Abstract
We study the process e+e- → π+π- φ (3686) using 5.1 fb-1 of data collected at 16 center-of-mass energy (√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- → π+π- φ(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=c2 and Λ = 80.1 ± 24.6 ± 2.9 MeV, and the second has M = 4383.8 ± 4.2 ± 0.8 MeV=c2 and F = 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- → π+π- φ(3686) for the first time with a statistical significance of 5.8σ. A charged charmoniumlike structure is observed in the π± φ(3686) invariant mass spectrum for data at √s = 4.416 GeV. A fit with an S-wave Breit-Wigner function yields a mass M = 4032.1 ± 2.4 MeV=c2, 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.
| Original language | English (US) |
|---|---|
| Article number | 032004 |
| Journal | Physical Review D |
| Volume | 96 |
| Issue number | 3 |
| DOIs | |
| State | Published - Aug 1 2017 |
Bibliographical note
Funding Information:The BESIII Collaboration thanks the staff of BEPCII, the IHEP computing center and the supercomputing center of USTC for their strong support. This work is supported in part by National Key Basic Research Program of China under Contract No. 2015CB856700; National Natural Science Foundation of China (NSFC) under Contracts No. 11235011, No. 11335008, No. 11375170, No. 11425524, No. 11475164, No. 11475169, No. 11625523, No. 11605196, No. 11605198, No. 11635010; the Chinese Academy of Sciences (CAS) Large-Scale Scientific Facility Program; the CAS Center for Excellence in Particle Physics (CCEPP); Joint Large-Scale Scientific Facility Funds of the NSFC and CAS under Contracts No. U1332201, No. U1532257, No. U1532258, No. U1532102; CAS under Contracts No. KJCX2-YW-N29, No. KJCX2-YW-N45, No. QYZDJ-SSW-SLH003; 100 Talents Program of CAS; National 1000 Talents Program of China; INPAC and Shanghai Key Laboratory for Particle Physics and Cosmology; German Research Foundation
Funding Information:
DFG under Contracts No. Collaborative Research Center CRC 1044, No. FOR 2359; Istituto Nazionale di Fisica Nucleare, Italy; Joint Large-Scale Scientific Facility Funds of the NSFC and CAS; Koninklijke Nederlandse Akademie van Wetenschappen (KNAW) under Contract No. 530-4CDP03; Ministry of Development of Turkey under Contract No. DPT2006K-120470; National Natural Science Foundation of China (NSFC); National Science and Technology Fund; The Swedish Research Council; U.S. Department of Energy under Contracts No. DE-FG02-05ER41374, No. DE-SC-0010118, No. DE-SC-0010504, No. DE-SC-0012069; University of Groningen (RuG) and the Helmholtzzentrum fuer Schwerionenforschung GmbH (GSI), Darmstadt; WCU Program of National Research Foundation of Korea under Contract No. R32-2008-000-10155-0.
