Evidence for B-→τ-ν̄τ with a semileptonic tagging method

K. Hara; T. Iijima; H. Aihara; V. Aulchenko; T. Aushev; T. Aziz; A. M. Bakich; E. Barberio; K. Belous; M. Bischofberger; A. Bondar; A. Bozek; M. Bračko; T. E. Browder; P. Chang; Y. Chao; A. Chen; B. G. Cheon; C. C. Chiang; I. S. Cho; Y. Choi; J. Dalseno; M. Danilov; Z. Doležal; W. Dungel; S. Eidelman; N. Gabyshev; P. Goldenzweig; B. Golob; H. Ha; Y. Hasegawa; K. Hayasaka; H. Hayashii; Y. Horii; Y. Hoshi; Y. B. Hsiung; H. J. Hyun; K. Inami; M. Iwabuchi; Y. Iwasaki; T. Julius; J. H. Kang; H. Kawai; T. Kawasaki; H. Kichimi; C. Kiesling; H. J. Kim; H. O. Kim; J. H. Kim; M. J. Kim; Y. J. Kim; K. Kinoshita; B. R. Ko; P. Kodyž; S. Korpar; M. Kreps; P. Križan; P. Krokovny; T. Kuhr; T. Kumita; A. Kuzmin; Y. J. Kwon; S. H. Kyeong; M. J. Lee; S. H. Lee; J. Li; A. Limosani; Y. Liu; D. Liventsev; R. Louvot; A. Matyja; S. McOnie; K. Miyabayashi; H. Miyata; Y. Miyazaki; G. B. Mohanty; T. Mori; E. Nakano; M. Nakao; H. Nakazawa; S. Neubauer; S. Nishida; K. Nishimura; O. Nitoh; T. Nozaki; S. Ogawa; T. Ohshima; S. Okuno; S. L. Olsen; H. Ozaki; G. Pakhlova; C. W. Park; H. K. Park; R. Pestotnik; M. Petrič; L. E. Piilonen; M. Prim; M. Rozanska; S. Ryu; H. Sahoo; Y. Sakai; O. Schneider; J. Schümann; C. Schwanda; A. J. Schwartz; K. Senyo; M. E. Sevior; M. Shapkin; H. Shibuya; J. G. Shiu; B. Shwartz; J. B. Singh; P. Smerkol; E. Solovieva; S. Stanič; M. Starič; K. Sumisawa; T. Sumiyoshi; Y. Teramoto; I. Tikhomirov; K. Trabelsi; S. Uehara; T. Uglov; Y. Unno; S. Uno; Y. Ushiroda; G. Varner; K. E. Varvell; K. Vervink; C. H. Wang; M. Z. Wang; P. Wang; Y. Watanabe; R. Wedd; E. Won; B. D. Yabsley; Y. Yamashita; M. Yamauchi; C. Z. Yuan; C. C. Zhang; V. Zhilich; T. Zivko; A. Zupanc; O. Zyukova

doi:10.1103/PhysRevD.82.071101

Evidence for B^-→τ^-ν̄τ with a semileptonic tagging method

K. Hara
, T. Iijima
, H. Aihara
, V. Aulchenko
, T. Aushev
, T. Aziz
, A. M. Bakich
, E. Barberio
, K. Belous
, M. Bischofberger
, A. Bondar
, A. Bozek
, M. Bračko
, T. E. Browder
, P. Chang
, Y. Chao
, A. Chen
, B. G. Cheon
, C. C. Chiang
, I. S. Cho

