Evidence of the purely leptonic decay B-→τ-ν̄τ

K. Ikado, K. Abe, K. Abe, I. Adachi, H. Aihara, K. Akai, M. Akemoto, D. Anipko, K. Arinstein, V. Aulchenko, T. Aushev, T. Aziz, A. M. Bakich, V. Balagura, M. Barbero, A. Bay, I. Bedny, K. Belous, U. Bitenc, I. Bizjak & 164 others A. Bondar, A. Bozek, M. Bračko, T. E. Browder, P. Chang, A. Chen, W. T. Chen, Y. Choi, S. Cole, J. Dalseno, M. Danilov, M. Dash, S. Eidelman, D. Epifanov, J. Flanagan, S. Fratina, K. Furukawa, N. Gabyshev, T. Gershon, A. Go, G. Gokhroo, B. Golob, A. Gorišek, H. Ha, J. Haba, K. Hara, T. Hara, N. C. Hastings, K. Hayasaka, H. Hayashii, M. Hazumi, L. Hinz, T. Hokuue, Y. Hoshi, S. Hou, W. S. Hou, N. Iida, T. Iijima, A. Imoto, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, M. Iwasaki, Y. Iwasaki, T. Kamitani, Ju Hwan Kang, S. U. Kataoka, N. Katayama, H. Kawai, T. Kawasaki, H. Kichimi, E. Kikutani, H. J. Kim, H. O. Kim, K. Kinoshita, H. Koiso, S. Korpar, P. Križan, P. Krokovny, R. Kulasiri, R. Kumar, C. C. Kuo, A. Kuzmin, Youngjoon Kwon, J. S. Lange, G. Leder, J. Lee, T. Lesiak, A. Limosani, S. W. Lin, D. Liventsev, D. Marlow, T. Matsumoto, A. Matyja, S. McOnie, S. Michizono, T. Mimashi, W. Mitaroff, K. Miyabayashi, H. Miyata, Y. Miyazaki, R. Mizuk, T. Nagamine, I. Nakamura, T. T. Nakamura, E. Nakano, M. Nakao, S. Nishida, O. Nitoh, S. Noguchi, T. Nozaki, S. Ogawa, Y. Ogawa, K. Ohmi, T. Ohshima, N. Ohuchi, K. Oide, T. Okabe, S. Okuno, S. L. Olsen, Y. Onuki, W. Ostrowicz, H. Ozaki, P. Pakhlov, C. W. Park, H. Park, R. Pestotnik, L. E. Piilonen, A. Poluektov, M. Rozanska, Y. Sakai, T. Schietinger, O. Schneider, C. Schwanda, K. Senyo, M. E. Sevior, M. Shapkin, H. Shibuya, T. Shidara, B. Shwartz, V. Sidorov, A. Sokolov, A. Somov, S. Stanič, M. Starič, H. Stoeck, K. Sumisawa, T. Sumiyoshi, S. Suzuki, O. Tajima, F. Takasaki, K. Tamai, N. Tamura, M. Tanaka, M. Tawada, G. N. Taylor, Y. Teramoto, X. C. Tian, K. Trabelsi, T. Tsuboyama, T. Tsukamoto, S. Uehara, T. Uglov, K. Ueno, Y. Unno, S. Uno, Y. Usov, G. Varner, S. Villa, C. C. Wang, C. H. Wang, Y. Watanabe, E. Won, B. D. Yabsley, A. Yamaguchi, Y. Yamashita, M. Yamauchi, M. Yoshida, Y. Yusa, L. M. Zhang, Z. P. Zhang, V. Zhilich, D. Zürcher

Research output: Contribution to journalArticle

249 Citations (Scopus)

Abstract

We present the first evidence of the decay B-→τ-ν̄τ, using 414fb-1 of data collected at the Υ(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-→τ-ν̄τ)=(1.79-0.49+0.56(stat) -0.51+0.46(syst))×10-4. This implies that fB=0.229-0.031+0.036(stat)-0. 037+0.034(syst)GeV and is the first direct measurement of this quantity.

