Measurement of B(Ds+→μ+νμ)

L. Widhalm; I. Adachi; H. Aihara; T. Aushev; A. M. Bakich; V. Balagura; E. Barberio; A. Bay; I. Bedny; V. Bhardwaj; U. Bitenc; S. Blyth; A. Bozek; M. Bračko; J. Brodzicka; T. E. Browder; Y. Chao; A. Chen; W. T. Chen; B. G. Cheon; R. Chistov; I. S. Cho; Y. Choi; J. Dalseno; M. Dash; A. Drutskoy; S. Eidelman; P. Goldenzweig; B. Golob; H. Ha; J. Haba; K. Hayasaka; H. Hayashii; M. Hazumi; D. Heffernan; Y. Hoshi; W. S. Hou; Y. B. Hsiung; H. J. Hyun; T. Iijima; K. Inami; A. Ishikawa; H. Ishino; R. Itoh; M. Iwasaki; Y. Iwasaki; D. H. Kah; J. H. Kang; P. Kapusta; N. Katayama; H. Kawai; T. Kawasaki; H. Kichimi; S. K. Kim; Y. J. Kim; K. Kinoshita; S. Korpar; P. Križan; P. Krokovny; R. Kumar; C. C. Kuo; Y. Kuroki; A. Kuzmin; Y. J. Kwon; J. Lee; J. S. Lee; M. J. Lee; S. E. Lee; T. Lesiak; S. W. Lin; C. Liu; D. Liventsev; F. Mandl; A. Matyja; S. McOnie; W. Mitaroff; H. Miyake; H. Miyata; Y. Miyazaki; R. Mizuk; G. R. Moloney; E. Nakano; M. Nakao; Z. Natkaniec; S. Nishida; O. Nitoh; S. Noguchi; S. Ogawa; T. Ohshima; S. Okuno; H. Ozaki; P. Pakhlov; G. Pakhlova; H. Palka; C. W. Park; H. Park; K. S. Park; L. S. Peak; R. Pestotnik; L. E. Piilonen; H. Sahoo; Y. Sakai; O. Schneider; R. Seidl; A. Sekiya; K. Senyo; M. Shapkin; H. Shibuya; J. G. Shiu; J. B. Singh; A. Somov; S. Stanič; M. Starič; T. Sumiyoshi; S. Y. Suzuki; F. Takasaki; N. Tamura; M. Tanaka; G. N. Taylor; Y. Teramoto; I. Tikhomirov; K. Trabelsi; S. Uehara; T. Uglov; Y. Unno; S. Uno; P. Urquijo; Y. Usov; G. Varner; K. Vervink; C. H. Wang; M. Z. Wang; P. Wang; Y. Watanabe; R. Wedd; E. Won; B. D. Yabsley; H. Yamamoto; Y. Yamashita; Z. P. Zhang; V. Zhilich; A. Zupanc; O. Zyukova

doi:10.1103/PhysRevLett.100.241801

Measurement of B(Ds+→μ+νμ)