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Measurement of e+e- → π+π- φ (3686) from 4.008 to 4.600 GeV and observation of a charged structure in the π± φ(3686) mass spectrum. / Ablikim, M.; Achasov, M. N.; Ahmed, S.; Ai, X. C.; Albayrak, O.; Albrecht, M.; Ambrose, D. J.; Amoroso, A.; An, F. F.; An, Q.; Bai, J. Z.; Bakina, O.; Baldini Ferroli, R.; Ban, Y.; Bennett, D. W.; Bennett, J. V.; Berger, N.; Bertani, M.; Bettoni, D.; Bian, J. M.; Bianchi, F.; Boger, E.; Boyko, I.; Briere, R. A.; Cai, H.; Cai, X.; Cakir, O.; Calcaterra, A.; Cao, G. F.; Cetin, S. A.; Chai, J.; Chang, J. F.; Chelkov, G.; Chen, G.; Chen, H. S.; Chen, J. C.; Chen, M. L.; Chen, S.; Chen, S. J.; Chen, X.; Chen, X. R.; Chen, Y. B.; Chu, X. K.; Cibinetto, G.; Dai, H. L.; Dai, J. P.; Dbeyssi, A.; Dedovich, D.; Deng, Z. Y.; Denig, A.; Denysenko, I.; Destefanis, M.; De Mori, F.; Ding, Y.; Dong, C.; Dong, J.; Dong, L. Y.; Dong, M. Y.; Dou, Z. L.; Du, S. X.; Duan, P. F.; Fan, J. Z.; Fang, J.; Fang, S. S.; Fang, X.; Fang, Y.; Farinelli, R.; Fava, L.; Feldbauer, F.; Felici, G.; Feng, C. Q.; Fioravanti, E.; Fritsch, M.; Fu, C. D.; Gao, Q.; Gao, X. L.; Gao, Y.; Gao, Z.; Garzia, I.; Goetzen, K.; Gong, L.; Gong, W. X.; Gradl, W.; Greco, M.; Gu, M. H.; Gu, Y. T.; Guan, Y. H.; Guo, A. Q.; Guo, L. B.; Guo, R. P.; Guo, Y.; Guo, Y. P.; Haddadi, Z.; Hafner, A.; Han, S.; Hao, X. Q.; Harris, F. A.; He, K. L.; Heinsius, F. H.; Held, T.; Heng, Y. K.; Holtmann, T.; Hou, Z. L.; Hu, C.; Hu, H. M.; Hu, T.; Hu, Y.; Huang, G. S.; Huang, J. S.; Huang, X. T.; Huang, X. Z.; Huang, Z. L.; Hussain, T.; Ikegami Andersson, W.; Ji, Q.; Ji, Q. P.; Ji, X. B.; Ji, X. L.; Jiang, L. W.; Jiang, X. S.; Jiang, X. Y.; Jiao, J. B.; Jiao, Z.; Jin, D. P.; Jin, S.; Johansson, T.; Julin, A.; Kalantar-Nayestanaki, N.; Kang, X. L.; Kang, X. S.; Kavatsyuk, M.; Ke, B. C.; Kiese, P.; Kliemt, R.; Kloss, B.; Kolcu, O. B.; Kopf, B.; Kornicer, M.; Kupsc, A.; Kühn, W.; Lange, J. S.; Lara, M.; Larin, P.; Leithoff, H.; Leng, C.; Li, C.; Li, Cheng; Li, D. M.; Li, F.; Li, F. Y.; Li, G.; Li, H. B.; Li, H. J.; Li, J. C.; Li, Jin; Li, Kang; Li, Ke; Li, Lei; Li, P. R.; Li, Q. Y.; Li, T.; Li, W. D.; Li, W. G.; Li, X. L.; Li, X. N.; Li, X. Q.; Li, Y. B.; Li, Z. B.; Liang, H.; Liang, Y. F.; Liang, Y. T.; Liao, G. R.; Lin, D. X.; Liu, B.; Liu, B. J.; Liu, C. X.; Liu, D.; Liu, F. H.; Liu, Fang; Liu, Feng; Liu, H. B.; Liu, H. M.; Liu, Huanhuan; Liu, Huihui; Liu, J.; Liu, J. B.; Liu, J. P.; Liu, J. Y.; Liu, K.; Liu, K. Y.; Liu, L. D.; Liu, P. L.; Liu, Q.; Liu, S. B.; Liu, X.; Liu, Y. B.; Liu, Y. Y.; Liu, Z. A.; Liu, Zhiqing; Loehner, H.; Long, Y. F.; Lou, X. C.; Lu, H. J.; Lu, J. G.; Lu, Y.; Lu, Y. P.; Luo, C. L.; Luo, M. X.; Luo, T.; Luo, X. L.; Lyu, X. R.; Ma, F. C.; Ma, H. L.; Ma, L. L.; Ma, M. M.; Ma, Q. M.; Ma, T.; Ma, X. N.; Ma, X. Y.; Ma, Y. M.; Maas, F. E.; Maggiora, M.; Malik, Q. A.; Mao, Y. J.; Mao, Z. P.; Marcello, S.; Messchendorp, J. G.; Mezzadri, G.; Min, J.; Min, T. J.; Mitchell, R. E.; Mo, X. H.; Mo, Y. J.; Morales