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Observation of e+e- →π+π- hc and a Neutral Charmoniumlike Structure Zc(4020)0

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成果类型:
期刊论文
作者:
Ablikim, M.;Achasov, M. N.;Ai, X. C.;Albayrak, O.;Albrecht, M.;...
通讯作者:
Ji, Q. P.
作者机构:
[Yu, B. X.; Mao, Z. P.; Lu, J. G.; Liu, Zhiqiang; Hu, T.; Liu, J.; Wang, Z.; Liu, Fang; Sun, Z. J.; Xue, Z.; Ning, Z.; Zhang, C. C.; Wen, S. P.; Sun, G. X.; Zhang, D. H.; Yuan, C. Z.; Min, J.; Zhang, H. Y.; Ma, T.; Xiao, Z. J.; Zhu, Z. A.; Chen, H. Y.; Xu, G. F.; Heng, Y. K.; Ji, Q.; Zhang, J. W.; Hou, Z. L.; Rong, G.; Sun, Y. Z.; Liu, B. J.; Min, T. J.; Wang, Y. F.; Zhu, K. J.; Liu, H. M.; Li, Q. J.; Ma, H. L.; Wang, L. L.; Jin, D. P.; Xiu, Q. L.; Ye, M.; Xie, Y. G.; Sheng, H. Y.; Lu, Y.; Ouyang, Q.; Kang, X. S.; Song, X. Y.; Ma, S.; Zou, B. S.; Ji, X. B.; Zhang, J. Q.; Qian, S.; Wang, P.; Ma, Q. M.; Fang, S. S.; Wang, Z. Y.; Zhao, T. C.; Zhao, Q. W.; Liu, Z. A.; Lv, M.; Xu, L.; Zhao, Z. G.; Zhang, Y. H.; Wang, Q. J.; Ye, H.; Zhang, Y.; Zou, J. H.; Wang, Z. G.; Jiang, L. L.; Zhang, B. X.; Zhang, X. J.; Lai, W.; Li, W. G.; Niu, X. Y.; Mo, X. H.; Zhou, L.; Wu, L. H.; Zhao, Y. B.; Shen, X. Y.; Zheng, J. P.; Zhu, Y. S.; Li, X. N.; Zhang, B. Y.; Jiang, X. S.; Lu, Y. P.; Ma, X. Y.; Hu, H. M.; Wang, P. L.; Zhao, G.; Yuan, Y.; Wu, Z.; Luo, X. L.; Liang, Y. F.; Kang, X. L.; Ji, X. L.; Li, H. B.; Zhuang, J.; Li, J. C.; Zhang, S. H.; Li, F.; Zhang, J. Y.; Zhou, X. Y.; Wang, L. S.; Jin, S.; Tang, X.; Song, W. M.; Yang, H. X.; Qin, Z. H.; Xiao, D.; Li, G.; Zhang, J. Z.; Ping, R. G.; Qiu, J. F.; Zhao, J. W.; Liu, C. X.; Zhu, K.; Wang, W.; Li, W. D.] Inst High Energy Phys, Beijing 100049, Peoples R China.
[Shen, C. P.] Beihang Univ, Beijing 100191, Peoples R China.
[Albrecht, M.; Leyhe, M.; Wiedner, U.; Pelizaeus, M.; Kopf, B.; Held, T.] Ruhr Univ Bochum, D-44780 Bochum, Germany.
[Briere, R. A.; Liu, C. L.; Albayrak, O.] Carnegie Mellon Univ, Pittsburgh, PA 15213 USA.
[Yang, Y.; Zhang, Z. H.; Liu, Feng; Huang, G. M.; Mo, Y. J.] Cent China Normal Univ, Wuhan 430079, Peoples R China.
通讯机构:
[Ji, Q. P.] N
Nankai Univ, Tianjin 300071, Peoples R China.
语种:
英文
期刊:
PHYSICAL REVIEW LETTERS
ISSN:
0031-9007
年:
2014
卷:
113
期:
21
页码:
212002
基金类别:
National Key Basic Research Program of ChinaNational Basic Research Program of China [2015CB856700]; Joint Funds of the National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [11079008, 11179007, U1232201, U1332201]; National Natural Science Foundation of China (NSFC)National Natural Science Foundation of China (NSFC) [10935007, 11121092, 11125525, 11235011, 11079023, 11322544, 11335008]; Chinese Academy of Sciences (CAS) Large-Scale Scientific Facility ProgramChinese Academy of Sciences; CASChinese Academy of Sciences [KJCX2-YW-N29, KJCX2-YW-N45]; 100 Talents Program of CASChinese Academy of Sciences; German Research Foundation DFGGerman Research Foundation (DFG) [Collaborative Research Center CRC-1044]; Istituto Nazionale di Fisica Nucleare, ItalyIstituto Nazionale di Fisica Nucleare (INFN); Ministry of Development of TurkeyTurkiye Cumhuriyeti Kalkinma Bakanligi [DPT2006K-120470]; Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR) [14-07-91152]; U.S. Department of EnergyUnited States Department of Energy (DOE) [DE-FG02-04ER41291, DE-FG02-05ER41374, DE-FG02-94ER40823, DESC0010118]; U.S. National Science FoundationNational Science Foundation (NSF); University of Groningen (RuG); Helmholtzzentrum fuer Schwerionenforschung GmbH (GSI), Darmstadt; WCU Program of National Research Foundation of Korea [R32-2008-000-10155-0]
机构署名:
本校为其他机构
摘要:
Using data collected with the BESIII detector operating at the Beijing Electron Positron Collider at center-of-mass energies of √s = 4.23, 4.26, and 4.36 GeV, we observe e+e- → π+π-hc for the first time. The Born cross sections are measured and found to be about half of those of e+e-→ π+π-hcwithin less than 2σ. In the π0hc mass spectrum, a structure at 4.02 GeV/c2 is found. It is most likely to be the neutral isospin partner of the Zc(4020)± observed in the process of e+e- → π+π-hc being found. A fit to the π0hc invariant mass spe...

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