Original languageEnglish
Article number251802
JournalPhysical Review Letters
Volume97
Issue number25
DOIs
Publication statusPublished - 2006 Dec 1

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standard deviation
mesons
detectors
decay
energy

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Ikado, K., Abe, K., Abe, K., Adachi, I., Aihara, H., Akai, K., ... Zürcher, D. (2006). Evidence of the purely leptonic decay B-→τ-ν̄τ. Physical Review Letters, 97(25), [251802]. https://doi.org/10.1103/PhysRevLett.97.251802
Ikado, K. ; Abe, K. ; Abe, K. ; Adachi, I. ; Aihara, H. ; Akai, K. ; Akemoto, M. ; Anipko, D. ; Arinstein, K. ; Aulchenko, V. ; Aushev, T. ; Aziz, T. ; Bakich, A. M. ; Balagura, V. ; Barbero, M. ; Bay, A. ; Bedny, I. ; Belous, K. ; Bitenc, U. ; Bizjak, I. ; Bondar, A. ; Bozek, A. ; Bračko, M. ; Browder, T. E. ; Chang, P. ; Chen, A. ; Chen, W. T. ; Choi, Y. ; Cole, S. ; Dalseno, J. ; Danilov, M. ; Dash, M. ; Eidelman, S. ; Epifanov, D. ; Flanagan, J. ; Fratina, S. ; Furukawa, K. ; Gabyshev, N. ; Gershon, T. ; Go, A. ; Gokhroo, G. ; Golob, B. ; Gorišek, A. ; Ha, H. ; Haba, J. ; Hara, K. ; Hara, T. ; Hastings, N. C. ; Hayasaka, K. ; Hayashii, H. ; Hazumi, M. ; Hinz, L. ; Hokuue, T. ; Hoshi, Y. ; Hou, S. ; Hou, W. S. ; Iida, N. ; Iijima, T. ; Imoto, A. ; Inami, K. ; Ishikawa, A. ; Ishino, H. ; Itoh, R. ; Iwasaki, M. ; Iwasaki, Y. ; Kamitani, T. ; Kang, Ju Hwan ; Kataoka, S. U. ; Katayama, N. ; Kawai, H. ; Kawasaki, T. ; Kichimi, H. ; Kikutani, E. ; Kim, H. J. ; Kim, H. O. ; Kinoshita, K. ; Koiso, H. ; Korpar, S. ; Križan, P. ; Krokovny, P. ; Kulasiri, R. ; Kumar, R. ; Kuo, C. C. ; Kuzmin, A. ; Kwon, Youngjoon ; Lange, J. S. ; Leder, G. ; Lee, J. ; Lesiak, T. ; Limosani, A. ; Lin, S. W. ; Liventsev, D. ; Marlow, D. ; Matsumoto, T. ; Matyja, A. ; McOnie, S. ; Michizono, S. ; Mimashi, T. ; Mitaroff, W. ; Miyabayashi, K. ; Miyata, H. ; Miyazaki, Y. ; Mizuk, R. ; Nagamine, T. ; Nakamura, I. ; Nakamura, T. T. ; Nakano, E. ; Nakao, M. ; Nishida, S. ; Nitoh, O. ; Noguchi, S. ; Nozaki, T. ; Ogawa, S. ; Ogawa, Y. ; Ohmi, K. ; Ohshima, T. ; Ohuchi, N. ; Oide, K. ; Okabe, T. ; Okuno, S. ; Olsen, S. L. ; Onuki, Y. ; Ostrowicz, W. ; Ozaki, H. ; Pakhlov, P. ; Park, C. W. ; Park, H. ; Pestotnik, R. ; Piilonen, L. E. ; Poluektov, A. ; Rozanska, M. ; Sakai, Y. ; Schietinger, T. ; Schneider, O. ; Schwanda, C. ; Senyo, K. ; Sevior, M. E. ; Shapkin, M. ; Shibuya, H. ; Shidara, T. ; Shwartz, B. ; Sidorov, V. ; Sokolov, A. ; Somov, A. ; Stanič, S. ; Starič, M. ; Stoeck, H. ; Sumisawa, K. ; Sumiyoshi, T. ; Suzuki, S. ; Tajima, O. ; Takasaki, F. ; Tamai, K. ; Tamura, N. ; Tanaka, M. ; Tawada, M. ; Taylor, G. N. ; Teramoto, Y. ; Tian, X. C. ; Trabelsi, K. ; Tsuboyama, T. ; Tsukamoto, T. ; Uehara, S. ; Uglov, T. ; Ueno, K. ; Unno, Y. ; Uno, S. ; Usov, Y. ; Varner, G. ; Villa, S. ; Wang, C. C. ; Wang, C. H. ; Watanabe, Y. ; Won, E. ; Yabsley, B. D. ; Yamaguchi, A. ; Yamashita, Y. ; Yamauchi, M. ; Yoshida, M. ; Yusa, Y. ; Zhang, L. M. ; Zhang, Z. P. ; Zhilich, V. ; Zürcher, D. / Evidence of the purely leptonic decay B-→τ-ν̄τ. In: Physical Review Letters. 2006 ; Vol. 97, No. 25.
@article{faa28d7d02f24bdd8227d8907dc17dcf,
title = "Evidence of the purely leptonic decay B-→τ-ν̄τ",