Y. Choi, J. Dalseno, M. Danilov, Z. Doležal, W. Dungel, S. Eidelman, N. Gabyshev, P. Goldenzweig, B. Golob, H. Ha, Y. Hasegawa, K. Hayasaka, H. Hayashii, Y. Horii, Y. Hoshi, Y. B. Hsiung, H. J. Hyun, K. Inami, M. Iwabuchi, Y. Iwasaki, T. Julius, J. H. Kang, H. Kawai, T. Kawasaki, H. Kichimi, C. Kiesling, H. J. Kim, H. O. Kim, J. H. Kim, M. J. Kim, Y. J. Kim, K. Kinoshita, B. R. Ko, P. Kodyž, S. Korpar, M. Kreps, P. Križan, P. Krokovny, T. Kuhr, T. Kumita, A. Kuzmin, Y. J. Kwon, S. H. Kyeong, M. J. Lee, S. H. Lee, J. Li, A. Limosani, Y. Liu, D. Liventsev, R. Louvot, A. Matyja, S. McOnie, K. Miyabayashi, H. Miyata, Y. Miyazaki, G. B. Mohanty, T. Mori, E. Nakano, M. Nakao, H. Nakazawa, S. Neubauer, S. Nishida, K. Nishimura, O. Nitoh, T. Nozaki, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, H. Ozaki, G. Pakhlova, C. W. Park, H. K. Park, R. Pestotnik, M. Petrič, L. E. Piilonen, M. Prim, M. Rozanska, S. Ryu, H. Sahoo, Y. Sakai, O. Schneider, J. Schümann, C. Schwanda, A. J. Schwartz, K. Senyo, M. E. Sevior, M. Shapkin, H. Shibuya, J. G. Shiu, B. Shwartz, J. B. Singh, P. Smerkol, E. Solovieva, S. Stanič, M. Starič, K. Sumisawa, T. Sumiyoshi, Y. Teramoto, I. Tikhomirov, K. Trabelsi, S. Uehara, T. Uglov, Y. Unno, S. Uno, Y. Ushiroda, G. Varner, K. E. Varvell, K. Vervink, C. H. Wang, M. Z. Wang, P. Wang, Y. Watanabe, R. Wedd, E. Won, B. D. Yabsley, Y. Yamashita, M. Yamauchi, C. Z. Yuan, C. C. Zhang, V. Zhilich, T. Zivko, A. Zupanc, O. Zyukova

Nagoya University
The University of Tokyo
RAS - Budker Institute of Nuclear Physics
Novosibirsk State University
Alikhanov Institute for Theoretical and Experimental Physics
Swiss Federal Institute of Technology Lausanne
Tata Institute of Fundamental Research
The University of Sydney
University of Melbourne
Institute for High Energy Physics
Nara Women's University
H. Niewodniczanski Institute of Nuclear Physics
Jožef Stefan Institute
University of Maribor
University of Hawai'i at Mānoa
National Taiwan University
National Central University
Hanyang University
Yonsei University
Sungkyunkwan University
Max Planck Institute for Physics (Werner Heisenberg Institute)
Technische Universität München
Charles University
Austrian Academy of Sciences
University of Cincinnati
University of Ljubljana
Korea University
Shinshu University
Tohoku University
Tohoku Gakuin University
Kyungpook National University
High Energy Accelerator Research Organization, Tsukuba
Chiba University
Niigata University
Korea Institute of Science and Technology Information
The Graduate University for Advanced Studies
Karlsruhe Institute of Technology
Tokyo Metropolitan University
Seoul National University
Osaka Metropolitan University
Tokyo University of Agriculture and Technology
Toho University
Kanagawa University
Virginia Polytechnic Institute and State University
Panjab University
University of Nova Gorica
National United University
CAS - Institute of High Energy Physics
Nippon Dental University

Research output: Contribution to journal › Article › peer-review

113 Scopus citations

Abstract

We present a measurement of the decay B^-→τ ^-ν̄τ using a data sample containing 657×106 BB̄ pairs collected at the Υ(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^-→τ ^-ν̄τ 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(B^-→τ ^-ν̄τ)=[1.54-0.37+0.38(stat)-0.31+0.29(syst)] ×10^-4. This result confirms the evidence for B ^-→τ^-ν̄τ obtained in a previous Belle measurement that used a hadronic B tagging method.

Original language	English
Article number	071101
Journal	Physical Review D - Particles, Fields, Gravitation and Cosmology
Volume	82
Issue number	7
DOIs	https://doi.org/10.1103/PhysRevD.82.071101
State	Published - 22 Oct 2010

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10.1103/PhysRevD.82.071101

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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., Bračko, M., Browder, T. E., Chang, P., Chao, Y., Chen, A., Cheon, B. G., Chiang, C. C., ... Zyukova, O. (2010). Evidence for B^-→τ^-ν̄τ with a semileptonic tagging method. Physical Review D - Particles, Fields, Gravitation and Cosmology, 82(7), Article 071101. https://doi.org/10.1103/PhysRevD.82.071101