Morales, C.; Muchnoi, N. Yu; Muramatsu, H.; Musiol, P.; Nefedov, Y.; Nerling, F.; Nikolaev, I. B.; Ning, Z.; Nisar, S.; Niu, S. L.; Niu, X. Y.; Olsen, S. L.; Ouyang, Q.; Pacetti, S.; Pan, Y.; Papenbrock, M.; Patteri, P.; Pelizaeus, M.; Peng, H. P.; Peters, K.; Pettersson, J.; Ping, J. L.; Ping, R. G.; Poling, R.; Prasad, V.; Qi, H. R.; Qi, M.; Qian, S.; Qiao, C. F.; Qin, L. Q.; Qin, N.; Qin, X. S.; Qin, Z. H.; Qiu, J. F.; Rashid, K. H.; Redmer, C. F.; Ripka, M.; Rong, G.; Rosner, Ch; Ruan, X. D.; Sarantsev, A.; Savrié, M.; Schnier, C.; Schoenning, K.; Shan, W.; Shao, M.; Shen, C. P.; Shen, P. X.; Shen, X. Y.; Sheng, H. Y.; Song, W. M.; Song, X. Y.; Sosio, S.; Spataro, S.; Sun, G. X.; Sun, J. F.; Sun, S. S.; Sun, X. H.; Sun, Y. J.; Sun, Y. Z.; Sun, Z. J.; Sun, Z. T.; Tang, C. J.; Tang, X.; Tapan, I.; Thorndike, E. H.; Tiemens, M.; Uman, I.; Varner, G. S.; Wang, B.; Wang, B. L.; Wang, D.; Wang, D. Y.; Wang, K.; Wang, L. L.; Wang, L. S.; Wang, M.; Wang, P.; Wang, P. L.; Wang, W.; Wang, W. P.; Wang, X. F.; Wang, Y.; Wang, Y. D.; Wang, Y. F.; Wang, Y. Q.; Wang, Z.; Wang, Z. G.; Wang, Z. H.; Wang, Z. Y.; Wang, Zongyuan; Weber, T.; Wei, D. H.; Weidenkaff, P.; Wen, S. P.; Wiedner, U.; Wolke, M.; Wu, L. H.; Wu, L. J.; Wu, Z.; Xia, L.; Xia, L. G.; Xia, Y.; Xiao, D.; Xiao, H.; Xiao, Z. J.; Xie, Y. G.; Xie, Y. H.; Xiu, Q. L.; Xu, G. F.; Xu, J. J.; Xu, L.; Xu, Q. J.; Xu, Q. N.; Xu, X. P.; Yan, L.; Yan, W. B.; Yan, W. C.; Yan, Y. H.; Yang, H. J.; Yang, H. X.; Yang, L.; Yang, Y. X.; Ye, M.; Ye, M. H.; Yin, J. H.; You, Z. Y.; Yu, B. X.; Yu, C. X.; Yu, J. S.; Yuan, C. Z.; Yuan, Y.; Yuncu, A.; Zafar, A. A.; Zeng, Y.; Zeng, Z.; Zhang, B. X.; Zhang, B. Y.; Zhang, C. C.; Zhang, D. H.; Zhang, H. H.; Zhang, H. Y.; Zhang, J.; Zhang, J. J.; Zhang, J. L.; Zhang, J. Q.; Zhang, J. W.; Zhang, J. Y.; Zhang, J. Z.; Zhang, K.; Zhang, L.; Zhang, S. Q.; Zhang, X. Y.; Zhang, Y. H.; Zhang, Y. N.; Zhang, Y. T.; Zhang, Yang; Zhang, Yao; Zhang, Yu; Zhang, Z. H.; Zhang, Z. P.; Zhang, Z. Y.; Zhao, G.; Zhao, J. W.; Zhao, J. Y.; Zhao, J. Z.; Zhao, Lei; Zhao, Ling; Zhao, M. G.; Zhao, Q.; Zhao, Q. W.; Zhao, S. J.; Zhao, T. C.; Zhao, Y. B.; Zhao, Z. G.; Zhemchugov, A.; Zheng, B.; Zheng, J. P.; Zheng, W. J.; Zheng, Y. H.; Zhong, B.; Zhou, L.; Zhou, X.; Zhou, X. K.; Zhou, X. R.; Zhou, X. Y.; Zhu, K.; Zhu, K. J.; Zhu, S.; Zhu, S. H.; Zhu, X. L.; Zhu, Y. C.; Zhu, Y. S.; Zhu, Z. A.; Zhuang, J.; Zotti, L.; Zou, B. S.; Zou, J. H.
In: Physical Review D, Vol. 96, No. 3, 032004, 01.08.2017.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Measurement of e+e- → π+π- φ (3686) from 4.008 to 4.600 GeV and observation of a charged structure in the π± φ(3686) mass spectrum
AU - Ablikim, M.
AU - Achasov, M. N.
AU - Ahmed, S.
AU - Ai, X. C.