abstract = "We present the first evidence of the decay B-→τ-ν̄τ, using 414fb-1 of data collected at the Υ(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-→τ-ν̄τ)=(1.79-0.49+0.56(stat) -0.51+0.46(syst))×10-4. This implies that fB=0.229-0.031+0.036(stat)-0. 037+0.034(syst)GeV and is the first direct measurement of this quantity.",
author = "K. Ikado and K. Abe and K. Abe and I. Adachi and H. Aihara and K. Akai and M. Akemoto and D. Anipko and K. Arinstein and V. Aulchenko and T. Aushev and T. Aziz and Bakich, {A. M.} and V. Balagura and M. Barbero and A. Bay and I. Bedny and K. Belous and U. Bitenc and I. Bizjak and A. Bondar and A. Bozek and M. Bračko and Browder, {T. E.} and P. Chang and A. Chen and Chen, {W. T.} and Y. Choi and S. Cole and J. Dalseno and M. Danilov and M. Dash and S. Eidelman and D. Epifanov and J. Flanagan and S. Fratina and K. Furukawa and N. Gabyshev and T. Gershon and A. Go and G. Gokhroo and B. Golob and A. Gorišek and H. Ha and J. Haba and K. Hara and T. Hara and Hastings, {N. C.} and K. Hayasaka and H. Hayashii and M. Hazumi and L. Hinz and T. Hokuue and Y. Hoshi and S. Hou and Hou, {W. S.} and N. Iida and T. Iijima and A. Imoto and K. Inami and A. Ishikawa and H. Ishino and R. Itoh and M. Iwasaki and Y. Iwasaki and T. Kamitani and Kang, {Ju Hwan} and Kataoka, {S. U.} and N. Katayama and H. Kawai and T. Kawasaki and H. Kichimi and E. Kikutani and Kim, {H. J.} and Kim, {H. O.} and K. Kinoshita and H. Koiso and S. Korpar and P. Križan and P. Krokovny and R. Kulasiri and R. Kumar and Kuo, {C. C.} and A. Kuzmin and Youngjoon Kwon and Lange, {J. S.} and G. Leder and J. Lee and T. Lesiak and A. Limosani and Lin, {S. W.} and D. Liventsev and D. Marlow and T. Matsumoto and A. Matyja and S. McOnie and S. Michizono and T. Mimashi and W. Mitaroff and K. Miyabayashi and H. Miyata and Y. Miyazaki and R. Mizuk and T. Nagamine and I. Nakamura and Nakamura, {T. T.} and E. Nakano and M. Nakao and S. Nishida and O. Nitoh and S. Noguchi and T. Nozaki and S. Ogawa and Y. Ogawa and K. Ohmi and T. Ohshima and N. Ohuchi and K. Oide and T. Okabe and S. Okuno and Olsen, {S. L.} and Y. Onuki and W. Ostrowicz and H. Ozaki and P. Pakhlov and Park, {C. W.} and H. Park and R. Pestotnik and Piilonen, {L. E.} and A. Poluektov and M. Rozanska and Y. Sakai and T. Schietinger and O. Schneider and C. Schwanda and K. Senyo and Sevior, {M. E.} and M. Shapkin and H. Shibuya and T. Shidara and B. Shwartz and V. Sidorov and A. Sokolov and A. Somov and S. Stanič and M. Starič and H. Stoeck and K. Sumisawa and T. Sumiyoshi and S. Suzuki and O. Tajima and F. Takasaki and K. Tamai and N. Tamura and M. Tanaka and M. Tawada and Taylor, {G. N.} and Y. Teramoto and Tian, {X. C.} and K. Trabelsi and T. Tsuboyama and T. Tsukamoto and S. Uehara and T. Uglov and K. Ueno and Y. Unno and S. Uno and Y. Usov and G. Varner and S. Villa and Wang, {C. C.} and Wang, {C. H.} and Y. Watanabe and E. Won and Yabsley, {B. D.} and A. Yamaguchi and Y. Yamashita and M. Yamauchi and M. Yoshida and Y. Yusa and Zhang, {L. M.} and Zhang, {Z. P.} and V. Zhilich and D. Z{\"u}rcher",
year = "2006",
month = "12",
day = "1",
doi = "10.1103/PhysRevLett.97.251802",
language = "English",
volume = "97",
journal = "Physical Review Letters",
issn = "0031-9007",
publisher = "American Physical Society",
number = "25",