L. Widhalm, I. Adachi, H. Aihara, T. Aushev, A. M. Bakich, V. Balagura, E. Barberio, A. Bay, I. Bedny, V. Bhardwaj, U. Bitenc, S. Blyth, A. Bozek, M. Bračko, J. Brodzicka, T. E. Browder, Y. Chao, A. Chen, W. T. Chen, B. G. CheonR. Chistov, I. S. Cho, Y. Choi, J. Dalseno, M. Dash, A. Drutskoy, S. Eidelman, P. Goldenzweig, B. Golob, H. Ha, J. Haba, K. Hayasaka, H. Hayashii, M. Hazumi, D. Heffernan, Y. Hoshi, W. S. Hou, Y. B. Hsiung, H. J. Hyun, T. Iijima, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, M. Iwasaki, Y. Iwasaki, D. H. Kah, J. H. Kang, P. Kapusta, N. Katayama, H. Kawai, T. Kawasaki, H. Kichimi, S. K. Kim, Y. J. Kim, K. Kinoshita, S. Korpar, P. Križan, P. Krokovny, R. Kumar, C. C. Kuo, Y. Kuroki, A. Kuzmin, Y. J. Kwon, J. Lee, J. S. Lee, M. J. Lee, S. E. Lee, T. Lesiak, S. W. Lin, C. Liu, D. Liventsev, F. Mandl, A. Matyja, S. McOnie, W. Mitaroff, H. Miyake, H. Miyata, Y. Miyazaki, R. Mizuk, G. R. Moloney, E. Nakano, M. Nakao, Z. Natkaniec, S. Nishida, O. Nitoh, S. Noguchi, S. Ogawa, T. Ohshima, S. Okuno, H. Ozaki, P. Pakhlov, G. Pakhlova, H. Palka, C. W. Park, H. Park, K. S. Park, L. S. Peak, R. Pestotnik, L. E. Piilonen, H. Sahoo, Y. Sakai, O. Schneider, R. Seidl, A. Sekiya, K. Senyo, M. Shapkin, H. Shibuya, J. G. Shiu, J. B. Singh, A. Somov, S. Stanič, M. Starič, T. Sumiyoshi, S. Y. Suzuki, F. Takasaki, N. Tamura, M. Tanaka, G. N. Taylor, Y. Teramoto, I. Tikhomirov, K. Trabelsi, S. Uehara, T. Uglov, Y. Unno, S. Uno, P. Urquijo, Y. Usov, G. Varner, K. Vervink, C. H. Wang, M. Z. Wang, P. Wang, Y. Watanabe, R. Wedd, E. Won, B. D. Yabsley, H. Yamamoto, Y. Yamashita, Z. P. Zhang, V. Zhilich, A. Zupanc, O. Zyukova

Department of Physics

Research output: Contribution to journal › Article

58 Citations (Scopus)

Abstract

We present a measurement of the branching fraction B(Ds+→μ+νμ ) using a 548fb-1 data sample collected by the Belle experiment at the KEKB e+e- collider. The Ds momentum is determined by reconstruction of the system recoiling against DKγX in events of the type e+e-→Ds*DKX, Ds*→Dsγ, where X represents additional pions or photons from fragmentation. This full-reconstruction method provides high resolution in the neutrino momentum and thus good background separation, equivalent to that achieved by experiments at the tau-charm factories. We obtain the branching fraction B(Ds+→μ+νμ)=[6.44±0.76(stat)±0.57(syst)] ×10-3, implying a Ds decay constant of fDs=[275±16(stat) ±12(syst)]MeV.

Original language	English
Article number	241801
Journal	Physical review letters
Volume	100
Issue number	24
DOIs	https://doi.org/10.1103/PhysRevLett.100.241801
Publication status	Published - 2008 Jun 17

ASJC Scopus subject areas

Physics and Astronomy(all)

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Widhalm, L., Adachi, I., Aihara, H., Aushev, T., Bakich, A. M., Balagura, V., Barberio, E., Bay, A., Bedny, I., Bhardwaj, V., Bitenc, U., Blyth, S., Bozek, A., Bračko, M., Brodzicka, J., Browder, T. E., Chao, Y., Chen, A., Chen, W. T., ... Zyukova, O. (2008). Measurement of B(Ds+→μ+νμ). Physical review letters, 100(24), [241801]. https://doi.org/10.1103/PhysRevLett.100.241801