AU - Albayrak, O.
AU - Albrecht, M.
AU - Ambrose, D. J.
AU - Amoroso, A.
AU - An, F. F.
AU - An, Q.
AU - Bai, J. Z.
AU - Bakina, O.
AU - Baldini Ferroli, R.
AU - Ban, Y.
AU - Bennett, D. W.
AU - Bennett, J. V.
AU - Berger, N.
AU - Bertani, M.
AU - Bettoni, D.
AU - Bian, J. M.
AU - Bianchi, F.
AU - Boger, E.
AU - Boyko, I.
AU - Briere, R. A.
AU - Cai, H.
AU - Cai, X.
AU - Cakir, O.
AU - Calcaterra, A.
AU - Cao, G. F.
AU - Cetin, S. A.
AU - Chai, J.
AU - Chang, J. F.
AU - Chelkov, G.
AU - Chen, G.
AU - Chen, H. S.
AU - Chen, J. C.
AU - Chen, M. L.
AU - Chen, S.
AU - Chen, S. J.
AU - Chen, X.
AU - Chen, X. R.
AU - Chen, Y. B.
AU - Chu, X. K.
AU - Cibinetto, G.
AU - Dai, H. L.
AU - Dai, J. P.
AU - Dbeyssi, A.
AU - Dedovich, D.
AU - Deng, Z. Y.
AU - Denig, A.
AU - Denysenko, I.
AU - Destefanis, M.
AU - De Mori, F.
AU - Ding, Y.
AU - Dong, C.
AU - Dong, J.
AU - Dong, L. Y.
AU - Dong, M. Y.
AU - Dou, Z. L.
AU - Du, S. X.
AU - Duan, P. F.
AU - Fan, J. Z.
AU - Fang, J.
AU - Fang, S. S.
AU - Fang, X.
AU - Fang, Y.
AU - Farinelli, R.
AU - Fava, L.
AU - Feldbauer, F.
AU - Felici, G.
AU - Feng, C. Q.
AU - Fioravanti, E.
AU - Fritsch, M.
AU - Fu, C. D.
AU - Gao, Q.
AU - Gao, X. L.
AU - Gao, Y.
AU - Gao, Z.
AU - Garzia, I.
AU - Goetzen, K.
AU - Gong, L.
AU - Gong, W. X.
AU - Gradl, W.
AU - Greco, M.
AU - Gu, M. H.
AU - Gu, Y. T.
AU - Guan, Y. H.
AU - Guo, A. Q.
AU - Guo, L. B.
AU - Guo, R. P.
AU - Guo, Y.
AU - Guo, Y. P.
AU - Haddadi, Z.
AU - Hafner, A.
AU - Han, S.
AU - Hao, X. Q.
AU - Harris, F. A.
AU - He, K. L.
AU - Heinsius, F. H.
AU - Held, T.
AU - Heng, Y. K.
AU - Holtmann, T.
AU - Hou, Z. L.
AU - Hu, C.
AU - Hu, H. M.
AU - Hu, T.
AU - Hu, Y.
AU - Huang, G. S.
AU - Huang, J. S.
AU - Huang, X. T.
AU - Huang, X. Z.
AU - Huang, Z. L.
AU - Hussain, T.
AU - Ikegami Andersson, W.
AU - Ji, Q.
AU - Ji, Q. P.
AU - Ji, X. B.
AU - Ji, X. L.
AU - Jiang, L. W.
AU - Jiang, X. S.
AU - Jiang, X. Y.
AU - Jiao, J. B.
AU - Jiao, Z.
AU - Jin, D. P.
AU - Jin, S.
AU - Johansson, T.
AU - Julin, A.
AU - Kalantar-Nayestanaki, N.
AU - Kang, X. L.
AU - Kang, X. S.
AU - Kavatsyuk, M.
AU - Ke, B. C.
AU - Kiese, P.
AU - Kliemt, R.
AU - Kloss, B.
AU - Kolcu, O. B.
AU - Kopf, B.
AU - Kornicer, M.
AU - Kupsc, A.
AU - Kühn, W.
AU - Lange, J. S.
AU - Lara, M.
AU - Larin, P.
AU - Leithoff, H.
AU - Leng, C.
AU - Li, C.
AU - Li, Cheng
AU - Li, D. M.
AU - Li, F.
AU - Li, F. Y.
AU - Li, G.
AU - Li, H. B.
AU - Li, H. J.