}

Ikado, K, Abe, K, Abe, K, Adachi, I, Aihara, H, Akai, K, Akemoto, M, Anipko, D, Arinstein, K, Aulchenko, V, Aushev, T, Aziz, T, Bakich, AM, Balagura, V, Barbero, M, Bay, A, Bedny, I, Belous, K, Bitenc, U, Bizjak, I, Bondar, A, Bozek, A, Bračko, M, Browder, TE, Chang, P, Chen, A, Chen, WT, Choi, Y, Cole, S, Dalseno, J, Danilov, M, Dash, M, Eidelman, S, Epifanov, D, Flanagan, J, Fratina, S, Furukawa, K, Gabyshev, N, Gershon, T, Go, A, Gokhroo, G, Golob, B, Gorišek, A, Ha, H, Haba, J, Hara, K, Hara, T, Hastings, NC, Hayasaka, K, Hayashii, H, Hazumi, M, Hinz, L, Hokuue, T, Hoshi, Y, Hou, S, Hou, WS, Iida, N, Iijima, T, Imoto, A, Inami, K, Ishikawa, A, Ishino, H, Itoh, R, Iwasaki, M, Iwasaki, Y, Kamitani, T, Kang, JH, Kataoka, SU, Katayama, N, Kawai, H, Kawasaki, T, Kichimi, H, Kikutani, E, Kim, HJ, Kim, HO, Kinoshita, K, Koiso, H, Korpar, S, Križan, P, Krokovny, P, Kulasiri, R, Kumar, R, Kuo, CC, Kuzmin, A, Kwon, Y, Lange, JS, Leder, G, Lee, J, Lesiak, T, Limosani, A, Lin, SW, Liventsev, D, Marlow, D, Matsumoto, T, Matyja, A, McOnie, S, Michizono, S, Mimashi, T, Mitaroff, W, Miyabayashi, K, Miyata, H, Miyazaki, Y, Mizuk, R, Nagamine, T, Nakamura, I, Nakamura, TT, Nakano, E, Nakao, M, Nishida, S, Nitoh, O, Noguchi, S, Nozaki, T, Ogawa, S, Ogawa, Y, Ohmi, K, Ohshima, T, Ohuchi, N, Oide, K, Okabe, T, Okuno, S, Olsen, SL, Onuki, Y, Ostrowicz, W, Ozaki, H, Pakhlov, P, Park, CW, Park, H, Pestotnik, R, Piilonen, LE, Poluektov, A, Rozanska, M, Sakai, Y, Schietinger, T, Schneider, O, Schwanda, C, Senyo, K, Sevior, ME, Shapkin, M, Shibuya, H, Shidara, T, Shwartz, B, Sidorov, V, Sokolov, A, Somov, A, Stanič, S, Starič, M, Stoeck, H, Sumisawa, K, Sumiyoshi, T, Suzuki, S, Tajima, O, Takasaki, F, Tamai, K, Tamura, N, Tanaka, M, Tawada, M, Taylor, GN, Teramoto, Y, Tian, XC, Trabelsi, K, Tsuboyama, T, Tsukamoto, T, Uehara, S, Uglov, T, Ueno, K, Unno, Y, Uno, S, Usov, Y, Varner, G, Villa, S, Wang, CC, Wang, CH, Watanabe, Y, Won, E, Yabsley, BD, Yamaguchi, A, Yamashita, Y, Yamauchi, M, Yoshida, M, Yusa, Y, Zhang, LM, Zhang, ZP, Zhilich, V & Zürcher, D 2006, 'Evidence of the purely leptonic decay B-→τ-ν̄τ', Physical Review Letters, vol. 97, no. 25, 251802. https://doi.org/10.1103/PhysRevLett.97.251802

