Measurement of the proton form factor by studying e+e- → p(p)over-tilde

被引：76

作者：

Ablikim, M. ^{[1
,60
]}

Achasov, M. N. ^{[9
]}

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

Albayrak, O. ^{[5
]}

Albrecht, M. ^{[4
]}

Ambrose, D. J. ^{[49
,55
]}

Amoroso, A. ^{[53
]}

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

An, Q. ^{[50
]}

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

Ferroli, R. Baldini ^{[20
,21
]}

Ban, Y. ^{[34
]}

Bennett, D. W. ^{[19
]}

Bennett, J. V. ^{[5
]}

Bertani, M. ^{[20
,21
]}

Bettoni, D.

Bian, J. M. ^{[48
,55
]}

Bianchi, F. ^{[53
,62
]}

Boger, E. ^{[26
]}

Bondarenko, O. ^{[28
]}

Boyko, I. ^{[26
]}

Briere, R. A. ^{[5
]}

Cai, H. ^{[57
]}

Cai, X. ^{[1
,61
]}

Cakir, O. ^{[43
]}

Calcaterra, A. ^{[20
,21
]}

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

Cetin, S. A. ^{[44
]}

Chang, J. F. ^{[1
,62
]}

Chelkov, G. ^{[26
]}

Chen, G. ^{[1
]}

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

Chen, H. Y. ^{[2
]}

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

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

Chen, S. J. ^{[32
]}

Chen, X. ^{[1
]}

Chen, X. R. ^{[29
]}

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

Cheng, H. P. ^{[17
]}

Chu, X. K. ^{[34
]}

Cibinetto, G. ^{[23
]}

Cronin-Hennessy, D. ^{[48
]}

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

Dai, J. P. ^{[37
]}

Dbeyssi, A. ^{[14
]}

Dedovich, D. ^{[26
]}

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

Denig, A. ^{[25
]}

Denysenko, I. ^{[26
,55
]}

机构：

[1] Inst High Energy Phys, Beijing 100049, Peoples R China

[2] Beihang Univ, Beijing 100191, Peoples R China

[3] Beijing Inst Petrochem Technol, Beijing 102617, Peoples R China

[4] Ruhr Univ Bochum, D-44780 Bochum, Germany

[5] Carnegie Mellon Univ, Pittsburgh, PA 15213 USA

[6] Cent China Normal Univ, Wuhan 430079, Peoples R China

[7] China Ctr Adv Sci & Technol, Beijing 100190, Peoples R China

[8] COMSATS Inst Informat Technol, Lahore 54000, Pakistan

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

[10] GSI Helmholtzcentre Heavy Ion Res GmbH, D-64291 Darmstadt, Germany

[11] Guangxi Normal Univ, Guilin 541004, Peoples R China

[12] Guangxi Univ, Nanning 530004, Peoples R China

[13] Hangzhou Normal Univ, Hangzhou 310036, Zhejiang, Peoples R China

[14] Helmholtz Inst Mainz, D-55099 Mainz, Germany

[15] Henan Normal Univ, Xinxiang 453007, Peoples R China

[16] Henan Univ Sci & Technol, Luoyang 471003, Peoples R China

[17] Huangshan Coll, Huangshan 245000, Peoples R China

[18] Hunan Univ, Changsha 410082, Hunan, Peoples R China

[19] Indiana Univ, Bloomington, IN 47405 USA

[20] Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy

[21] Ist Nazl Fis Nucl, I-06100 Perugia, Italy

[22] Univ Perugia, I-06100 Perugia, Italy

[23] Ist Nazl Fis Nucl, Sez Ferrara, I-44122 Ferrara, Italy

[24] Univ Ferrara, I-44122 Ferrara, Italy

[25] Johannes Gutenberg Univ Mainz, D-55099 Mainz, Germany

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

[27] Univ Giessen, Inst Phys 2, D-35392 Giessen, Germany

[28] Univ Groningen, KVI CART, NL-9747 AA Groningen, Netherlands

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

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

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

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

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

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

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

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

[37] Jiao Tong Univ, Shanghai 200240, Peoples R China

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

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

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

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

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

[43] Istanbul Aydin Univ, TR-34295 Istanbul, Turkey

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

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

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

[47] Univ Hawaii, Honolulu, HI 96822 USA

[48] Univ Minnesota, Minneapolis, MN 55455 USA

[49] Univ Rochester, Rochester, NY 14627 USA

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

来源：

PHYSICAL REVIEW D | 2015年 / 91卷 / 11期

基金：

俄罗斯基础研究基金会; 新加坡国家研究基金会; 中国国家自然科学基金; 美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevD.91.112004

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Using data samples collected with the BESIII detector at the BEPCII collider, we measure the Born cross section of e(+)e(-) -> p (p) over tilde at 12 center-of-mass energies from 2232.4 to 3671.0 MeV. The corresponding effective electromagnetic form factor of the proton is deduced under the assumption that the electric and magnetic form factors are equal (vertical bar G(E)vertical bar = vertical bar G(M)vertical bar). In addition, the ratio of electric to magnetic form factors, vertical bar G(E)/G(M)vertical bar, and vertical bar G(M)vertical bar are extracted by fitting the polar angle distribution of the proton for the data samples with larger statistics, namely at root s = 2232.4 and 2400.0 MeV and a combined sample at root s = 3050.0, 3060.0 and 3080.0 MeV, respectively. The measured cross sections are in agreement with recent results from BABAR, improving the overall uncertainty by about 30%. The vertical bar G(E)/G(M)vertical bar ratios are close to unity and consistent with BABAR results in the same q(2) region, which indicates the data are consistent with the assumption that vertical bar G(E)vertical bar = vertical bar G(M)vertical bar within uncertainties.

引用

页数：12

共 39 条

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