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Observation of a charged charmoniumlike structure Zc(4020) and search for the Zc(3900) in e+e-+π-hc

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WOS被引频次:175
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成果类型:
期刊论文
作者:
Ablikim, M.*;Achasov, M.N.;Albayrak, O.;Ambrose, D.J.;An, F.F.;An, Q.;Bai, J.Z.;Baldini Ferroli, R.;Ban, Y.;Becker, J.;Bennett, J.V.;Bertani, M.;Bian, J.M.;Boger, E.;Bondarenko, O.;Boyko, I.;Braun, S.;Briere, R.A.;Bytev, V.;Cai, H.;Cai, X.;Cakir, O.;Calcaterra, A.;Cao, G.F.;Cetin, S.A.;Chang, J.F.;Chelkov, G.;Chen, G.;Chen, H.S.;Chen, J.C.;Chen, M.L.;Chen, S.J.;Chen, X.R.;Chen, Y.B.;Cheng, H.P.;Chu, X.K.;Chu, Y.P.;Cronin-Hennessy, D.;Dai, H.L.;Dai, J.P.;Dedovich, D.;Deng, Z.Y.;Denig, A.;Denysenko, I.;Destefanis, M.;Ding, W.M.;Ding, Y.;Dong, L.Y.;Dong, M.Y.;Du, S.X.;Fang, J.;Fang, S.S.;Fava, L.;Feng, C.Q.;Friedel, P.;Fu, C.D.;Fu, J.L.;Fuks, O.;Gao, Y.;Geng, C.;Goetzen, K.;Gong, W.X.;Gradl, W.;Greco, M.;Gu, M.H.;Gu, Y.T.;Guan, Y.H.;Guo, A.Q.;Guo, L.B.;Guo, T.;Guo, Y.P.;Han, Y.L.;Harris, F.A.;He, K.L.;He, M.;He, Z.Y.;Held, T.;Heng, Y.K.;Hou, Z.L.;Hu, C.;Hu, H.M.;Hu, J.F.;Hu, T.;Huang, G.M.;Huang, G.S.;Huang, J.S.;Huang, L.;Huang, X.T.;Huang, Y.;Hussain, T.;Ji, C.S.;Ji, Q.;Ji, Q.P.;Ji, X.B.;Ji, X.L.;Jiang, L.L.;Jiang, X.S.;Jiao, J.B.;Jiao, Z.;Jin, D.P.;Jin, S.;Jing, F.F.;Kalantar-Nayestanaki, N.;Kavatsyuk, M.;Kloss, B.;Kopf, B.;Kornicer, M.;Kuehn, W.;Lai, W.;Lange, J.S.;Lara, M.;Larin, P.;Leyhe, M.;Li, C.H.;Li, Cui;Li, D.L.;Li, D.M.;Li, F.;Li, G.;Li, H.B.;Li, J.C.;Li, K.;Li, Lei;Li, N.;Li, P.R.;Li, Q.J.;Li, W.D.;Li, W.G.;Li, X.L.;Li, X.N.;Li, X.Q.;Li, X.R.;Li, Z.B.;Liang, H.;Liang, Y.F.;Liang, Y.T.;Liao, G.R.;Lin, D.X.;Liu, B.J.;Liu, C.L.;Liu, C.X.;Liu, F.H.;Liu, Fang;Liu, Feng;Liu, H.B.;Liu, H.H.;Liu, H.M.;Liu, J.P.;Liu, K.;Liu, K.Y.;Liu, P.L.;Liu, Q.;Liu, S.B.;Liu, X.;Liu, Y.B.;Liu, Z.A.;Liu, Zhiqiang;Liu, Zhiqing;Loehner, H.;Lou, X.C.;Lu, G.R.;Lu, H.J.;Lu, J.G.;Lu, X.R.;Lu, Y.P.;Luo, C.L.;Luo, M.X.;Luo, T.;Luo, X.L.;Lv, M.;Ma, F.C.;Ma, H.L.;Ma, Q.M.;Ma, S.;Ma, T.;Ma, X.Y.;Maas, F.E.;Maggiora, M.;Malik, Q.A.;Mao, Y.J.;Mao, Z.P.;Messchendorp, J.G.;Min, J.;Min, T.J.;Mitchell, R.E.;Mo, X.H.;Moeini, H.;Morales Morales, C.;Moriya, K.