Evidence of the purely leptonic decay B-→τ-ν̄τ. / Ikado, K.; Abe, K.; Abe, K.; Adachi, I.; Aihara, H.; Akai, K.; Akemoto, M.; Anipko, D.; Arinstein, K.; Aulchenko, V.; Aushev, T.; Aziz, T.; Bakich, A. M.; Balagura, V.; Barbero, M.; Bay, A.; Bedny, I.; Belous, K.; Bitenc, U.; Bizjak, I.; Bondar, A.; Bozek, A.; Bračko, M.; Browder, T. E.; Chang, P.; Chen, A.; Chen, W. T.; Choi, Y.; Cole, S.; Dalseno, J.; Danilov, M.; Dash, M.; Eidelman, S.; Epifanov, D.; Flanagan, J.; Fratina, S.; Furukawa, K.; Gabyshev, N.; Gershon, T.; Go, A.; Gokhroo, G.; Golob, B.; Gorišek, A.; Ha, H.; Haba, J.; Hara, K.; Hara, T.; Hastings, N. C.; Hayasaka, K.; Hayashii, H.; Hazumi, M.; Hinz, L.; Hokuue, T.; Hoshi, Y.; Hou, S.; Hou, W. S.; Iida, N.; Iijima, T.; Imoto, A.; Inami, K.; Ishikawa, A.; Ishino, H.; Itoh, R.; Iwasaki, M.; Iwasaki, Y.; Kamitani, T.; Kang, Ju Hwan; Kataoka, S. U.; Katayama, N.; Kawai, H.; Kawasaki, T.; Kichimi, H.; Kikutani, E.; Kim, H. J.; Kim, H. O.; Kinoshita, K.; Koiso, H.; Korpar, S.; Križan, P.; Krokovny, P.; Kulasiri, R.; Kumar, R.; Kuo, C. C.; Kuzmin, A.; Kwon, Youngjoon; Lange, J. S.; Leder, G.; Lee, J.; Lesiak, T.; Limosani, A.; Lin, S. W.; Liventsev, D.; Marlow, D.; Matsumoto, T.; Matyja, A.; McOnie, S.; Michizono, S.; Mimashi, T.; Mitaroff, W.; Miyabayashi, K.; Miyata, H.; Miyazaki, Y.; Mizuk, R.; Nagamine, T.; Nakamura, I.; Nakamura, T. T.; Nakano, E.; Nakao, M.; Nishida, S.; Nitoh, O.; Noguchi, S.; Nozaki, T.; Ogawa, S.; Ogawa, Y.; Ohmi, K.; Ohshima, T.; Ohuchi, N.; Oide, K.; Okabe, T.; Okuno, S.; Olsen, S. L.; Onuki, Y.; Ostrowicz, W.; Ozaki, H.; Pakhlov, P.; Park, C. W.; Park, H.; Pestotnik, R.; Piilonen, L. E.; Poluektov, A.; Rozanska, M.; Sakai, Y.; Schietinger, T.; Schneider, O.; Schwanda, C.; Senyo, K.; Sevior, M. E.; Shapkin, M.; Shibuya, H.; Shidara, T.; Shwartz, B.; Sidorov, V.; Sokolov, A.; Somov, A.; Stanič, S.; Starič, M.; Stoeck, H.; Sumisawa, K.; Sumiyoshi, T.; Suzuki, S.; Tajima, O.; Takasaki, F.; Tamai, K.; Tamura, N.; Tanaka, M.; Tawada, M.; Taylor, G. N.; Teramoto, Y.; Tian, X. C.; Trabelsi, K.; Tsuboyama, T.; Tsukamoto, T.; Uehara, S.; Uglov, T.; Ueno, K.; Unno, Y.; Uno, S.; Usov, Y.; Varner, G.; Villa, S.; Wang, C. C.; Wang, C. H.; Watanabe, Y.; Won, E.; Yabsley, B. D.; Yamaguchi, A.; Yamashita, Y.; Yamauchi, M.; Yoshida, M.; Yusa, Y.; Zhang, L. M.; Zhang, Z. P.; Zhilich, V.; Zürcher, D.