Measurement of B(Ds+→μ+νμ). / Widhalm, L.; Adachi, I.; Aihara, H.; Aushev, T.; Bakich, A. M.; Balagura, V.; Barberio, E.; Bay, A.; Bedny, I.; Bhardwaj, V.; Bitenc, U.; Blyth, S.; Bozek, A.; Bračko, M.; Brodzicka, J.; Browder, T. E.; Chao, Y.; Chen, A.; Chen, W. T.; Cheon, B. G.; Chistov, R.; Cho, I. S.; Choi, Y.; Dalseno, J.; Dash, M.; Drutskoy, A.; Eidelman, S.; Goldenzweig, P.; Golob, B.; Ha, H.; Haba, J.; Hayasaka, K.; Hayashii, H.; Hazumi, M.; Heffernan, D.; Hoshi, Y.; Hou, W. S.; Hsiung, Y. B.; Hyun, H. J.; Iijima, T.; Inami, K.; Ishikawa, A.; Ishino, H.; Itoh, R.; Iwasaki, M.; Iwasaki, Y.; Kah, D. H.; Kang, J. H.; Kapusta, P.; Katayama, N.; Kawai, H.; Kawasaki, T.; Kichimi, H.; Kim, S. K.; Kim, Y. J.; Kinoshita, K.; Korpar, S.; Križan, P.; Krokovny, P.; Kumar, R.; Kuo, C. C.; Kuroki, Y.; Kuzmin, A.; Kwon, Y. J.; Lee, J.; Lee, J. S.; Lee, M. J.; Lee, S. E.; Lesiak, T.; Lin, S. W.; Liu, C.; Liventsev, D.; Mandl, F.; Matyja, A.; McOnie, S.; Mitaroff, W.; Miyake, H.; Miyata, H.; Miyazaki, Y.; Mizuk, R.; Moloney, G. R.; Nakano, E.; Nakao, M.; Natkaniec, Z.; Nishida, S.; Nitoh, O.; Noguchi, S.; Ogawa, S.; Ohshima, T.; Okuno, S.; Ozaki, H.; Pakhlov, P.; Pakhlova, G.; Palka, H.; Park, C. W.; Park, H.; Park, K. S.; Peak, L. S.; Pestotnik, R.; Piilonen, L. E.; Sahoo, H.; Sakai, Y.; Schneider, O.; Seidl, R.; Sekiya, A.; Senyo, K.; Shapkin, M.; Shibuya, H.; Shiu, J. G.; Singh, J. B.; Somov, A.; Stanič, S.; Starič, M.; Sumiyoshi, T.; Suzuki, S. Y.; Takasaki, F.; Tamura, N.; Tanaka, M.; Taylor, G. N.; Teramoto, Y.; Tikhomirov, I.; Trabelsi, K.; Uehara, S.; Uglov, T.; Unno, Y.; Uno, S.; Urquijo, P.; Usov, Y.; Varner, G.; Vervink, K.; Wang, C. H.; Wang, M. Z.; Wang, P.; Watanabe, Y.; Wedd, R.; Won, E.; Yabsley, B. D.; Yamamoto, H.; Yamashita, Y.; Zhang, Z. P.; Zhilich, V.; Zupanc, A.; Zyukova, O.

In: Physical review letters, Vol. 100, No. 24, 241801, 17.06.2008.

