Evidence for B- -> tau(-)(nu)over-bar(tau) with a semileptonic tagging method

  • Hara, K.
  • Iijima, T.
  • Aihara, H.
  • Aulchenko, V.
  • Aushev, T.
  • ... Cheon, B. G.
  • 외 138명
Citations

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85
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초록

We present a measurement of the decay B- -> tau(-)(nu) over bar (tau) using a data sample containing 657 x 10(6) B (B) over bar pairs collected at the gamma(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. A sample of B+B- pairs are tagged by reconstructing one B+ meson decaying semileptonically. We detect the B- -> tau(-)(nu) over bar (tau) candidate in the recoil. We obtain a signal with a significance of 3.6 standard deviations including systematic uncertainties, and measure the branching fraction to be B- -> tau(-)(nu) over bar (tau) [1.54(-0.37)(+0.38) (stat) (+0.29)(-0.31) (syst) x 10(-4). This result confirms the evidence for B- -> tau(-)(nu) over bar (tau) obtained in a previous Belle measurement that used a hadronic B tagging method.

키워드

CP-VIOLATION
제목
Evidence for B- -> tau(-)(nu)over-bar(tau) with a semileptonic tagging method
저자
Hara, K.Iijima, T.Aihara, H.Aulchenko, V.Aushev, T.Aziz, T.Bakich, A. M.Barberio, E.Belous, K.Bischofberger, M.Bondar, A.Bozek, A.Bracko, M.Browder, T. E.Chang, P.Chao, Y.Chen, A.Cheon, B. G.Chiang, C-C.Cho, I-S.Choi, Y.Dalseno, J.Danilov, M.Dolezal, Z.Dungel, W.Eidelman, S.Gabyshev, N.Goldenzweig, P.Golob, B.Ha, H.Hasegawa, Y.Hayasaka, K.Hayashii, H.Horii, Y.Hoshi, Y.Hsiung, Y. B.Hyun, H. J.Inami, K.Iwabuchi, M.Iwasaki, Y.Julius, T.Kang, J. H.Kawai, H.Kawasaki, T.Kichimi, H.Kiesling, C.Kim, H. J.Kim, H. O.Kim, J. H.Kim, M. J.Kim, Y. J.Kinoshita, K.Ko, B. R.Kodys, P.Korpar, S.Kreps, M.Krizan, P.Krokovny, P.Kuhr, T.Kumita, T.Kuzmin, A.Kwon, Y-J.Kyeong, S-H.Lee, M. J.Lee, S-H.Li, J.Limosani, A.Liu, Y.Liventsev, D.Louvot, R.Matyja, A.McOnie, S.Miyabayashi, K.Miyata, H.Miyazaki, Y.Mohanty, G. B.Mori, T.Nakano, E.Nakao, M.Nakazawa, H.Neubauer, S.Nishida, S.Nishimura, K.Nitoh, O.Nozaki, T.Ogawa, S.Ohshima, T.Okuno, S.Olsen, S. L.Ozaki, H.Pakhlova, G.Park, C. W.Park, H. K.Pestotnik, R.Petric, M.Piilonen, L. E.Prim, M.Rozanska, M.Ryu, S.Sahoo, H.Sakai, Y.Schneider, O.Schuemann, J.Schwanda, C.Schwartz, A. J.Senyo, K.Sevior, M. E.Shapkin, M.Shibuya, H.Shiu, J-G.Shwartz, B.Singh, J. B.Smerkol, P.Solovieva, E.Stanic, S.Staric, M.Sumisawa, K.Sumiyoshi, T.Teramoto, Y.Tikhomirov, I.Trabelsi, K.Uehara, S.Uglov, T.Unno, Y.Uno, S.Ushiroda, Y.Varner, G.Varvell, K. E.Vervink, K.Wang, C. H.Wang, M-Z.Wang, P.Watanabe, Y.Wedd, R.Won, E.Yabsley, B. D.Yamashita, Y.Yamauchi, M.Yuan, C. Z.Zhang, C. C.Zhilich, V.Zivko, T.Zupanc, A.Zyukova, O.
DOI
10.1103/PhysRevD.82.071101
발행일
2010-10
유형
Article
저널명
Physical Review D - Particles, Fields, Gravitation and Cosmology
82
7
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