@article{aec6c3881caf4adfb61d3edfad102bbc,

title = "Evidence for B-→τ-{\=ν}τ with a semileptonic tagging method",

abstract = "We present a measurement of the decay B-→τ -{\=ν}τ using a data sample containing 657×106 B{\=B} pairs collected at the Υ(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-→τ -{\=ν}τ 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(B-→τ -{\=ν}τ)=[1.54-0.37+0.38(stat)-0.31+0.29(syst)] ×10-4. This result confirms the evidence for B -→τ-{\=ν}τ obtained in a previous Belle measurement that used a hadronic B tagging method.",

author = "K. Hara and T. Iijima and H. Aihara and V. Aulchenko and T. Aushev and T. Aziz and Bakich, \{A. M.\} and E. Barberio and K. Belous and M. Bischofberger and A. Bondar and A. Bozek and M. Bra{\v c}ko and Browder, \{T. E.\} and P. Chang and Y. Chao and A. Chen and Cheon, \{B. G.\} and Chiang, \{C. C.\} and Cho, \{I. S.\} and Y. Choi and J. Dalseno and M. Danilov and Z. Dole{\v z}al and W. Dungel and S. Eidelman and N. Gabyshev and P. Goldenzweig and B. Golob and H. Ha and Y. Hasegawa and K. Hayasaka and H. Hayashii and Y. Horii and Y. Hoshi and Hsiung, \{Y. B.\} and Hyun, \{H. J.\} and K. Inami and M. Iwabuchi and Y. Iwasaki and T. Julius and Kang, \{J. H.\} and H. Kawai and T. Kawasaki and H. Kichimi and C. Kiesling and Kim, \{H. J.\} and Kim, \{H. O.\} and Kim, \{J. H.\} and Kim, \{M. J.\} and Kim, \{Y. J.\} and K. Kinoshita and Ko, \{B. R.\} and P. Kody{\v z} and S. Korpar and M. Kreps and P. Kri{\v z}an and P. Krokovny and T. Kuhr and T. Kumita and A. Kuzmin and Kwon, \{Y. J.\} and Kyeong, \{S. H.\} and Lee, \{M. J.\} and Lee, \{S. H.\} and J. Li and A. Limosani and Y. Liu and D. Liventsev and R. Louvot and A. Matyja and S. McOnie and K. Miyabayashi and H. Miyata and Y. Miyazaki and Mohanty, \{G. B.\} and T. Mori and E. Nakano and M. Nakao and H. Nakazawa and S. Neubauer and S. Nishida and K. Nishimura and O. Nitoh and T. Nozaki and S. Ogawa and T. Ohshima and S. Okuno and Olsen, \{S. L.\} and H. Ozaki and G. Pakhlova and Park, \{C. W.\} and Park, \{H. K.\} and R. Pestotnik and M. Petri{\v c} and Piilonen, \{L. E.\} and M. Prim and M. Rozanska and S. Ryu and H. Sahoo and Y. Sakai and O. Schneider and J. Sch{\"u}mann and C. Schwanda and Schwartz, \{A. J.\} and K. Senyo and Sevior, \{M. E.\} and M. Shapkin and H. Shibuya and Shiu, \{J. G.\} and B. Shwartz and Singh, \{J. B.\} and P. Smerkol and E. Solovieva and S. Stani{\v c} and M. Stari{\v c} and K. Sumisawa and T. Sumiyoshi and Y. Teramoto and I. Tikhomirov and K. Trabelsi and S. Uehara and T. Uglov and Y. Unno and S. Uno and Y. Ushiroda and G. Varner and Varvell, \{K. E.\} and K. Vervink and Wang, \{C. H.\} and Wang, \{M. Z.\} and P. Wang and Y. Watanabe and R. Wedd and E. Won and Yabsley, \{B. D.\} and Y. Yamashita and M. Yamauchi and Yuan, \{C. Z.\} and Zhang, \{C. C.\} and V. Zhilich and T. Zivko and A. Zupanc and O. Zyukova",

