Observation of J/ψ → p(p)over-bara0(980) at BESIII

被引：7
作者：
Ablikim, M. [1 ]
Achasov, M. N. [8 ,58 ]
Ai, X. C. [1 ]
Albayrak, O. [4 ]
Albrecht, M. [3 ]
Ambrose, D. J. [47 ]
An, F. F. [1 ]
An, Q.
Bai, J. Z. [1 ]
Ferroli, R. Baldini [19 ]
Ban, Y. [32 ]
Bennett, D. W. [18 ]
Bennett, J. V. [18 ]
Bertani, M. [19 ]
Bettoni, D. [22 ]
Bian, J. M. [46 ]
Bianchi, F. [51 ,53 ]
Boger, E. [25 ,63 ]
Bondarenko, O. [26 ]
Boyko, I. [25 ]
Braun, S. [43 ]
Briere, R. A. [4 ]
Cai, H. [55 ]
Cai, X. [1 ]
Cakir, O. [40 ]
Calcaterra, A. [19 ]
Cao, G. F. [1 ]
Cetin, S. A. [41 ]
Chang, J. F. [1 ]
Chelkov, G. [25 ,59 ,60 ]
Chen, G. [1 ]
Chen, H. S. [1 ]
Chen, J. C. [1 ]
Chen, M. L. [1 ]
Chen, S. J. [30 ]
Chen, X. [1 ]
Chen, X. R. [27 ]
Chen, Y. B. [1 ]
Cheng, H. P. [16 ]
Chu, X. K. [32 ]
Chu, Y. P. [1 ]
Cibinetto, G. [22 ]
Cronin-Hennessy, D. [46 ]
Dai, H. L. [1 ]
Dai, J. P. [1 ]
Dedovich, D. [25 ]
Deng, Z. Y. [1 ]
Denig, A. [24 ]
Denysenko, I. [25 ]
Destefanis, M. [51 ,53 ]
机构：
[1] Inst High Energy Phys, Beijing 100049, Peoples R China
[2] Beihang Univ, Beijing 100191, Peoples R China
[3] Ruhr Univ Bochum, D-44780 Bochum, Germany
[4] Carnegie Mellon Univ, Pittsburgh, PA 15213 USA
[5] Cent China Normal Univ, Wuhan 430079, Peoples R China
[6] China Ctr Adv Sci & Technol, Beijing 100190, Peoples R China
[7] COMSATS Inst Informat Technol, Lahore 54000, Pakistan
[8] SB RAS, GI Budker Inst Nucl Phys BINP, Novosibirsk 630090, Russia
[9] GSI Darmstadt, Helmholtzctr Heavy Ion Res GmbH, D-64291 Darmstadt, Germany
[10] Guangxi Normal Univ, Guilin 541004, Peoples R China
[11] Guangxi Univ, Nanning 530004, Peoples R China
[12] Hangzhou Normal Univ, Hangzhou 310036, Zhejiang, Peoples R China
[13] Helmholtz Inst Mainz, D-55099 Mainz, Germany
[14] Henan Normal Univ, Xinxiang 453007, Peoples R China
[15] Henan Univ Sci & Technol, Luoyang 471003, Peoples R China
[16] Huangshan Coll, Huangshan 245000, Peoples R China
[17] Hunan Univ, Changsha 410082, Hunan, Peoples R China
[18] Indiana Univ, Bloomington, IN 47405 USA
[19] Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy
[20] Ist Nazl Fis Nucl, I-06100 Perugia, Italy
[21] Univ Perugia, I-06100 Perugia, Italy
[22] Ist Nazl Fis Nucl, Sez Ferrara, I-44122 Ferrara, Italy
[23] Univ Ferrara, I-44122 Ferrara, Italy
[24] Johannes Gutenberg Univ Mainz, D-55099 Mainz, Germany
[25] Joint Inst Nucl Res, Dubna 141980, Russia
[26] Univ Groningen, KVI, NL-9747 AA Groningen, Netherlands
[27] Lanzhou Univ, Lanzhou 730000, Peoples R China
[28] Liaoning Univ, Shenyang 110036, Peoples R China
[29] Nanjing Normal Univ, Nanjing 210023, Jiangsu, Peoples R China
[30] Nanjing Univ, Nanjing 210093, Peoples R China
[31] Nankai Univ, Tianjin 300071, Peoples R China
[32] Peking Univ, Beijing 100871, Peoples R China
[33] Seoul Natl Univ, Seoul 151747, South Korea
[34] Shandong Univ, Jinan 250100, Peoples R China
[35] Shanxi Univ, Taiyuan 030006, Peoples R China
[36] Sichuan Univ, Chengdu 610064, Peoples R China
[37] Soochow Univ, Suzhou 215006, Peoples R China
[38] Sun Yat Sen Univ, Guangzhou 510275, Guangdong, Peoples R China
[39] Tsinghua Univ, Beijing 100084, Peoples R China
[40] Ankara Univ, TR-06100 Ankara, Turkey
[41] Dogus Univ, TR-34722 Istanbul, Turkey
[42] Uludag Univ, TR-16059 Bursa, Turkey
[43] Univ Giessen, D-35392 Giessen, Germany
[44] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
[45] Univ Hawaii, Honolulu, HI 96822 USA
[46] Univ Minnesota, Minneapolis, MN 55455 USA
[47] Univ Rochester, Rochester, NY 14627 USA
[48] Univ Sci & Technol China, Hefei 230026, Peoples R China
[49] Univ South China, Hengyang 421001, Peoples R China
[50] Univ Punjab, Lahore 54590, Pakistan
来源：
PHYSICAL REVIEW D | 2014年 / 90卷 / 05期
基金：
美国国家科学基金会; 新加坡国家研究基金会; 中国国家自然科学基金;
关键词：
D O I：
10.1103/PhysRevD.90.052009
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Using 2.25 x 10(8) J/psi events collected with the BESIII detector at the BEPCII storage rings, we observe for the first time the process J/psi -> p (p) over bara(0)(980) -> pi(0)eta with a significance of 6.5 sigma (3.2 sigma including systematic uncertainties). The product branching fraction of J/psi -> p (p) over bara(0)(980) -> p (p) over bara(0)pi(0)eta is measured to be (6.8 +/- 1.2 +/- 1.3) x 10(-5), where the first error is statistical and the second is systematic. This measurement provides information on the a(0) production near threshold coupling to p (p) over bar and improves the understanding of the dynamics of J/psi decays to four-body processes.
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页数：8
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