In: Physical Review Letters, Vol. 97, No. 25, 251802, 01.12.2006.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Evidence of the purely leptonic decay B-→τ-ν̄τ

AU - Ikado, K.

AU - Abe, K.

AU - Abe, K.

AU - Adachi, I.

AU - Aihara, H.

AU - Akai, K.

AU - Akemoto, M.

AU - Anipko, D.

AU - Arinstein, K.

AU - Aulchenko, V.

AU - Aushev, T.

AU - Aziz, T.

AU - Bakich, A. M.

AU - Balagura, V.

AU - Barbero, M.

AU - Bay, A.

AU - Bedny, I.

AU - Belous, K.

AU - Bitenc, U.

AU - Bizjak, I.

AU - Bondar, A.

AU - Bozek, A.

AU - Bračko, M.

AU - Browder, T. E.

AU - Chang, P.

AU - Chen, A.

AU - Chen, W. T.

AU - Choi, Y.

AU - Cole, S.

AU - Dalseno, J.

AU - Danilov, M.

AU - Dash, M.

AU - Eidelman, S.

AU - Epifanov, D.

AU - Flanagan, J.

AU - Fratina, S.

AU - Furukawa, K.

AU - Gabyshev, N.

AU - Gershon, T.

AU - Go, A.

AU - Gokhroo, G.

AU - Golob, B.

AU - Gorišek, A.

AU - Ha, H.

AU - Haba, J.

AU - Hara, K.

AU - Hara, T.

AU - Hastings, N. C.

AU - Hayasaka, K.

AU - Hayashii, H.

AU - Hazumi, M.

AU - Hinz, L.

AU - Hokuue, T.

AU - Hoshi, Y.

AU - Hou, S.

AU - Hou, W. S.

AU - Iida, N.

AU - Iijima, T.

AU - Imoto, A.

AU - Inami, K.

AU - Ishikawa, A.

AU - Ishino, H.

AU - Itoh, R.

AU - Iwasaki, M.

AU - Iwasaki, Y.

AU - Kamitani, T.

AU - Kang, Ju Hwan

AU - Kataoka, S. U.

AU - Katayama, N.

AU - Kawai, H.

AU - Kawasaki, T.

AU - Kichimi, H.

AU - Kikutani, E.

AU - Kim, H. J.

AU - Kim, H. O.

AU - Kinoshita, K.

AU - Koiso, H.

AU - Korpar, S.

AU - Križan, P.

AU - Krokovny, P.

AU - Kulasiri, R.

AU - Kumar, R.

AU - Kuo, C. C.

AU - Kuzmin, A.

AU - Kwon, Youngjoon

AU - Lange, J. S.

AU - Leder, G.

AU - Lee, J.

AU - Lesiak, T.

AU - Limosani, A.

AU - Lin, S. W.

AU - Liventsev, D.

