Study of e+e- → π+π-π0ηc and evidence for Zc (3900)± decaying into ρ±ηc

被引：12
作者：
Ablikim, M. [1 ]
Achasov, M. N. [10 ,73 ]
Adlarson, P. [65 ]
Ahmed, S. [15 ]
Albrecht, M. [4 ]
Alekseev, M. [63 ,64 ]
Amoroso, A. [63 ,64 ]
An, F. F. [1 ]
An, Q. [46 ,47 ,60 ]
Bai, Y. [45 ]
Bakina, O. [30 ]
Ferroli, R. Baldini [23 ]
Ban, Y. [38 ]
Begzsuren, K. [28 ]
Bennett, J. V. [5 ]
Berger, N. [29 ]
Bertani, M. [23 ]
Bettoni, D. [26 ]
Bianchi, F. [63 ,64 ]
Biernat, J. [65 ]
Bloms, J. [57 ]
Boyko, I. [30 ]
Briere, R. A. [5 ]
Cai, H. [66 ]
Cai, X. [1 ,46 ,47 ]
Calcaterra, A. [23 ]
Cao, G. F. [1 ,52 ]
Cao, N. [1 ,52 ]
Cetin, S. A. [50 ]
Chai, J. [64 ]
Chang, J. F. [1 ,46 ,47 ]
Chang, W. L. [1 ,52 ]
Chelkov, G. [30 ,71 ,72 ]
Chen, D. Y. [6 ]
Chen, G. [1 ]
Chen, H. S. [1 ,52 ]
Chen, J. C. [1 ]
Chen, M. L. [1 ,46 ,47 ]
Chen, S. J. [36 ]
Chen, Y. B. [1 ,46 ,47 ]
Cheng, W. [64 ]
Cibinetto, G. [26 ]
Cossio, F. [64 ]
Cui, X. F. [37 ]
Dai, H. L. [1 ,46 ,47 ]
Dai, J. P. [41 ,77 ,78 ,79 ]
Dai, X. C. [1 ,52 ]
Dbeyssi, A. [15 ]
Dedovich, D. [30 ]
Deng, Z. Y. [1 ]
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] Bochum Ruhr Univ, 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 Univ Islamabad, Lahore Campus,Def Rd,Raiwind Rd, Lahore 54000, Pakistan
[9] Fudan Univ, Shanghai 200443, Peoples R China
[10] RAS, BINP, GI Budker Inst Nucl Phys SB, Novosibirsk 630090, Russia
[11] GSI Helmholtzctr Heavy Ion Res GmbH, D-64291 Darmstadt, Germany
[12] Guangxi Normal Univ, Guilin 541004, Peoples R China
[13] Guangxi Univ, Nanning 530004, Peoples R China
[14] Hangzhou Normal Univ, Hangzhou 310036, Zhejiang, Peoples R China
[15] Helmholtz Inst Mainz, Johann Joachim Becher Weg 45, D-55099 Mainz, Germany
[16] Henan Normal Univ, Xinxiang 453007, Henan, Peoples R China
[17] Henan Univ Sci & Technol, Luoyang 471003, Peoples R China
[18] Huangshan Coll, Huangshan 245000, Peoples R China
[19] Hunan Normal Univ, Changsha 410081, Hunan, Peoples R China
[20] Hunan Univ, Changsha 410082, Hunan, Peoples R China
[21] Indian Inst Technol Madras, Chennai 600036, Tamil Nadu, India
[22] Indiana Univ, Bloomington, IN 47405 USA
[23] INFN, Lab Nazl Frascati, I-00044 Frascati, Italy
[24] INFN, I-06100 Perugia, Italy
[25] Univ Perugia, I-06100 Perugia, Italy
[26] INFN, Sez Ferrara, I-44122 Ferrara, Italy
[27] Univ Ferrara, I-44122 Ferrara, Italy
[28] Inst Phys & Technol, Peace Ave 54B, Ulaanbaatar 13330, Mongolia
[29] Johannes Gutenberg Univ Mainz, Johann Joachim Becher Weg 45, D-55099 Mainz, Germany
[30] Joint Inst Nucl Res, Dubna 141980, Moscow Region, Russia
[31] Justus Liebig Univ Giessen, Phys Inst 2, Heinrich Buff Ring 16, D-35392 Giessen, Germany
[32] Univ Groningen, KVI CART, NL-9747 AA Groningen, Netherlands
[33] Lanzhou Univ, Lanzhou 730000, Gansu, Peoples R China