AU - Li, J. C.
AU - Li, Jin
AU - Li, Kang
AU - Li, Ke
AU - Li, Lei
AU - Li, P. R.
AU - Li, Q. Y.
AU - Li, T.
AU - Li, W. D.
AU - Li, W. G.
AU - Li, X. L.
AU - Li, X. N.
AU - Li, X. Q.
AU - Li, Y. B.
AU - Li, Z. B.
AU - Liang, H.
AU - Liang, Y. F.
AU - Liang, Y. T.
AU - Liao, G. R.
AU - Lin, D. X.
AU - Liu, B.
AU - Liu, B. J.
AU - Liu, C. X.
AU - Liu, D.
AU - Liu, F. H.
AU - Liu, Fang
AU - Liu, Feng
AU - Liu, H. B.
AU - Liu, H. M.
AU - Liu, Huanhuan
AU - Liu, Huihui
AU - Liu, J.
AU - Liu, J. B.
AU - Liu, J. P.
AU - Liu, J. Y.
AU - Liu, K.
AU - Liu, K. Y.
AU - Liu, L. D.
AU - Liu, P. L.
AU - Liu, Q.
AU - Liu, S. B.
AU - Liu, X.
AU - Liu, Y. B.
AU - Liu, Y. Y.
AU - Liu, Z. A.
AU - Liu, Zhiqing
AU - Loehner, H.
AU - Long, Y. F.
AU - Lou, X. C.
AU - Lu, H. J.
AU - Lu, J. G.
AU - Lu, Y.
AU - Lu, Y. P.
AU - Luo, C. L.
AU - Luo, M. X.
AU - Luo, T.
AU - Luo, X. L.
AU - Lyu, X. R.
AU - Ma, F. C.
AU - Ma, H. L.
AU - Ma, L. L.
AU - Ma, M. M.
AU - Ma, Q. M.
AU - Ma, T.
AU - Ma, X. N.
AU - Ma, X. Y.
AU - Ma, Y. M.
AU - Maas, F. E.
AU - Maggiora, M.
AU - Malik, Q. A.
AU - Mao, Y. J.
AU - Mao, Z. P.
AU - Marcello, S.
AU - Messchendorp, J. G.
AU - Mezzadri, G.
AU - Min, J.
AU - Min, T. J.
AU - Mitchell, R. E.
AU - Mo, X. H.
AU - Mo, Y. J.
AU - Morales Morales, C.
AU - Muchnoi, N. Yu
AU - Muramatsu, H.
AU - Musiol, P.
AU - Nefedov, Y.
AU - Nerling, F.
AU - Nikolaev, I. B.
AU - Ning, Z.
AU - Nisar, S.
AU - Niu, S. L.
AU - Niu, X. Y.
AU - Olsen, S. L.
AU - Ouyang, Q.
AU - Pacetti, S.
AU - Pan, Y.
AU - Papenbrock, M.
AU - Patteri, P.
AU - Pelizaeus, M.
AU - Peng, H. P.
AU - Peters, K.
AU - Pettersson, J.
AU - Ping, J. L.
AU - Ping, R. G.
AU - Poling, R.
AU - Prasad, V.
AU - Qi, H. R.
AU - Qi, M.
AU - Qian, S.
AU - Qiao, C. F.
AU - Qin, L. Q.
AU - Qin, N.
AU - Qin, X. S.
AU - Qin, Z. H.
AU - Qiu, J. F.
AU - Rashid, K. H.
AU - Redmer, C. F.
AU - Ripka, M.
AU - Rong, G.
AU - Rosner, Ch
AU - Ruan, X. D.
AU - Sarantsev, A.
AU - Savrié, M.
AU - Schnier, C.
AU - Schoenning, K.
AU - Shan, W.
AU - Shao, M.
AU - Shen, C. P.
AU - Shen, P. X.
AU - Shen, X. Y.
AU - Sheng, H. Y.
AU - Song, W. M.
AU - Song, X. Y.
AU - Sosio, S.
AU - Spataro, S.
AU - Sun, G. X.
AU - Sun, J. F.
AU - Sun, S. S.
AU - Sun, X. H.
AU - Sun, Y. J.
AU - Sun, Y. Z.
AU - Sun, Z. J.
AU - Sun, Z. T.
AU - Tang, C. J.
AU - Tang, X.
AU - Tapan, I.
AU - Thorndike, E. H.