通讯作者:
Ablikim, M.
作者机构:
[Thorndike, E. H.; Ma, T. ; Ambrose, D.J. ] Univ Rochester, Rochester, NY 14627 USA.
[Peters, K.; Goetzen, K. ] GSI Helmholtzctr Heavy Ion Res GmbH, D-64291 Darmstadt, Germany.
[ Bai, J.Z. ; Li, W.D. ; Dai, H.L. ; Qin, X. S.; Zhu, K.; Liu, C.X. ; Han, Y.L. ; Ablikim, M. ; Chen, J.C. ; Zhao, J. W.; Qiu, J. F.; Ping, R. G.; Cheng, H.P. ; Zhang, J. Z.; Li, G.; Qin, Z. H.; Yang, H. X.; Tang, X.; Jiang, X.S. ; Wang, L. S.; Zhang, J. Y.; Li, F. ; Zhang, S. H.; Liu, Zhiqing; Li, J.C. ; Zhuang, J.; Li, H.B. ; Ji, X.L. ; Luo, X.L. ; Chu, Y. P.; Wu, Z.; Wang, B.; Zhao, G.; Wang, P. L.; Dai, J.P. ; Gong, W.X. ; Hu, H.M. ; Ma, X.Y. ; Dong, L.Y. ; Lu, Y.P. ; Gu, M.H. ; Jin, S. ; Zhang, B. Y.; Li, X.N. ; Zhu, Y. S.; Zheng, J. P.; Shen, X. Y.; Huang, L. ; Zhao, Y. B.; Fang, J. ; Wu, L. H.; Zhou, L.; Mo, X.H. ; Cao, G.F. ; Li, W.G. ; Lai, W. ; Zhang, X. J.; Zhang, B. X.; Jiang, L.L. ; Wang, Z. G.; Zou, J. H.; Lou, X.C. ; Zhang, Y.; Fu, C.D. ; Sun, S. S.; Ye, H.; An, F.F. ; Wang, Q. J.; Zhang, Y. H.; Kuehn, W. ; Lv, M. ; Cai, X. ; Liu, Zhiqiang ; Zhao, T. C.; Wang, Z. Y.; Chang, J.F. ; Fang, S.S. ; Dong, M.Y. ; Ma, Q.M. ; Deng, Z.Y. ; Wang, P.; Qian, S.; Zhang, J. Q.; Calcaterra, A. ; Ji, X.B. ; Zou, B. S.; Achasov, M.N. ; An, Q. ; Xie, Y. G.; Ye, M.; Liu, Q. ; Jin, D.P. ; Wang, L. L.; Ma, H.L. ; Ji, Q. ; Liu, H.M. ; Zhu, K. J.; Wang, Y. F.; Min, J. ; Liu, B.J. ; Sun, Y. Z.; Li, Lei ; Rong, G.; Hou, Z.L. ; Zhang, J. W.; Li, Q.J. ; Heng, Y.K. ; Wang, K.; Xu, G. F.; Zhu, Z. A.; Yang, Y. Z.; Kavatsyuk, M. ; He, M. ; Zhao, Ling; Zhang, H. Y.; Bian, J.M. ; Li, C.H. ; Zhang, D. H.; Sun, G. X.; Wen, S. P.; Zhang, C. C.; Ning, Z.; Xue, Z.; Sun, Z. J.; Liu, Fang ; Wang, Z.; Hussain, T. ; Leyhe, M. ; Chen, Y.B. ; Li, G. ; Lu, J.G. ; Zhao, Q.; Mao, Z.P. ; Yu, B. X.] Inst High Energy Phys, Beijing 100049, Peoples R China.
[Zafar, A. A.; Malik, Q.A. ; Hu, T. ; Rashid, K. H.] Univ Punjab, Lahore 54590, Pakistan.
