%V 97
%O © 2006 The American Physical Society
%D 2006
%X We present the first evidence of the decay B-->tau(-)nu(tau), using 414 fb(-1) of data collected at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. Events are tagged by fully reconstructing one of the B mesons in hadronic modes. We detect the signal with a significance of 3.5 standard deviations including systematics and measure the branching fraction to be B(B-->tau(-)nu(tau))=(1.79(-0.49)(+0.56)(stat)(-0.51)(+0.46)(syst))x10(-4). This implies that f(B)=0.229(-0.031)(+0.036)(stat)(-0.037)(+0.034)(syst) GeV and is the first direct measurement of this quantity.
%K DETECTOR, PHYSICS
%J PHYS REV LETT
%A K Ikado
%A K Abe
%A K Abe
%A I Adachi
%A H Aihara
%A K Akai
%A M Akemoto
%A D Anipko
%A K Arinstein
%A V Aulchenko
%A T Aushev
%A T Aziz
%A AM Bakich
%A V Balagura
%A M Barbero
%A A Bay
%A I Bedny
%A K Belous
%A U Bitenc
%A I Bizjak
%A A Bondar
%A A Bozek
%A M Bracko
%A TE Browder
%A P Chang
%A A Chen
%A WT Chen
%A Y Choi
%A S Cole
%A J Dalseno
%A M Danilov
%A M Dash
%A S Eidelman
%A D Epifanov
%A J Flanagan
%A S Fratina
%A K Furukawa
%A N Gabyshev
%A T Gershon
%A A Go
%A G Gokhroo
%A B Golob
%A A Gorisek
%A H Ha
%A J Haba
%A K Hara
%A T Hara
%A NC Hastings
%A K Hayasaka
%A H Hayashii
%A M Hazumi
%A L Hinz
%A T Hokuue
%A Y Hoshi
%A S Hou
%A WS Hou
%A N Iida
%A T Iijima
%A A Imoto
%A K Inami
%A A Ishikawa
%A H Ishino
%A R Itoh
%A M Iwasaki
%A Y Iwasaki
%A T Kamitani
%A JH Kang
%A SU Kataoka
%A N Katayama
%A H Kawai
%A T Kawasaki
%A H Kichimi
%A E Kikutani
%A HJ Kim
%A HO Kim
%A K Kinoshita
%A H Koiso
%A S Korpar
%A P Krizan
%A P Krokovny
%A R Kulasiri
%A R Kumar
%A CC Kuo
%A A Kuzmin
%A YJ Kwon
%A JS Lange
%A G Leder
%A J Lee
%A T Lesiak
%A A Limosani
%A SW Lin
%A D Liventsev
%A D Marlow
%A T Matsumoto
%A A Matyja
%A S McOnie
%A S Michizono
%A T Mimashi
%A W Mitaroff
%A K Miyabayashi
%A H Miyata
%A Y Miyazaki
%A R Mizuk
%A T Nagamine
%A I Nakamura
%A TT Nakamura
%A E Nakano
%A M Nakao
%A S Nishida
%A O Nitoh
%A S Noguchi
%A T Nozaki
%A S Ogawa
%A Y Ogawa
%A K Ohmi
%A T Ohshima
%A N Ohuchi
%A K Oide
%A T Okabe
%A S Okuno
%A SL Olsen
%A Y Onuki
%A W Ostrowicz
%A H Ozaki
%A P Pakhlov
%A CW Park
%A H Park
%A R Pestotnik
%A LE Piilonen
%A A Poluektov
%A M Rozanska
%A Y Sakai
%A T Schietinger
%A O Schneider
%A C Schwanda
%A K Senyo
%A ME Sevior
%A M Shapkin
%A H Shibuya
%A T Shidara
%A B Shwartz
%A V Sidorov
%A A Sokolov
%A A Somov
%A S Stanic
%A M Staric
%A H Stoeck
%A K Sumisawa
%A T Sumiyoshi
%A S Suzuki
%A O Tajima
%A F Takasaki
%A K Tamai
%A N Tamura
%A M Tanaka
%A M Tawada
%A GN Taylor
%A Y Teramoto
%A XC Tian
%A K Trabelsi
%A T Tsuboyama
%A T Tsukamoto
%A S Uehara
%A T Uglov
%A K Ueno
%A Y Unno
%A S Uno
%A Y Usov
%A G Varner
%A S Villa
%A CC Wang
%A CH Wang
%A Y Watanabe
%A E Won
%A BD Yabsley
%A A Yamaguchi
%A Y Yamashita
%A M Yamauchi
%A M Yoshida
%A Y Yusa
%A LM Zhang
%A ZP Zhang
%A V Zhilich
%A D Zurcher
%A Belle Collaborat
%T Evidence of the purely leptonic decay B- -> tau(-)(v)over-bar(tau)
%N 25
%L discovery1308528
%I AMERICAN PHYSICAL SOC