Phys. Rev. D
71,
072006
(2005)
[8 pages]
Observation of pp̅ π0 and pp̅ η in ψ′ decays
M. Ablikim et al. BES Collaboration
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M. Ablikim1, J. Z. Bai1, Y. Ban11, J. G. Bian1, X. Cai1, J. F. Chang1, H. F. Chen17, H. S. Chen1, H. X. Chen1, J. C. Chen1, Jin Chen1, Jun Chen7, M. L. Chen1, Y. B. Chen1, S. P. Chi2, Y. P. Chu1, X. Z. Cui1, H. L. Dai1, Y. S. Dai19, Z. Y. Deng1, L. Y. Dong1,*, Q. F. Dong15, S. X. Du1, Z. Z. Du1, J. Fang1, S. S. Fang2, C. D. Fu1, H. Y. Fu1, C. S. Gao1, Y. N. Gao15, M. Y. Gong1, W. X. Gong1, S. D. Gu1, Y. N. Guo1, Y. Q. Guo1, Z. J. Guo16, F. A. Harris16, K. L. He1, M. He12, X. He1, Y. K. Heng1, H. M. Hu1, T. Hu1, G. S. Huang1,*, X. P. Huang1, X. T. Huang12, X. B. Ji1, C. H. Jiang1, X. S. Jiang1, D. P. Jin1, S. Jin1, Y. Jin1, Yi Jin1, Y. F. Lai1, F. Li1, G. Li2, H. H. Li1, J. Li1, J. C. Li1, Q. J. Li1, R. Y. Li1, S. M. Li1, W. D. Li1, W. G. Li1, X. L. Li8, X. Q. Li10, Y. L. Li4, Y. F. Liang14, H. B. Liao6, C. X. Liu1, F. Liu6, Fang Liu17, H. H. Liu1, H. M. Liu1, J. Liu11, J. B. Liu1, J. P. Liu18, R. G. Liu1, Z. A. Liu1, Z. X. Liu1, F. Lu1, G. R. Lu5, H. J. Lu17, J. G. Lu1, C. L. Luo9, L. X. Luo4, X. L. Luo1, F. C. Ma8, H. L. Ma1, J. M. Ma1, L. L. Ma1, Q. M. Ma1, X. B. Ma5, X. Y. Ma1, Z. P. Mao1, X. H. Mo1, J. Nie1, Z. D. Nie1, S. L. Olsen16, H. P. Peng17, N. D. Qi1, C. D. Qian13, H. Qin9, J. F. Qiu1, Z. Y. Ren1, G. Rong1, L. Y. Shan1, L. Shang1, D. L. Shen1, X. Y. Shen1, H. Y. Sheng1, F. Shi1, X. Shi11,‡, H. S. Sun1, J. F. Sun1, S. S. Sun1, Y. Z. Sun1, Z. J. Sun1, X. Tang1, N. Tao17, Y. R. Tian15, G. L. Tong1, G. S. Varner16, D. Y. Wang1, J. Z. Wang1, K. Wang17, L. Wang1, L. S. Wang1, M. Wang1, P. Wang1, P. L. Wang1, S. Z. Wang1, W. F. Wang1,§, Y. F. Wang1, Z. Wang1, Z. Y. Wang1, Zhe Wang1, Zheng Wang2, C. L. Wei1, D. H. Wei1, N. Wu1, Y. M. Wu1, X. M. Xia1, X. X. Xie1, B. Xin8,†, G. F. Xu1, H. Xu1, S. T. Xue1, M. L. Yan17, F. Yang10, H. X. Yang1, J. Yang17, Y. X. Yang3, M. Ye1, M. H. Ye2, Y. X. Ye17, L. H. Yi7, Z. Y. Yi1, C. S. Yu1, G. W. Yu1, C. Z. Yuan1, J. M. Yuan1, Y. Yuan1, S. L. Zang1, Y. Zeng7, Yu Zeng1, B. X. Zhang1, B. Y. Zhang1, C. C. Zhang1, D. H. Zhang1, H. Y. Zhang1, J. Zhang1, J. W. Zhang1, J. Y. Zhang1, Q. J. Zhang1, S. Q. Zhang1, X. M. Zhang1, X. Y. Zhang12, Y. Y. Zhang1, Yiyun Zhang14, Z. P. Zhang17, Z. Q. Zhang5, D. X. Zhao1, J. B. Zhao1, J. W. Zhao1, M. G. Zhao10, P. P. Zhao1, W. R. Zhao1, X. J. Zhao1, Y. B. Zhao1, Z. G. Zhao1,**, H. Q. Zheng11, J. P. Zheng1, L. S. Zheng1, Z. P. Zheng1, X. C. Zhong1, B. Q. Zhou1, G. M. Zhou1, L. Zhou1, N. F. Zhou1, K. J. Zhu1, Q. M. Zhu1, Y. C. Zhu1, Y. S. Zhu1, Yingchun Zhu1,††, Z. A. Zhu1, B. A. Zhuang1, X. A. Zhuang1, and B. S. Zou1 (BES Collaboration)
1Institute of High Energy Physics, Beijing 100049, People’s Republic of China
2China Center for Advanced Science and Technology (CCAST), Beijing 100080, People’s Republic of China
3Guangxi Normal University, Guilin 541004, People’s Republic of China
4Guangxi University, Nanning 530004, People’s Republic of China
5Henan Normal University, Xinxiang 453002, People’s Republic of China
6Huazhong Normal University, Wuhan 430079, People’s Republic of China
7Hunan University, Changsha 410082, People’s Republic of China
8Liaoning University, Shenyang 110036, People’s Republic of China
9Nanjing Normal University, Nanjing 210097, People’s Republic of China
10Nankai University, Tianjin 300071, People’s Republic of China
11Peking University, Beijing 100871, People’s Republic of China
12Shandong University, Jinan 250100, People’s Republic of China
13Shanghai Jiaotong University, Shanghai 200030, People’s Republic of China
14Sichuan University, Chengdu 610064, People’s Republic of China
15Tsinghua University, Beijing 100084, People’s Republic of China
16University of Hawaii, Honolulu, Hawaii 96822, USA
17University of Science and Technology of China, Hefei 230026, People’s Republic of China
18Wuhan University, Wuhan 430072, People’s Republic of China
19Zhejiang University, Hangzhou 310028, People’s Republic of China
Received 1 March 2005; published 15 April 2005
The processes ψ′→pp̅ π0 and ψ′→pp̅ η are studied using a sample of 14×106 ψ′ decays collected with the Beijing Spectrometer at the Beijing Electron-Positron Collider. The branching fraction of ψ′→pp̅ π0 is measured with improved precision as (13.2±1.0±1.5)×10-5, and ψ′→pp̅ η is observed for the first time with a branching fraction of (5.8±1.1±0.7)×10-5, where the first errors are statistical and the second ones are systematic.
© 2005 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevD.71.072006
DOI:
10.1103/PhysRevD.71.072006
PACS:
13.25.Gv, 12.38.Qk, 14.40.Cs, 14.20.Gk
*Current address: Iowa State University, Ames, IA 50011-3160, USA. †Current address: Purdue University, West Lafayette, IN 47907, USA. ‡Current address: Cornell University, Ithaca, NY 14853, USA. §Current address: Laboratoire de l’Accélératéar Linéaire, F-91898 Orsay, France. **Current address: University of Michigan, Ann Arbor, MI 48109, USA. ††Current address: DESY, D-22607, Hamburg, Germany.
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