Observation of a Charged Charmoniumlike Structure in e+e- → (D* (D)over-bar*)±π∓ at √s=4.26 GeV

被引：253

作者：

Ablikim, M. ^{[1
]}

Achasov, M. N. ^{[7
,54
]}

Albayrak, O. ^{[4
]}

Ambrose, D. J. ^{[44
]}

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

An, Q. ^{[45
]}

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

Ferroli, R. Baldini ^{[18
]}

Ban, Y. ^{[29
]}

Becker, J. ^{[3
]}

Bennett, J. V. ^{[17
]}

Bertani, M. ^{[18
]}

Bian, J. M. ^{[43
]}

Boger, E. ^{[22
,55
]}

Bondarenko, O. ^{[23
]}

Boyko, I. ^{[22
]}

Braun, S. ^{[40
]}

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

Bytev, V. ^{[22
]}

Cai, H. ^{[51
]}

Cai, X. ^{[1
]}

Cakir, O. ^{[37
]}

Calcaterra, A. ^{[18
]}

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

Cetin, S. A. ^{[38
]}

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

Chelkov, G. ^{[22
,55
]}

Chen, G. ^{[1
]}

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

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

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

Chen, S. J. ^{[27
]}

Chen, X. R. ^{[24
]}

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

Cheng, H. P. ^{[15
]}

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

Cronin-Hennessy, D. ^{[43
]}

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

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

Dedovich, D. ^{[22
]}

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

Denig, A. ^{[21
]}

Denysenko, I. ^{[22
]}

Destefanis, M. ^{[48
,50
]}

Ding, W. M. ^{[31
]}

Ding, Y. ^{[25
]}

Dong, L. Y. ^{[1
]}

Dong, M. Y. ^{[1
]}

Du, S. X. ^{[53
]}

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

[8] GSI Helmholtzctr Heavy Ion Res GmbH, D-64291 Darmstadt, Germany

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

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

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

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

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

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

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

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

[17] Indiana Univ, Bloomington, IN 47405 USA

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

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

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

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

[22] Joint Inst Nucl Res, Dubna 141980, Moscow Region, Russia

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

[42] Univ Hawaii, Honolulu, HI 96822 USA

[43] Univ Minnesota, Minneapolis, MN 55455 USA

[44] Univ Rochester, Rochester, NY 14627 USA

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

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

[47] Univ Punjab, Lahore 54590, Pakistan

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

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

[50] Ist Nazl Fis Nucl, I-10125 Turin, Italy

来源：

PHYSICAL REVIEW LETTERS | 2014年 / 112卷 / 13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：

All Open Access; Green;

D O I：

10.1103/PhysRevLett.112.132001

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We study the process e(+)e(-) -> (D* (D) over bar*)(+/-)pi(-/+) at a center-of-mass energy of 4.26 GeV using a 827 pb(-1) data sample obtained with the BESIII detector at the Beijing Electron Positron Collider. Based on a partial reconstruction technique, the Born cross section is measured to be (137 +/- 9 +/- 15) pb. We observe a structure near the (D* (D) over bar*)(+/-) threshold in the pi(-/+) recoil mass spectrum, which we denote as the Z(c)(+/-) (4025). The measured mass and width of the structure are (4026.3 +/- 2.6 +/- 3.7) MeV/c(2) and (24.8 +/- 5.6 +/- 7.7) MeV, respectively. Its production ratio sigma(e(+)e(-) -> Z(c)(+/-)(4025)pi(-/+)-> (D* (D) over bar*)(+/-)pi(-/+)/sigma(e(+)e(-) -> (D* (D) over bar*)(+/-)pi(-/+) is determined to be 0.65 +/- 0.09 +/- 0.06. The first uncertainties are statistical and the second are systematic.

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