Observation of electromagnetic Dalitz decays J/ψ → Pe+e-

被引：20

作者：

Ablikim, M. ^{[1
]}

Achasov, M. N. ^{[8
,56
]}

Ai, X. C. ^{[1
]}

Albayrak, O. ^{[4
]}

Albrecht, M. ^{[3
]}

Ambrose, D. J. ^{[45
]}

An, F. F. ^{[1
]}

An, Q. ^{[46
]}

Bai, J. Z. ^{[1
]}

Ferroli, R. Baldini ^{[19
]}

Ban, Y. ^{[30
]}

Bennett, J. V. ^{[18
]}

Bertani, M. ^{[19
]}

Bian, J. M. ^{[44
]}

Boger, E. ^{[23
]}

Bondarenko, O. ^{[24
]}

Boyko, I. ^{[23
]}

Braun, S. ^{[41
]}

Briere, R. A. ^{[4
]}

Cai, H. ^{[53
]}

Cai, X. ^{[1
]}

Cakir, O. ^{[38
]}

Calcaterra, A. ^{[19
]}

Cao, G. F. ^{[1
]}

Cetin, S. A. ^{[39
]}

Chang, J. F. ^{[1
]}

Chelkov, G. ^{[23
,57
]}

Chen, G. ^{[1
]}

Chen, H. S. ^{[1
]}

Chen, J. C. ^{[1
]}

Chen, M. L. ^{[1
]}

Chen, S. J. ^{[28
]}

Chen, X. ^{[1
]}

Chen, X. R. ^{[25
]}

Chen, Y. B. ^{[1
]}

Cheng, H. P. ^{[16
]}

Chu, X. K. ^{[30
]}

Chu, Y. P. ^{[1
]}

Cronin-Hennessy, D. ^{[44
]}

Dai, H. L. ^{[1
]}

Dai, J. P. ^{[1
]}

Dedovich, D. ^{[23
]}

Deng, Z. Y. ^{[1
]}

Denig, A. ^{[22
]}

Denysenko, I. ^{[23
]}

Destefanis, M. ^{[51
]}

Ding, W. M. ^{[32
]}

Ding, Y. ^{[26
]}

Dong, C. ^{[29
]}

Dong, J. ^{[1
]}

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, Pakistan

[8] GI Budker Inst Nucl Phys SB RAS BINP, Novosibirsk 630090, Russia

[9] GSI 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] Johannes Gutenberg Univ Mainz, D-55099 Mainz, Germany

[23] Joint Inst Nucl Res, Dubna 141980, Russia

[24] Univ Groningen, KVI, NL-9747 AA Groningen, Netherlands

[25] Lanzhou Univ, Lanzhou 730000, Peoples R China

[26] Liaoning Univ, Shenyang 110036, Peoples R China

[27] Nanjing Normal Univ, Nanjing 210023, Jiangsu, Peoples R China

[28] Nanjing Univ, Nanjing 210093, Jiangsu, Peoples R China

[29] Nankai Univ, Tianjin 300071, Peoples R China

[30] Peking Univ, Beijing 100871, Peoples R China

[31] Seoul Natl Univ, Seoul 151747, South Korea

[32] Shandong Univ, Jinan 250100, Peoples R China

[33] Shanxi Univ, Taiyuan 030006, Peoples R China

[34] Sichuan Univ, Chengdu 610064, Peoples R China

[35] Soochow Univ, Suzhou 215006, Peoples R China

[36] Sun Yat Sen Univ, Guangzhou 510275, Guangdong, Peoples R China

[37] Tsinghua Univ, Beijing 100084, Peoples R China

[38] Ankara Univ, TR-06100 Ankara, Turkey

[39] Dogus Univ, TR-34722 Istanbul, Turkey

[40] Uludag Univ, TR-16059 Bursa, Turkey

[41] Univ Giessen, D-35392 Giessen, Germany

[42] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

[43] Univ Hawaii, Honolulu, HI 96822 USA

[44] Univ Minnesota, Minneapolis, MN 55455 USA

[45] Univ Rochester, Rochester, NY 14627 USA

[46] Univ Sci & Technol China, Hefei 230026, Peoples R China

[47] Univ South China, Hengyang 421001, Peoples R China

[48] Univ Punjab, Lahore 54590, Pakistan

[49] Univ Turin, I-10125 Turin, Italy

[50] Univ Piemonte Orientale, I-15121 Alessandria, Italy

来源：

PHYSICAL REVIEW D | 2014年 / 89卷 / 09期

基金：

中国国家自然科学基金; 美国国家科学基金会; 新加坡国家研究基金会;

关键词：

TRANSITION FORM-FACTORS; OMEGA; MESON; PAIR; PHI;

D O I：

10.1103/PhysRevD.89.092008

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Based on a sample of (225.3 +/- 2.8) x 10(6) J/psi events collected with the BESIII detector, the electromagnetic Dalitz decays of J/psi -> Pe(+)e(-)(P = eta'/eta/pi(0)) are studied. By reconstructing the pseudoscalar mesons in various decay modes, the decays J/psi -> eta'e(+)e(-), J/psi -> eta e(+)e(-), and J/psi -> pi(0)e(+)e(-) are observed for the first time. The branching fractions are determined to be B(J/psi -> eta'e(+)e(-)) = (5.81 +/- 0.16 +/- 0.31) x 10(-5), B(J/psi -> eta e(+)e(-)) = (1.16 +/- 0.07 +/- 0.06) x 10(-5), and B(J/psi -> pi(0)e(+)e(-)) = (7.56 +/- 1.32 +/- 0.50) x 10(-7), where the first errors are statistical and the second ones systematic.

引用

页数：10

共 34 条

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