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.
2008
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. © 2008 The American Physical Society.
Details
Title
Measurement of B(Ds+→μ+νμ)
Author(s)
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.
Published in
Physical Review Letters
Volume
100
Issue
24
Pages
241801
Date
2008
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Laboratories
LPHE
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Scientific production and competences > SB - School of Basic Sciences > IPHYS - Institute of Physics > LPHE - High Energy Physics Laboratory
Peer-reviewed publications
Work produced at EPFL
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Peer-reviewed publications
Work produced at EPFL
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Record creation date
2010-11-05