year = "2010",

month = oct,

day = "22",

doi = "10.1103/PhysRevD.82.071101",

language = "English",

volume = "82",

journal = "Physical Review D - Particles, Fields, Gravitation and Cosmology",

issn = "1550-7998",

publisher = "American Physical Society",

number = "7",

}

Hara, K, Iijima, T, Aihara, H, Aulchenko, V, Aushev, T, Aziz, T, Bakich, AM, Barberio, E, Belous, K, Bischofberger, M, Bondar, A, Bozek, A, Bračko, M, Browder, TE, Chang, P, Chao, Y, Chen, A, Cheon, BG, Chiang, CC, Cho, IS, Choi, Y, Dalseno, J, Danilov, M, Doležal, Z, Dungel, W, Eidelman, S, Gabyshev, N, Goldenzweig, P, Golob, B, Ha, H, Hasegawa, Y, Hayasaka, K, Hayashii, H, Horii, Y, Hoshi, Y, Hsiung, YB, Hyun, HJ, Inami, K, Iwabuchi, M, Iwasaki, Y, Julius, T, Kang, JH, Kawai, H, Kawasaki, T, Kichimi, H, Kiesling, C, Kim, HJ, Kim, HO, Kim, JH, Kim, MJ, Kim, YJ, Kinoshita, K, Ko, BR, Kodyž, P, Korpar, S, Kreps, M, Križan, P, Krokovny, P, Kuhr, T, Kumita, T, Kuzmin, A, Kwon, YJ, Kyeong, SH, Lee, MJ, Lee, SH, Li, J, Limosani, A, Liu, Y, Liventsev, D, Louvot, R, Matyja, A, McOnie, S, Miyabayashi, K, Miyata, H, Miyazaki, Y, Mohanty, GB, 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, SL, Ozaki, H, Pakhlova, G, Park, CW, Park, HK, Pestotnik, R, Petrič, M, Piilonen, LE, Prim, M, Rozanska, M, Ryu, S, Sahoo, H, Sakai, Y, Schneider, O, Schümann, J, Schwanda, C, Schwartz, AJ, Senyo, K, Sevior, ME, Shapkin, M, Shibuya, H, Shiu, JG, Shwartz, B, Singh, JB, Smerkol, P, Solovieva, E, Stanič, S, Starič, M, Sumisawa, K, Sumiyoshi, T, Teramoto, Y, Tikhomirov, I, Trabelsi, K, Uehara, S, Uglov, T, Unno, Y, Uno, S, Ushiroda, Y, Varner, G, Varvell, KE, Vervink, K, Wang, CH, Wang, MZ, Wang, P, Watanabe, Y, Wedd, R, Won, E, Yabsley, BD, Yamashita, Y, Yamauchi, M, Yuan, CZ, Zhang, CC, Zhilich, V, Zivko, T, Zupanc, A & Zyukova, O 2010, 'Evidence for B^-→τ^-ν̄τ with a semileptonic tagging method', Physical Review D - Particles, Fields, Gravitation and Cosmology, vol. 82, no. 7, 071101. https://doi.org/10.1103/PhysRevD.82.071101

TY - JOUR

T1 - Evidence for B-→τ-ν̄τ with a semileptonic tagging method

AU - Hara, K.

AU - Iijima, T.

AU - Aihara, H.

AU - Aulchenko, V.

AU - Aushev, T.

AU - Aziz, T.

AU - Bakich, A. M.

AU - Barberio, E.

AU - Belous, K.

AU - Bischofberger, M.

AU - Bondar, A.

AU - Bozek, A.

AU - Bračko, M.

AU - Browder, T. E.

AU - Chang, P.

AU - Chao, Y.

AU - Chen, A.

AU - Cheon, B. G.

AU - Chiang, C. C.

AU - Cho, I. S.

AU - Choi, Y.

AU - Dalseno, J.

AU - Danilov, M.

AU - Doležal, Z.

AU - Dungel, W.

AU - Eidelman, S.

AU - Gabyshev, N.

AU - Goldenzweig, P.

AU - Golob, B.

AU - Ha, H.

AU - Hasegawa, Y.

AU - Hayasaka, K.

AU - Hayashii, H.

AU - Horii, Y.

AU - Hoshi, Y.

AU - Hsiung, Y. B.

AU - Hyun, H. J.

AU - Inami, K.

AU - Iwabuchi, M.

AU - Iwasaki, Y.

AU - Julius, T.

AU - Kang, J. H.

AU - Kawai, H.

AU - Kawasaki, T.

AU - Kichimi, H.

AU - Kiesling, C.

AU - Kim, H. J.

AU - Kim, H. O.

AU - Kim, J. H.

