Phys. Rev. D
72,
051105(R)
(2005)
[6 pages]
Observation of B-→J/ψΛp̅ and searches for B-→J/ψΣ0p̅ and B0→J/ψpp̅ decays
Q. L. Xie et al. Belle Collaboration
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Q. L. Xie8,*, K. Abe6, K. Abe39, I. Adachi6, H. Aihara41, Y. Asano45, T. Aushev10, S. Bahinipati4, A. M. Bakich36, E. Barberio17, M. Barbero5, I. Bedny1, U. Bitenc11, I. Bizjak11, S. Blyth20, A. Bondar1, A. Bozek23, M. Bračko6,16,11, J. Brodzicka23, T. E. Browder5, Y. Chao22, A. Chen20, W. T. Chen20, B. G. Cheon3, R. Chistov10, Y. Choi35, A. Chuvikov31, S. Cole36, J. Dalseno17, M. Danilov10, M. Dash46, L. Y. Dong8, A. Drutskoy4, S. Eidelman1, Y. Enari18, S. Fratina11, N. Gabyshev1, T. Gershon6, A. Go20, G. Gokhroo37, B. Golob15,11, A. Gorišek11, J. Haba6, K. Hayasaka18, H. Hayashii19, M. Hazumi6, L. Hinz14, T. Hokuue18, Y. Hoshi39, S. Hou20, W.-S. Hou22, Y. B. Hsiung22, T. Iijima18, K. Ikado18, A. Imoto19, A. Ishikawa6, R. Itoh6, M. Iwasaki41, Y. Iwasaki6, J. H. Kang47, J. S. Kang13, P. Kapusta23, S. U. Kataoka19, N. Katayama6, H. Kawai2, T. Kawasaki25, H. R. Khan42, H. Kichimi6, J. H. Kim35, S. M. Kim35, K. Kinoshita4, P. Krokovny1, C. C. Kuo20, Y.-J. Kwon47, G. Leder9, S. E. Lee33, T. Lesiak23, J. Li32, D. Liventsev10, F. Mandl9, T. Matsumoto43, A. Matyja23, W. Mitaroff9, K. Miyabayashi19, H. Miyake28, H. Miyata25, Y. Miyazaki18, R. Mizuk10, G. R. Moloney17, T. Nagamine40, Y. Nagasaka7, E. Nakano27, Z. Natkaniec23, S. Nishida6, O. Nitoh44, T. Nozaki6, S. Ogawa38, T. Ohshima18, S. Okuno12, S. L. Olsen5, Y. Onuki25, W. Ostrowicz23, H. Ozaki6, P. Pakhlov10, H. Palka23, C. W. Park35, N. Parslow36, R. Pestotnik11, L. E. Piilonen46, Y. Sakai6, N. Satoyama34, K. Sayeed4, O. Schneider14, M. E. Sevior17, H. Shibuya38, B. Shwartz1, V. Sidorov1, A. Somov4, N. Soni29, S. Stanič26, M. Starič11, K. Sumisawa28, T. Sumiyoshi43, F. Takasaki6, K. Tamai6, M. Tanaka6, Y. Teramoto27, X. C. Tian30, K. Trabelsi5, T. Tsuboyama6, T. Tsukamoto6, S. Uehara6, T. Uglov10, Y. Unno6, S. Uno6, P. Urquijo17, G. Varner5, K. E. Varvell36, S. Villa14, C. H. Wang21, M.-Z. Wang22, Y. Watanabe42, E. Won13, A. Yamaguchi40, Y. Yamashita24, M. Yamauchi6, J. Ying30, Y. Yuan8, S. L. Zang8, C. C. Zhang8, J. Zhang6, L. M. Zhang32, Z. P. Zhang32, V. Zhilich1, and T. Ziegler31 (Belle Collaboration)
1Budker Institute of Nuclear Physics, Novosibirsk
2Chiba University, Chiba
3Chonnam National University, Kwangju
4University of Cincinnati, Cincinnati, Ohio 45221
5University of Hawaii, Honolulu, Hawaii 96822
6High Energy Accelerator Research Organization (KEK), Tsukuba
7Hiroshima Institute of Technology, Hiroshima
8Institute of High Energy Physics, Chinese Academy of Sciences, Beijing
9Institute of High Energy Physics, Vienna
10Institute for Theoretical and Experimental Physics, Moscow
11J. Stefan Institute, Ljubljana
12Kanagawa University, Yokohama
13Korea University, Seoul
14Swiss Federal Institute of Technology of Lausanne, EPFL, Lausanne
15University of Ljubljana, Ljubljana
16University of Maribor, Maribor
17University of Melbourne, Victoria
18Nagoya University, Nagoya
19Nara Women’s University, Nara
20National Central University, Chung-li
21National United University, Miao Li
22Department of Physics, National Taiwan University, Taipei
23H. Niewodniczanski Institute of Nuclear Physics, Krakow
24Nippon Dental University, Niigata
25Niigata University, Niigata
26Nova Gorica Polytechnic, Nova Gorica
27Osaka City University, Osaka
28Osaka University, Osaka
29Panjab University, Chandigarh
30Peking University, Beijing
31Princeton University, Princeton, New Jersey 08544
32University of Science and Technology of China, Hefei
33Seoul National University, Seoul
34Shinshu University, Nagano
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
Received 4 August 2005; published 26 September 2005
We report the observation of B-→J/ψΛp̅ and searches for B-→J/ψΣ0p̅ and B0→J/ψpp̅ decays, using a sample of 275×106 BB̅ pairs collected with the Belle detector at the Υ(4S) resonance. We observe a signal of 17.2±4.1 events with a significance of 11.1σ and obtain a branching fraction of B(B-→J/ψΛp̅ )=11.6±2.8(stat)-2.3+1.8(sys)×10-6. No signal is found for either of the two decay modes, B-→J/ψΣ0p̅ and B0→J/ψpp̅ , and upper limits for the branching fractions are determined to be B(B-→J/ψΣ0p̅ )<1.1×10-5 and B(B0→J/ψpp̅ )<8.3×10-7 at 90% confidence level.
© 2005 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevD.72.051105
DOI:
10.1103/PhysRevD.72.051105
PACS:
13.25.Hw, 14.40.Gx, 14.40.Nd
*Present adderess: Physics Department of Sichuan University, Sichuan Province, China.
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