Phys. Rev. Lett.
94,
182002
(2005)
[6 pages]
Observation of a Near-Threshold ωJ/ψ Mass Enhancement in Exclusive B→KωJ/ψ Decays
S.-K. Choi et al. Belle Collaboration
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S.-K. Choi6, S. L. Olsen7, K. Abe8, K. Abe39, I. Adachi8, H. Aihara41, Y. Asano45, S. Bahinipati4, A. M. Bakich36, Y. Ban31, I. Bedny1, U. Bitenc12, I. Bizjak12, A. Bondar1, A. Bozek25, M. Bračko8,18,12, J. Brodzicka25, T. E. Browder7, M.-C. Chang24, P. Chang24, A. Chen22, W. T. Chen22, B. G. Cheon3, R. Chistov11, Y. Choi35, A. Chuvikov48, S. Cole36, J. Dalseno19, M. Danilov11, M. Dash46, A. Drutskoy4, S. Eidelman1, Y. Enari20, F. Fang7, S. Fratina12, N. Gabyshev1, T. Gershon8, G. Gokhroo37, B. Golob17,12, T. Hara29, N. C. Hastings8, K. Hayasaka20, H. Hayashii21, M. Hazumi8, L. Hinz16, T. Hokuue20, Y. Hoshi39, S. Hou22, W.-S. Hou24, Y. B. Hsiung24, T. Iijima20, A. Imoto21, K. Inami20, A. Ishikawa8, M. Iwasaki41, Y. Iwasaki8, J. H. Kang47, J. S. Kang14, S. U. Kataoka21, N. Katayama8, H. Kawai2, T. Kawasaki27, H. R. Khan42, H. Kichimi8, H. J. Kim15, S. M. Kim35, K. Kinoshita4, S. Korpar18,12, P. Križan17,12, P. Krokovny1, C. C. Kuo22, A. Kuzmin1, Y.-J. Kwon47, J. S. Lange5, S. E. Lee34, S. H. Lee34, T. Lesiak25, J. Li33, S.-W. Lin24, D. Liventsev11, G. Majumder37, T. Matsumoto43, A. Matyja25, W. Mitaroff10, K. Miyabayashi21, H. Miyata27, R. Mizuk11, D. Mohapatra46, G. R. Moloney19, E. Nakano28, M. Nakao8, H. Nakazawa8, S. Nishida8, O. Nitoh44, S. Ogawa38, T. Ohshima20, T. Okabe20, S. Okuno13, W. Ostrowicz25, H. Palka25, C. W. Park35, N. Parslow36, R. Pestotnik12, L. E. Piilonen46, M. Rozanska25, H. Sagawa8, Y. Sakai8, N. Sato20, T. Schietinger16, O. Schneider16, C. Schwanda10, H. Shibuya38, B. Shwartz1, A. Somov4, N. Soni30, S. Stanič45,*, M. Starič12, T. Sumiyoshi43, S. Suzuki32, S. Y. Suzuki8, O. Tajima8, F. Takasaki8, K. Tamai8, N. Tamura27, Y. Teramoto28, X. C. Tian31, K. Trabelsi7, S. Uehara8, T. Uglov11, S. Uno8, G. Varner7, K. E. Varvell36, S. Villa16, C. H. Wang23, M.-Z. Wang24, M. Watanabe27, B. D. Yabsley46, A. Yamaguchi40, Y. Yamashita26, M. Yamauchi8, Heyoung Yang34, Y. Yuan9, Y. Yusa40, C. C. Zhang9, J. Zhang8, L. M. Zhang33, Z. P. Zhang33, D. Žontar17,12, and D. Zürcher16 (Belle Collaboration)
1Budker Institute of Nuclear Physics, Novosibirsk
2Chiba University, Chiba
3Chonnam National University, Kwangju
4University of Cincinnati, Cincinnati, Ohio 45221
5University of Frankfurt, Frankfurt
6Gyeongsang National University, Chinju
7University of Hawaii, Honolulu, Hawaii 96822
8High Energy Accelerator Research Organization (KEK), Tsukuba
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
26Nihon Dental College, Niigata
27Niigata University, Niigata
28Osaka City University, Osaka
29Osaka University, Osaka
30Panjab University, Chandigarh
31Peking University, Beijing
32Saga University, Saga
33University of Science and Technology of China, Hefei
34Seoul National University, Seoul
35Sungkyunkwan University, Suwon
36University of Sydney, Sydney NSW
37Tata Institute of Fundamental Research, Bombay
38Toho University, Funabashi
39Tohoku Gakuin University, Tagajo
40Tohoku University, Sendai
41Department of Physics, University of Tokyo, Tokyo
42Tokyo Institute of Technology, Tokyo
43Tokyo Metropolitan University, Tokyo
44Tokyo University of Agriculture and Technology, Tokyo
45University of Tsukuba, Tsukuba
46Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061
47Yonsei University, Seoul
48Princeton University, Princeton, New Jersey 08545
Received 23 December 2004; published 12 May 2005
We report the observation of a near-threshold enhancement in the ωJ/ψ invariant mass distribution for exclusive B→KωJ/ψ decays. The results are obtained from a 253 fb-1 data sample that contains 275×106 BB̅ pairs that were collected near the Υ(4S) resonance with the Belle detector at the KEKB asymmetric energy e+e- collider. The statistical significance of the ωJ/ψ mass enhancement is estimated to be greater than 8σ.
© 2005 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevLett.94.182002
DOI:
10.1103/PhysRevLett.94.182002
PACS:
14.40.Gx, 12.39.Mk, 13.25.Hw
*On leave from Nova Gorica Polytechnic, Nova Gorica.
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