Research output: Contribution to journal › Article

Widhalm, L, Adachi, I, Aihara, H, Aushev, T, Bakich, AM, Balagura, V, Barberio, E, Bay, A, Bedny, I, Bhardwaj, V, Bitenc, U, Blyth, S, Bozek, A, Bračko, M, Brodzicka, J, Browder, TE, Chao, Y, Chen, A, Chen, WT, Cheon, BG, Chistov, R, Cho, IS, Choi, Y, Dalseno, J, Dash, M, Drutskoy, A, Eidelman, S, Goldenzweig, P, Golob, B, Ha, H, Haba, J, Hayasaka, K, Hayashii, H, Hazumi, M, Heffernan, D, Hoshi, Y, Hou, WS, Hsiung, YB, Hyun, HJ, Iijima, T, Inami, K, Ishikawa, A, Ishino, H, Itoh, R, Iwasaki, M, Iwasaki, Y, Kah, DH, Kang, JH, Kapusta, P, Katayama, N, Kawai, H, Kawasaki, T, Kichimi, H, Kim, SK, Kim, YJ, Kinoshita, K, Korpar, S, Križan, P, Krokovny, P, Kumar, R, Kuo, CC, Kuroki, Y, Kuzmin, A, Kwon, YJ, Lee, J, Lee, JS, Lee, MJ, Lee, SE, Lesiak, T, Lin, SW, Liu, C, Liventsev, D, Mandl, F, Matyja, A, McOnie, S, Mitaroff, W, Miyake, H, Miyata, H, Miyazaki, Y, Mizuk, R, Moloney, GR, Nakano, E, Nakao, M, Natkaniec, Z, Nishida, S, Nitoh, O, Noguchi, S, Ogawa, S, Ohshima, T, Okuno, S, Ozaki, H, Pakhlov, P, Pakhlova, G, Palka, H, Park, CW, Park, H, Park, KS, Peak, LS, Pestotnik, R, Piilonen, LE, Sahoo, H, Sakai, Y, Schneider, O, Seidl, R, Sekiya, A, Senyo, K, Shapkin, M, Shibuya, H, Shiu, JG, Singh, JB, Somov, A, Stanič, S, Starič, M, Sumiyoshi, T, Suzuki, SY, Takasaki, F, Tamura, N, Tanaka, M, Taylor, GN, Teramoto, Y, Tikhomirov, I, Trabelsi, K, Uehara, S, Uglov, T, Unno, Y, Uno, S, Urquijo, P, Usov, Y, Varner, G, Vervink, K, Wang, CH, Wang, MZ, Wang, P, Watanabe, Y, Wedd, R, Won, E, Yabsley, BD, Yamamoto, H, Yamashita, Y, Zhang, ZP, Zhilich, V, Zupanc, A & Zyukova, O 2008, 'Measurement of B(Ds+→μ+νμ)', Physical review letters, vol. 100, no. 24, 241801. https://doi.org/10.1103/PhysRevLett.100.241801