[34] Liaoning Univ, Shenyang 110036, Liaoning, Peoples R China
[35] Nanjing Normal Univ, Nanjing 210023, Jiangsu, Peoples R China
[36] Nanjing Univ, Nanjing 210093, Jiangsu, Peoples R China
[37] Nankai Univ, Tianjin 300071, Peoples R China
[38] Peking Univ, Beijing 100871, Peoples R China
[39] Shandong Normal Univ, Jinan 250014, Shandong, Peoples R China
[40] Shandong Univ, Jinan 250100, Shandong, Peoples R China
[41] Shanghai Jiao Tong Univ, Shanghai 200240, Peoples R China
[42] Shanxi Univ, Taiyuan 030006, Shanxi, Peoples R China
[43] Sichuan Univ, Chengdu 610064, Sichuan, Peoples R China
[44] Soochow Univ, Suzhou 215006, Peoples R China
[45] Southeast Univ, Nanjing 211100, Jiangsu, Peoples R China
[46] State Key Lab Particle Detect & Elect, Beijing 100049, Peoples R China
[47] State Key Lab Particle Detect & Elect, Hefei 230026, Anhui, Peoples R China
[48] Sun Yat Sen Univ, Guangzhou 510275, Guangdong, Peoples R China
[49] Tsingliiia Univ, Beijing 100084, Peoples R China
[50] Istanbul Bilgi Univ, TR-34060 Istanbul, Turkey
来源：
PHYSICAL REVIEW D | 2019年 / 100卷 / 11期
基金：
中国国家自然科学基金; 瑞典研究理事会;
关键词：
MONTE-CARLO; STATES;
D O I：
10.1103/PhysRevD.100.111102
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We study the reaction e(+)e(-) -> pi(+)pi(-)pi(0)eta(c) for the first time using data samples collected with the BESIII detector at center-of-mass energies root s = 4.226, 4.258, 4.358, 4.416, and 4.600 GeV. Evidence of this process is found and the Born cross section sigma(B) (e(+)e(-) -> pi(+)pi(-)pi(0)eta(c)), excluding e(+)e(-) -> omega eta(c) and eta eta(c), is measured to be (46(-11)(+12) +/- 10) pb at root s = 4.226 GeV. Evidence for the decay Z(c) (3900)(+/-) -> rho(+/-)eta(c) is reported at root s = 4.226 GeV with a significance of 3.9 sigma, including systematic uncertainties, and the Born cross section times branching fraction sigma(B)(e(+)e(-) -> pi(-/+)Z(c) (3900)(+/-)) x B(Z(c)(3900)(+/-) -> rho(+/-)eta(c)) is measured to be (48 +/- 11 +/- 11) pb, which indicates that e(+) e(-)-> pi(-/+)Z(c) (3900)(+/-) -> pi(-/+)rho(+/-)eta(c) dominates the e(+) e(-) -> pi(+)pi(-)pi(0)eta(c) process. The Z(c)(3900)(+/-)->rho(+/-)eta(c) signal is not significant at the other center-of-mass energies and the corresponding upper limits are determined. In addition, no significant signal is observed in a search for Z(c) (4020)(+/-) -> rho(+/-)eta(c) with the same data samples. The ratios R-Zc(3900) = B(Z(c)(3900)(+/-) -> rho(+/-)eta(c))/B(Z(c)(3900)(+/-) -> pi(+/-)J/psi) and RZ(c(4020)) = B(Z(c)(4020)(+/-) -> rho(+/-)eta(c))/B(Z(c)(4020)(+/-) -> pi(+/-)eta(c)) are obtained and compared with different theoretical interpretations of the Z(c)(3900)(+/-) and Z(c)(4020)(+/-).
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页数：8
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