[Xia, L. G.; Zhu, X. L.; Liao, G.R. ; Jing, F.F. ; Li, K. ; Wang, X. F.; Gao, Y. ] Tsinghua Univ, Beijing 100084, Peoples R China.
通讯机构:
[Ablikim, M] Inst High Energy Phys, Beijing 100049, Peoples R China.
语种:
英文
关键词:
Beijing Electron Positron Collider - Center-of-mass energies - Data sample - Final state - Invariant-mass spectra - Mass spectra - Production cross section - Upper limits
期刊:
Physical Review Letters
ISSN:
0031-9007
年:
2013
卷:
111
期:
24
文献类别:
WOS:Article;EI:Journal article (JA)
所属学科:
ESI学科类别:物理学;WOS学科类别:Physics, Multidisciplinary
入藏号:
WOS:000328699400004;EI:20135117113671
基金类别:
Ministry of Science and Technology of China [2009CB825200]; National Natural Science Foundation of China (NSFC) [10625524, 10821063, 10825524, 10835001, 10935007, 11125525, 11235011]; National Natural Science Foundation of China [11079008, 11079023, 11179007, U1332201]; Chinese Academy of Sciences (CAS) Large-Scale Scientific Facility Program; CAS [KJCX2-YW-N29, KJCX2-YW-N45]; 100 Talents Program of CAS; German Research Foundation DFG under Collaborative Research Center [CRC-1044]; Istituto Nazionale di Fisica Nucleare, Italy; Ministry of Development of Turkey [DPT2006K-120470]; U.S. Department of Energy [DE-FG02-04ER41291, DE-FG02-05ER41374, DE-FG02-94ER40823]; U.S. National Science Foundation; University of Groningen (RuG); Helmholtzzentrum fuer SchwerionenforschungGmbH (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:
We study e<sup>+</sup>e<sup>-</sup>&rarr&pi;<sup>+</sup>&pi;<sup>-</sup>h<inf>c</inf> at center-of-mass energies from 3.90 to 4.42 GeV by using data samples collected with the BESIII detector operating at the Beijing Electron Positron Collider. The Born cross sections are measured at 13 energies and are found to be of the same order of magnitude as those of e <sup>+</sup>e<sup>-</sup>&rarr&pi;<sup>+</sup>&pi;<sup>-</sup>J/&psi;but with a different line shape. In the &pi;<sup>&plusmn;</sup>h<inf>c</inf> mass spectrum, a distinct structure, referred to as Z<inf>c</inf>(4020), is observed at 4.02 GeV/c2. The Z<inf>c</inf>(4020) carries an electric charge and couples to charmonium. A fit to the &pi;<sup>&plusmn;</sup>h<inf>c</inf> invariant mass spectrum, neglecting possible interferences, results in a mass of (4022.9&plusmn;0.8&plusmn;2.7) MeV/c2 and a width of (7.9&plusmn;2.7&plusmn;2.6) MeV for the Z<inf>c</inf>(4020), where the first errors are statistical and the second systematic. The difference between the parameters of this structure and the Z<inf>c</inf>(4025) observed in the D<sup>*</sup>D <sup>&macr;</sup>* final state is within 1.5&sigma;, but whether they are the same state needs further investigation. No significant Z<inf>c</inf>(3900) signal is observed, and upper limits on the Z<inf>c</inf>(3900) production cross sections in &pi;<sup>&plusmn;</sup>h<inf>c</inf> at center-of-mass energies of 4.23 and 4.26 GeV are set. &copy;2013 American Physical Society.
参考文献:
Abakumova EV, 2011, NUCL INSTRUM METH A, V659, P21, DOI 10.1016/j.nima.2011.08.050
Ablikim M, 2013, PHYS REV D, V87, DOI 10.1103/PhysRevD.87.012002
Ablikim M, 2012, PHYS REV D, V86, DOI 10.1103/PhysRevD.86.092009
Ablikim M, 2013, PHYS REV LETT, V110, DOI 10.1103/PhysRevLett.110.252001
Ablikim M, 2010, PHYS REV LETT, V104, DOI 10.1103/PhysRevLett.104.132002

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