Measurement of e+e- → π+π- ψ(3686) from 4.008 to 4.600 GeV and observation of a charged structure in the π±ψ(3686) mass spectrum

被引:95
作者
Ablikim, M. [1 ]
Achasov, M. N. [9 ,65 ]
Ahmed, S. [14 ]
Ai, X. C. [1 ]
Albayrak, O. [5 ]
Albrecht, M. [4 ]
Ambrose, D. J. [50 ]
Amoroso, A. [55 ,57 ]
An, F. F. [1 ]
An, Q. [52 ]
Bai, J. Z. [1 ]
Bakina, O. [26 ]
Ferroli, R. Baldini [20 ]
Ban, Y. [34 ]
Bennett, D. W. [19 ]
Bennett, J. V. [5 ]
Berger, N. [25 ]
Bertani, M. [20 ]
Bettoni, D. [23 ]
Bian, J. M. [49 ]
Bianchi, F. [55 ,57 ]
Boger, E. [26 ,63 ]
Boyko, I. [26 ]
Briere, R. A. [5 ]
Cai, H. [59 ]
Cai, X. [1 ]
Cakir, O. [43 ]
Calcaterra, A. [20 ]
Cao, G. F. [1 ,47 ]
Cetin, S. A. [44 ]
Chai, J. [57 ]
Chang, J. F. [1 ]
Chelkov, G. [26 ,63 ,64 ]
Chen, G. [1 ]
Chen, H. S. [1 ,47 ]
Chen, J. C. [1 ]
Chen, M. L. [1 ]
Chen, S. [47 ]
Chen, S. J. [32 ]
Chen, X. [1 ]
Chen, X. R. [29 ]
Chen, Y. B. [1 ]
Chu, X. K. [34 ]
Cibinetto, G. [23 ]
Dai, H. L. [1 ]
Dai, J. P. [37 ,69 ,70 ,71 ]
Dbeyssi, A. [14 ]
Dedovich, D. [26 ]
Deng, Z. Y. [1 ]
Denig, A. [25 ]
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, Hubei, Peoples R China
[7] China Ctr Adv Sci & Technol, Beijing 100190, Peoples R China
[8] COMSATS Inst Informat Technol, Def Rd,Off Raiwind Rd, Lahore 54000, Pakistan
[9] GI Budker Inst Nucl Phys SB RAS BINP, Novosibirsk 630090, Russia
[10] GSI Helmholtzctr 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, Johann Joachim Becher Weg 45, 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, Johann Joachim Becher Weg 45, D-55099 Mainz, Germany
[26] Joint Inst Nucl Res, Dubna 141980, Moscow Region, Russia
[27] Justus Liebig Univ Giessen, Inst Phys 2, Heinrich Buff Ring 16, D-35392 Giessen, Germany
[28] Univ Groningen, KVI CART, NL-9747 AA Groningen, Netherlands
[29] Lanzhou Univ, Lanzhou 730000, Gansu, Peoples R China
[30] Liaoning Univ, Shenyang 110036, Liaoning, 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, Shandong, Peoples R China
[37] Shanghai Jiao Tong Univ, Shanghai 200240, Peoples R China
[38] Shanxi Univ, Taiyuan 030006, Shanxi, Peoples R China
[39] Sichuan Univ, Chengdu 610064, Sichuan, 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] Ankara Univ, TR-06100 Ankara, Turkey
[44] Istanbul Bilgi Univ, TR-34060 Istanbul, Turkey
[45] Uludag Univ, TR-16059 Bursa, Turkey
[46] Near East Univ, Nicosia, North Cyprus, Turkey
[47] Chinese Acad Sci, Beijing 100049, Peoples R China
[48] Univ Hawaii, Honolulu, HI 96822 USA
[49] Univ Minnesota, Minneapolis, MN 55455 USA
[50] Univ Rochester, Rochester, NY 14627 USA
基金
新加坡国家研究基金会; 中国国家自然科学基金; 瑞典研究理事会;
关键词
PI-PI; RADIATIVE-CORRECTIONS; CHARMONIUM;
D O I
10.1103/PhysRevD.96.032004
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We study the process e(+)e(-) -> p(+)p(-)psi(3686) using 5.1 fb(-1) of data collected at 16 center-of-mass energy (root s) points from 4.008 to 4.600 GeV by the BESIII detector operating at the BEPCII collider. The measured Born cross sections for e(+)e(-) -> p(+)p(-)psi(3686) are consistent with previous results, but with much improved precision. A fit to the cross section shows contributions from two structures: the first has M = 4209.5 +/- 7.4 +/- 1.4 MeV/c(2) and Gamma = 80.1 +/- 24.6 +/- 2.9 MeV, and the second has M = 4383.8 +/- 4.2 +/- 0.8 MeV/c(2) and Gamma = 84.2 +/- 12.5 +/- 2.1 MeV, where the first errors are statistical and the second systematic. The lower-mass resonance is observed in the process e(+)e(-) -> p(+)p(-)psi(3686) for the first time with a statistical significance of 5.8 sigma. A charged charmoniumlike structure is observed in the pi(+/-)psi(3686) invariant mass spectrum for data at root s = 4.416 GeV. A fit with an S-wave Breit-Wigner function yields a mass M = 4032.1 +/- 2.4 MeV/c(2), where the errors are statistical only. However, there are still unresolved discrepancies between the fit model and data. The width of the intermediate state varies in a wide range for different kinematic regions within the data set. Therefore, no simple interpretation of the data has been found, and a future data sample with larger statistics and more theoretical input will be required to better understand this issue.
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页数:13
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