Widhalm, L. ; Adachi, I. ; Aihara, H. ; Aushev, T. ; Bakich, A. M. ; Balagura, V. ; Barberio, E. ; Bay, A. ; Bedny, I. ; Bhardwaj, V. ; Bitenc, U. ; Blyth, S. ; Bozek, A. ; Bračko, M. ; Brodzicka, J. ; Browder, T. E. ; Chao, Y. ; Chen, A. ; Chen, W. T. ; Cheon, B. G. ; Chistov, R. ; Cho, I. S. ; Choi, Y. ; Dalseno, J. ; Dash, M. ; Drutskoy, A. ; Eidelman, S. ; Goldenzweig, P. ; Golob, B. ; Ha, H. ; Haba, J. ; Hayasaka, K. ; Hayashii, H. ; Hazumi, M. ; Heffernan, D. ; Hoshi, Y. ; Hou, W. S. ; Hsiung, Y. B. ; Hyun, H. J. ; Iijima, T. ; Inami, K. ; Ishikawa, A. ; Ishino, H. ; Itoh, R. ; Iwasaki, M. ; Iwasaki, Y. ; Kah, D. H. ; Kang, J. H. ; Kapusta, P. ; Katayama, N. ; Kawai, H. ; Kawasaki, T. ; Kichimi, H. ; Kim, S. K. ; Kim, Y. J. ; Kinoshita, K. ; Korpar, S. ; Križan, P. ; Krokovny, P. ; Kumar, R. ; Kuo, C. C. ; Kuroki, Y. ; Kuzmin, A. ; Kwon, Y. J. ; Lee, J. ; Lee, J. S. ; Lee, M. J. ; Lee, S. E. ; Lesiak, T. ; Lin, S. W. ; Liu, C. ; Liventsev, D. ; Mandl, F. ; Matyja, A. ; McOnie, S. ; Mitaroff, W. ; Miyake, H. ; Miyata, H. ; Miyazaki, Y. ; Mizuk, R. ; Moloney, G. R. ; Nakano, E. ; Nakao, M. ; Natkaniec, Z. ; Nishida, S. ; Nitoh, O. ; Noguchi, S. ; Ogawa, S. ; Ohshima, T. ; Okuno, S. ; Ozaki, H. ; Pakhlov, P. ; Pakhlova, G. ; Palka, H. ; Park, C. W. ; Park, H. ; Park, K. S. ; Peak, L. S. ; Pestotnik, R. ; Piilonen, L. E. ; Sahoo, H. ; Sakai, Y. ; Schneider, O. ; Seidl, R. ; Sekiya, A. ; Senyo, K. ; Shapkin, M. ; Shibuya, H. ; Shiu, J. G. ; Singh, J. B. ; Somov, A. ; Stanič, S. ; Starič, M. ; Sumiyoshi, T. ; Suzuki, S. Y. ; Takasaki, F. ; Tamura, N. ; Tanaka, M. ; Taylor, G. N. ; Teramoto, Y. ; Tikhomirov, I. ; Trabelsi, K. ; Uehara, S. ; Uglov, T. ; Unno, Y. ; Uno, S. ; Urquijo, P. ; Usov, Y. ; Varner, G. ; Vervink, K. ; Wang, C. H. ; Wang, M. Z. ; Wang, P. ; Watanabe, Y. ; Wedd, R. ; Won, E. ; Yabsley, B. D. ; Yamamoto, H. ; Yamashita, Y. ; Zhang, Z. P. ; Zhilich, V. ; Zupanc, A. ; Zyukova, O. / Measurement of B(Ds+→μ+νμ). In: Physical review letters. 2008 ; Vol. 100, No. 24.

