Phys. Rev. Lett.
95,
241801
(2005)
[6 pages]
Determination of |Vub| from Measurements of the Inclusive Charmless Semileptonic Partial Rates of B Mesons using Full Reconstruction Tags
I. Bizjak et al. Belle Collaboration
Show All Authors/Affiliations
Hide All Authors/Affiliations
I. Bizjak12, K. Abe7, K. Abe41, H. Aihara43, Y. Asano47, S. Bahinipati4, A. M. Bakich38, Y. Ban32, E. Barberio19, M. Barbero6, A. Bay16, U. Bitenc12, S. Blyth24, A. Bondar1, A. Bozek25, M. Bračko7,18,12, J. Brodzicka25, T. E. Browder6, Y. Chao24, A. Chen22, W. T. Chen22, B. G. Cheon3, R. Chistov11, S.-K. Choi5, Y. Choi37, Y. K. Choi37, A. Chuvikov33, S. Cole38, J. Dalseno19, M. Danilov11, M. Dash48, L. Y. Dong9, A. Drutskoy4, S. Eidelman1, Y. Enari20, F. Fang6, S. Fratina12, N. Gabyshev1, A. Garmash33, T. Gershon7, G. Gokhroo39, B. Golob17,12, A. Gorišek12, J. Haba7, T. Hara30, H. Hayashii21, M. Hazumi7, L. Hinz16, T. Hokuue20, Y. Hoshi41, S. Hou22, W.-S. Hou24, T. Iijima20, A. Imoto21, K. Inami20, A. Ishikawa7, R. Itoh7, M. Iwasaki43, Y. Iwasaki7, J. H. Kang49, J. S. Kang14, P. Kapusta25, N. Katayama7, H. Kawai2, T. Kawasaki27, H. R. Khan44, H. Kichimi7, H. J. Kim15, S. M. Kim37, K. Kinoshita4, S. Korpar18,12, P. Križan17,12, P. Krokovny1, R. Kulasiri4, S. Kumar31, C. C. Kuo22, A. Kuzmin1, Y.-J. Kwon49, G. Leder10, S. E. Lee36, T. Lesiak25, J. Li35, A. Limosani7, S.-W. Lin24, D. Liventsev11, J. MacNaughton10, G. Majumder39, F. Mandl10, T. Matsumoto45, A. Matyja25, Y. Mikami42, W. Mitaroff10, K. Miyabayashi21, H. Miyake30, H. Miyata27, R. Mizuk11, T. Nagamine42, Y. Nagasaka8, I. Nakamura7, E. Nakano29, M. Nakao7, Z. Natkaniec25, S. Nishida7, O. Nitoh46, T. Nozaki7, S. Ogawa40, T. Ohshima20, T. Okabe20, S. Okuno13, S. L. Olsen6, Y. Onuki27, W. Ostrowicz25, P. Pakhlov11, H. Park15, N. Parslow38, L. S. Peak38, R. Pestotnik12, L. E. Piilonen48, M. Rozanska25, H. Sagawa7, Y. Sakai7, N. Sato20, T. Schietinger16, O. Schneider16, P. Schönmeier42, C. Schwanda10, K. Senyo20, M. E. Sevior19, H. Shibuya40, B. Shwartz1, V. Sidorov1, A. Somov4, N. Soni31, R. Stamen7, S. Stanič28, M. Starič12, T. Sumiyoshi45, S. Suzuki34, S. Y. Suzuki7, O. Tajima7, F. Takasaki7, K. Tamai7, N. Tamura27, M. Tanaka7, Y. Teramoto29, X. C. Tian32, T. Tsuboyama7, T. Tsukamoto7, S. Uehara7, T. Uglov11, K. Ueno24, S. Uno7, P. Urquijo19, G. Varner6, K. E. Varvell38, S. Villa16, C. C. Wang24, C. H. Wang23, Y. Watanabe44, Q. L. Xie9, B. D. Yabsley48, A. Yamaguchi42, Y. Yamashita26, M. Yamauchi7, Heyoung Yang36, L. M. Zhang35, Z. P. Zhang35, V. Zhilich1, and D. Žontar17,12 (Belle Collaboration)
1Budker Institute of Nuclear Physics, Novosibirsk
2Chiba University, Chiba
3Chonnam National University, Kwangju
4University of Cincinnati, Cincinnati, Ohio 45221
5Gyeongsang National University, Chinju
6University of Hawaii, Honolulu, Hawaii 96822
7High Energy Accelerator Research Organization (KEK), Tsukuba
8Hiroshima Institute of Technology, Hiroshima
9Institute of High Energy Physics, Chinese Academy of Sciences, Beijing
10Institute of High Energy Physics, Vienna
11Institute for Theoretical and Experimental Physics, Moscow
12J. Stefan Institute, Ljubljana
13Kanagawa University, Yokohama
14Korea University, Seoul
15Kyungpook National University, Taegu
16Swiss Federal Institute of Technology of Lausanne, EPFL, Lausanne
17University of Ljubljana, Ljubljana
18University of Maribor, Maribor
19University of Melbourne, Victoria
20Nagoya University, Nagoya
21Nara Women’s University, Nara
22National Central University, Chung-li
23National United University, Miao Li
24Department of Physics, National Taiwan University, Taipei
25H. Niewodniczanski Institute of Nuclear Physics, Krakow
26Nippon Dental University, Niigata
27Niigata University, Niigata
28Nova Gorica Polytechnic, Nova Gorica
29Osaka City University, Osaka
30Osaka University, Osaka
31Panjab University, Chandigarh
32Peking University, Beijing
33Princeton University, Princeton, New Jersey 08544
34Saga University, Saga
35University of Science and Technology of China, Hefei
36Seoul National University, Seoul
37Sungkyunkwan University, Suwon
38University of Sydney, Sydney NSW
39Tata Institute of Fundamental Research, Bombay
40Toho University, Funabashi
41Tohoku Gakuin University, Tagajo
42Tohoku University, Sendai
43Department of Physics, University of Tokyo, Tokyo
44Tokyo Institute of Technology, Tokyo
45Tokyo Metropolitan University, Tokyo
46Tokyo University of Agriculture and Technology, Tokyo
47University of Tsukuba, Tsukuba
48Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061
49Yonsei University, Seoul
Received 27 May 2005; published 8 December 2005
We present a measurement of the Cabibbo-Kobayashi-Maskawa matrix element |Vub|, based on 253 fb-1 of data collected by the Belle detector at the KEKB e+e- asymmetric collider. Events are tagged by fully reconstructing one of the B mesons, produced in pairs from Υ(4S). The signal for b→u semileptonic decay is distinguished from the b→c background using the hadronic mass MX, the leptonic invariant mass squared q2 and the variable P+≡EX-|p⃗X|. The results are obtained for events with pℓ*≥1 GeV/c, in three kinematic regions (1) MX<1.7 GeV/c2, (2) MX<1.7 GeV/c2 combined with q2>8 GeV2/c2, and by (3) P+<0.66 GeV/c. The matrix element |Vub| is found to be (4.09±0.19±0.20-0.15+0.14±0.18)×10-3, where the errors are statistical, systematic including Monte Carlo modeling, theoretical, and from shape function parameter determination, respectively.
© 2005 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevLett.95.241801
DOI:
10.1103/PhysRevLett.95.241801
PACS:
12.15.Hh, 11.30.Er, 13.25.Hw
|
|