AU - Marlow, D.

AU - Matsumoto, T.

AU - Matyja, A.

AU - McOnie, S.

AU - Michizono, S.

AU - Mimashi, T.

AU - Mitaroff, W.

AU - Miyabayashi, K.

AU - Miyata, H.

AU - Miyazaki, Y.

AU - Mizuk, R.

AU - Nagamine, T.

AU - Nakamura, I.

AU - Nakamura, T. T.

AU - Nakano, E.

AU - Nakao, M.

AU - Nishida, S.

AU - Nitoh, O.

AU - Noguchi, S.

AU - Nozaki, T.

AU - Ogawa, S.

AU - Ogawa, Y.

AU - Ohmi, K.

AU - Ohshima, T.

AU - Ohuchi, N.

AU - Oide, K.

AU - Okabe, T.

AU - Okuno, S.

AU - Olsen, S. L.

AU - Onuki, Y.

AU - Ostrowicz, W.

AU - Ozaki, H.

AU - Pakhlov, P.

AU - Park, C. W.

AU - Park, H.

AU - Pestotnik, R.

AU - Piilonen, L. E.

AU - Poluektov, A.

AU - Rozanska, M.

AU - Sakai, Y.

AU - Schietinger, T.

AU - Schneider, O.

AU - Schwanda, C.

AU - Senyo, K.

AU - Sevior, M. E.

AU - Shapkin, M.

AU - Shibuya, H.

AU - Shidara, T.

AU - Shwartz, B.

AU - Sidorov, V.

AU - Sokolov, A.

AU - Somov, A.

AU - Stanič, S.

AU - Starič, M.

AU - Stoeck, H.

AU - Sumisawa, K.

AU - Sumiyoshi, T.

AU - Suzuki, S.

AU - Tajima, O.

AU - Takasaki, F.

AU - Tamai, K.

AU - Tamura, N.

AU - Tanaka, M.

AU - Tawada, M.

AU - Taylor, G. N.

AU - Teramoto, Y.

AU - Tian, X. C.

AU - Trabelsi, K.

AU - Tsuboyama, T.

AU - Tsukamoto, T.

AU - Uehara, S.

AU - Uglov, T.

AU - Ueno, K.

AU - Unno, Y.

AU - Uno, S.

AU - Usov, Y.

AU - Varner, G.

AU - Villa, S.

AU - Wang, C. C.

AU - Wang, C. H.

AU - Watanabe, Y.

AU - Won, E.

AU - Yabsley, B. D.

AU - Yamaguchi, A.

AU - Yamashita, Y.

AU - Yamauchi, M.

AU - Yoshida, M.

AU - Yusa, Y.

AU - Zhang, L. M.

AU - Zhang, Z. P.

AU - Zhilich, V.

AU - Zürcher, D.

PY - 2006/12/1

Y1 - 2006/12/1

N2 - We present the first evidence of the decay B-→τ-ν̄τ, using 414fb-1 of data collected at the Υ(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-→τ-ν̄τ)=(1.79-0.49+0.56(stat) -0.51+0.46(syst))×10-4. This implies that fB=0.229-0.031+0.036(stat)-0. 037+0.034(syst)GeV and is the first direct measurement of this quantity.

AB - We present the first evidence of the decay B-→τ-ν̄τ, using 414fb-1 of data collected at the Υ(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-→τ-ν̄τ)=(1.79-0.49+0.56(stat) -0.51+0.46(syst))×10-4. This implies that fB=0.229-0.031+0.036(stat)-0. 037+0.034(syst)GeV and is the first direct measurement of this quantity.

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U2 - 10.1103/PhysRevLett.97.251802

DO - 10.1103/PhysRevLett.97.251802

M3 - Article

VL - 97

JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

IS - 25

M1 - 251802

ER -

Ikado K, Abe K, Abe K, Adachi I, Aihara H, Akai K et al. Evidence of the purely leptonic decay B-→τ-ν̄τ. Physical Review Letters. 2006 Dec 1;97(25). 251802. https://doi.org/10.1103/PhysRevLett.97.251802