@article{a142c9f29c894ac9aff6020e3eb03303,

title = "Measurement of B(Ds+→μ+νμ)",

abstract = "We present a measurement of the branching fraction B(Ds+→μ+νμ ) using a 548fb-1 data sample collected by the Belle experiment at the KEKB e+e- collider. The Ds momentum is determined by reconstruction of the system recoiling against DKγX in events of the type e+e-→Ds*DKX, Ds*→Dsγ, where X represents additional pions or photons from fragmentation. This full-reconstruction method provides high resolution in the neutrino momentum and thus good background separation, equivalent to that achieved by experiments at the tau-charm factories. We obtain the branching fraction B(Ds+→μ+νμ)=[6.44±0.76(stat)±0.57(syst)] ×10-3, implying a Ds decay constant of fDs=[275±16(stat) ±12(syst)]MeV.",

author = "L. Widhalm and I. Adachi and H. Aihara and T. Aushev and Bakich, {A. M.} and V. Balagura and E. Barberio and A. Bay and I. Bedny and V. Bhardwaj and U. Bitenc and S. Blyth and A. Bozek and M. Bra{\v c}ko and J. Brodzicka and Browder, {T. E.} and Y. Chao and A. Chen and Chen, {W. T.} and Cheon, {B. G.} and R. Chistov and Cho, {I. S.} and Y. Choi and J. Dalseno and M. Dash and A. Drutskoy and S. Eidelman and P. Goldenzweig and B. Golob and H. Ha and J. Haba and K. Hayasaka and H. Hayashii and M. Hazumi and D. Heffernan and Y. Hoshi and Hou, {W. S.} and Hsiung, {Y. B.} and Hyun, {H. J.} and T. Iijima and K. Inami and A. Ishikawa and H. Ishino and R. Itoh and M. Iwasaki and Y. Iwasaki and Kah, {D. H.} and Kang, {J. H.} and P. Kapusta and N. Katayama and H. Kawai and T. Kawasaki and H. Kichimi and Kim, {S. K.} and Kim, {Y. J.} and K. Kinoshita and S. Korpar and P. Kri{\v z}an and P. Krokovny and R. Kumar and Kuo, {C. C.} and Y. Kuroki and A. Kuzmin and Kwon, {Y. J.} and J. Lee and Lee, {J. S.} and Lee, {M. J.} and Lee, {S. E.} and T. Lesiak and Lin, {S. W.} and C. Liu and D. Liventsev and F. Mandl and A. Matyja and S. McOnie and W. Mitaroff and H. Miyake and H. Miyata and Y. Miyazaki and R. Mizuk and Moloney, {G. R.} and E. Nakano and M. Nakao and Z. Natkaniec and S. Nishida and O. Nitoh and S. Noguchi and S. Ogawa and T. Ohshima and S. Okuno and H. Ozaki and P. Pakhlov and G. Pakhlova and H. Palka and Park, {C. W.} and H. Park and Park, {K. S.} and Peak, {L. S.} and R. Pestotnik and Piilonen, {L. E.} and H. Sahoo and Y. Sakai and O. Schneider and R. Seidl and A. Sekiya and K. Senyo and M. Shapkin and H. Shibuya and Shiu, {J. G.} and Singh, {J. B.} and A. Somov and S. Stani{\v c} and M. Stari{\v c} and T. Sumiyoshi and Suzuki, {S. Y.} and F. Takasaki and N. Tamura and M. Tanaka and Taylor, {G. N.} and Y. Teramoto and I. Tikhomirov and K. Trabelsi and S. Uehara and T. Uglov and Y. Unno and S. Uno and P. Urquijo and Y. Usov and G. Varner 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 H. Yamamoto and Y. Yamashita and Zhang, {Z. P.} and V. Zhilich and A. Zupanc and O. Zyukova",

year = "2008",

month = jun,

day = "17",

doi = "10.1103/PhysRevLett.100.241801",

language = "English",

volume = "100",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "24",

}

TY - JOUR

T1 - Measurement of B(Ds+→μ+νμ)

AU - Widhalm, L.

AU - Adachi, I.

AU - Aihara, H.

AU - Aushev, T.

AU - Bakich, A. M.

AU - Balagura, V.

AU - Barberio, E.

AU - Bay, A.

AU - Bedny, I.

AU - Bhardwaj, V.

AU - Bitenc, U.

AU - Blyth, S.

AU - Bozek, A.

AU - Bračko, M.

AU - Brodzicka, J.

AU - Browder, T. E.

AU - Chao, Y.

AU - Chen, A.

AU - Chen, W. T.

AU - Cheon, B. G.

AU - Chistov, R.

AU - Cho, I. S.

AU - Choi, Y.

AU - Dalseno, J.

AU - Dash, M.

AU - Drutskoy, A.

AU - Eidelman, S.

AU - Goldenzweig, P.

AU - Golob, B.

AU - Ha, H.

AU - Haba, J.

AU - Hayasaka, K.

AU - Hayashii, H.

AU - Hazumi, M.

AU - Heffernan, D.

AU - Hoshi, Y.

AU - Hou, W. S.

AU - Hsiung, Y. B.

AU - Hyun, H. J.

AU - Iijima, T.

AU - Inami, K.

AU - Ishikawa, A.

AU - Ishino, H.

AU - Itoh, R.

AU - Iwasaki, M.

AU - Iwasaki, Y.

AU - Kah, D. H.

AU - Kang, J. H.

AU - Kapusta, P.

AU - Katayama, N.

AU - Kawai, H.

AU - Kawasaki, T.

AU - Kichimi, H.

AU - Kim, S. K.

AU - Kim, Y. J.

AU - Kinoshita, K.

AU - Korpar, S.

AU - Križan, P.

AU - Krokovny, P.

AU - Kumar, R.

AU - Kuo, C. C.

AU - Kuroki, Y.

AU - Kuzmin, A.

AU - Kwon, Y. J.

AU - Lee, J.

AU - Lee, J. S.

AU - Lee, M. J.