AU - Kim, M. J.

AU - Kim, Y. J.

AU - Kinoshita, K.

AU - Ko, B. R.

AU - Kodyž, P.

AU - Korpar, S.

AU - Kreps, M.

AU - Križan, P.

AU - Krokovny, P.

AU - Kuhr, T.

AU - Kumita, T.

AU - Kuzmin, A.

AU - Kwon, Y. J.

AU - Kyeong, S. H.

AU - Lee, M. J.

AU - Lee, S. H.

AU - Li, J.

AU - Limosani, A.

AU - Liu, Y.

AU - Liventsev, D.

AU - Louvot, R.

AU - Matyja, A.

AU - McOnie, S.

AU - Miyabayashi, K.

AU - Miyata, H.

AU - Miyazaki, Y.

AU - Mohanty, G. B.

AU - Mori, T.

AU - Nakano, E.

AU - Nakao, M.

AU - Nakazawa, H.

AU - Neubauer, S.

AU - Nishida, S.

AU - Nishimura, K.

AU - Nitoh, O.

AU - Nozaki, T.

AU - Ogawa, S.

AU - Ohshima, T.

AU - Okuno, S.

AU - Olsen, S. L.

AU - Ozaki, H.

AU - Pakhlova, G.

AU - Park, C. W.

AU - Park, H. K.

AU - Pestotnik, R.

AU - Petrič, M.

AU - Piilonen, L. E.

AU - Prim, M.

AU - Rozanska, M.

AU - Ryu, S.

AU - Sahoo, H.

AU - Sakai, Y.

AU - Schneider, O.

AU - Schümann, J.

AU - Schwanda, C.

AU - Schwartz, A. J.

AU - Senyo, K.

AU - Sevior, M. E.

AU - Shapkin, M.

AU - Shibuya, H.

AU - Shiu, J. G.

AU - Shwartz, B.

AU - Singh, J. B.

AU - Smerkol, P.

AU - Solovieva, E.

AU - Stanič, S.

AU - Starič, M.

AU - Sumisawa, K.

AU - Sumiyoshi, T.

AU - Teramoto, Y.

AU - Tikhomirov, I.

AU - Trabelsi, K.

AU - Uehara, S.

AU - Uglov, T.

AU - Unno, Y.

AU - Uno, S.

AU - Ushiroda, Y.

AU - Varner, G.

AU - Varvell, K. E.

AU - Vervink, K.

AU - Wang, C. H.

AU - Wang, M. Z.

AU - Wang, P.

AU - Watanabe, Y.

AU - Wedd, R.

AU - Won, E.

AU - Yabsley, B. D.

AU - Yamashita, Y.

AU - Yamauchi, M.

AU - Yuan, C. Z.

AU - Zhang, C. C.

AU - Zhilich, V.

AU - Zivko, T.

AU - Zupanc, A.

AU - Zyukova, O.

PY - 2010/10/22

Y1 - 2010/10/22

N2 - We present a measurement of the decay B-→τ -ν̄τ using a data sample containing 657×106 BB̄ pairs collected at the Υ(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-→τ -ν̄τ 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(B-→τ -ν̄τ)=[1.54-0.37+0.38(stat)-0.31+0.29(syst)] ×10-4. This result confirms the evidence for B -→τ-ν̄τ obtained in a previous Belle measurement that used a hadronic B tagging method.

AB - We present a measurement of the decay B-→τ -ν̄τ using a data sample containing 657×106 BB̄ pairs collected at the Υ(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-→τ -ν̄τ 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(B-→τ -ν̄τ)=[1.54-0.37+0.38(stat)-0.31+0.29(syst)] ×10-4. This result confirms the evidence for B -→τ-ν̄τ obtained in a previous Belle measurement that used a hadronic B tagging method.

UR - https://www.scopus.com/pages/publications/78650973111

U2 - 10.1103/PhysRevD.82.071101

DO - 10.1103/PhysRevD.82.071101

M3 - Article

AN - SCOPUS:78650973111

SN - 1550-7998

VL - 82

JO - Physical Review D - Particles, Fields, Gravitation and Cosmology

JF - Physical Review D - Particles, Fields, Gravitation and Cosmology

IS - 7

M1 - 071101

ER -

Evidence for B^-→τ^-ν̄τ with a semileptonic tagging method

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