Sample of Belle
  We measure the branching fraction of B- -> tau- nu_tau-bar using the full Upsilon(4S) data sample containing 772*10^6 BBbar pairs collected with the Belle detector at the KEKB asymmetric-energy e+e- collider. Events with BBbar pairs are tagged by reconstructing one of the B mesons decaying into hadronic final states, and B- -> tau- nu_tau-bar candidates are detected in the recoil. We find evidence for B- -> tau- nu_tau-bar with a significance of 3.0 standard deviations including systematic errors and measure a branching fraction B(B- -> tau- nu_tau-bar) = [0.72^{+0.27}_{-0.25}(stat) +/- 0.11(syst)] * 10^-4. 
Belle Collaboration: K. Hara, Y. Horii, T. Iijima, I. Adachi, H.   Aihara, D. M. Asner, T. Aushev, T. Aziz, A. M. Bakich, M....
hep-ex