AU - Lee, S. E.

AU - Lesiak, T.

AU - Lin, S. W.

AU - Liu, C.

AU - Liventsev, D.

AU - Mandl, F.

AU - Matyja, A.

AU - McOnie, S.

AU - Mitaroff, W.

AU - Miyake, H.

AU - Miyata, H.

AU - Miyazaki, Y.

AU - Mizuk, R.

AU - Moloney, G. R.

AU - Nakano, E.

AU - Nakao, M.

AU - Natkaniec, Z.

AU - Nishida, S.

AU - Nitoh, O.

AU - Noguchi, S.

AU - Ogawa, S.

AU - Ohshima, T.

AU - Okuno, S.

AU - Ozaki, H.

AU - Pakhlov, P.

AU - Pakhlova, G.

AU - Palka, H.

AU - Park, C. W.

AU - Park, H.

AU - Park, K. S.

AU - Peak, L. S.

AU - Pestotnik, R.

AU - Piilonen, L. E.

AU - Sahoo, H.

AU - Sakai, Y.

AU - Schneider, O.

AU - Seidl, R.

AU - Sekiya, A.

AU - Senyo, K.

AU - Shapkin, M.

AU - Shibuya, H.

AU - Shiu, J. G.

AU - Singh, J. B.

AU - Somov, A.

AU - Stanič, S.

AU - Starič, M.

AU - Sumiyoshi, T.

AU - Suzuki, S. Y.

AU - Takasaki, F.

AU - Tamura, N.

AU - Tanaka, M.

AU - Taylor, G. N.

AU - Teramoto, Y.

AU - Tikhomirov, I.

AU - Trabelsi, K.

AU - Uehara, S.

AU - Uglov, T.

AU - Unno, Y.

AU - Uno, S.

AU - Urquijo, P.

AU - Usov, Y.

AU - Varner, G.

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 - Yamamoto, H.

AU - Yamashita, Y.

AU - Zhang, Z. P.

AU - Zhilich, V.

AU - Zupanc, A.

AU - Zyukova, O.

PY - 2008/6/17

Y1 - 2008/6/17

N2 - We present a measurement of the branching fraction B(Ds+→μ+νμ ) using a 548fb-1 data sample collected by the Belle experiment at the KEKB e+e- collider. The Ds momentum is determined by reconstruction of the system recoiling against DKγX in events of the type e+e-→Ds*DKX, Ds*→Dsγ, where X represents additional pions or photons from fragmentation. This full-reconstruction method provides high resolution in the neutrino momentum and thus good background separation, equivalent to that achieved by experiments at the tau-charm factories. We obtain the branching fraction B(Ds+→μ+νμ)=[6.44±0.76(stat)±0.57(syst)] ×10-3, implying a Ds decay constant of fDs=[275±16(stat) ±12(syst)]MeV.

AB - We present a measurement of the branching fraction B(Ds+→μ+νμ ) using a 548fb-1 data sample collected by the Belle experiment at the KEKB e+e- collider. The Ds momentum is determined by reconstruction of the system recoiling against DKγX in events of the type e+e-→Ds*DKX, Ds*→Dsγ, where X represents additional pions or photons from fragmentation. This full-reconstruction method provides high resolution in the neutrino momentum and thus good background separation, equivalent to that achieved by experiments at the tau-charm factories. We obtain the branching fraction B(Ds+→μ+νμ)=[6.44±0.76(stat)±0.57(syst)] ×10-3, implying a Ds decay constant of fDs=[275±16(stat) ±12(syst)]MeV.

UR - http://www.scopus.com/inward/record.url?scp=45549098438&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=45549098438&partnerID=8YFLogxK

U2 - 10.1103/PhysRevLett.100.241801

DO - 10.1103/PhysRevLett.100.241801

M3 - Article

AN - SCOPUS:45549098438

VL - 100

JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

IS - 24

M1 - 241801

ER -