AU - Tiemens, M.
AU - Uman, I.
AU - Varner, G. S.
AU - Wang, B.
AU - Wang, B. L.
AU - Wang, D.
AU - Wang, D. Y.
AU - Wang, K.
AU - Wang, L. L.
AU - Wang, L. S.
AU - Wang, M.
AU - Wang, P.
AU - Wang, P. L.
AU - Wang, W.
AU - Wang, W. P.
AU - Wang, X. F.
AU - Wang, Y.
AU - Wang, Y. D.
AU - Wang, Y. F.
AU - Wang, Y. Q.
AU - Wang, Z.
AU - Wang, Z. G.
AU - Wang, Z. H.
AU - Wang, Z. Y.
AU - Wang, Zongyuan
AU - Weber, T.
AU - Wei, D. H.
AU - Weidenkaff, P.
AU - Wen, S. P.
AU - Wiedner, U.
AU - Wolke, M.
AU - Wu, L. H.
AU - Wu, L. J.
AU - Wu, Z.
AU - Xia, L.
AU - Xia, L. G.
AU - Xia, Y.
AU - Xiao, D.
AU - Xiao, H.
AU - Xiao, Z. J.
AU - Xie, Y. G.
AU - Xie, Y. H.
AU - Xiu, Q. L.
AU - Xu, G. F.
AU - Xu, J. J.
AU - Xu, L.
AU - Xu, Q. J.
AU - Xu, Q. N.
AU - Xu, X. P.
AU - Yan, L.
AU - Yan, W. B.
AU - Yan, W. C.
AU - Yan, Y. H.
AU - Yang, H. J.
AU - Yang, H. X.
AU - Yang, L.
AU - Yang, Y. X.
AU - Ye, M.
AU - Ye, M. H.
AU - Yin, J. H.
AU - You, Z. Y.
AU - Yu, B. X.
AU - Yu, C. X.
AU - Yu, J. S.
AU - Yuan, C. Z.
AU - Yuan, Y.
AU - Yuncu, A.
AU - Zafar, A. A.
AU - Zeng, Y.
AU - Zeng, Z.
AU - Zhang, B. X.
AU - Zhang, B. Y.
AU - Zhang, C. C.
AU - Zhang, D. H.
AU - Zhang, H. H.
AU - Zhang, H. Y.
AU - Zhang, J.
AU - Zhang, J. J.
AU - Zhang, J. L.
AU - Zhang, J. Q.
AU - Zhang, J. W.
AU - Zhang, J. Y.
AU - Zhang, J. Z.
AU - Zhang, K.
AU - Zhang, L.
AU - Zhang, S. Q.
AU - Zhang, X. Y.
AU - Zhang, Y. H.
AU - Zhang, Y. N.
AU - Zhang, Y. T.
AU - Zhang, Yang
AU - Zhang, Yao
AU - Zhang, Yu
AU - Zhang, Z. H.
AU - Zhang, Z. P.
AU - Zhang, Z. Y.
AU - Zhao, G.
AU - Zhao, J. W.
AU - Zhao, J. Y.
AU - Zhao, J. Z.
AU - Zhao, Lei
AU - Zhao, Ling
AU - Zhao, M. G.
AU - Zhao, Q.
AU - Zhao, Q. W.
AU - Zhao, S. J.
AU - Zhao, T. C.
AU - Zhao, Y. B.
AU - Zhao, Z. G.
AU - Zhemchugov, A.
AU - Zheng, B.
AU - Zheng, J. P.
AU - Zheng, W. J.
AU - Zheng, Y. H.
AU - Zhong, B.
AU - Zhou, L.
AU - Zhou, X.
AU - Zhou, X. K.
AU - Zhou, X. R.
AU - Zhou, X. Y.
AU - Zhu, K.
AU - Zhu, K. J.
AU - Zhu, S.
AU - Zhu, S. H.
AU - Zhu, X. L.
AU - Zhu, Y. C.
AU - Zhu, Y. S.
AU - Zhu, Z. A.
AU - Zhuang, J.
AU - Zotti, L.
AU - Zou, B. S.
AU - Zou, J. H.
N1 - Funding Information: The BESIII Collaboration thanks the staff of BEPCII, the IHEP computing center and the supercomputing center of USTC for their strong support. This work is supported in part by National Key Basic Research Program of China under Contract No. 2015CB856700; National Natural Science Foundation of China (NSFC) under Contracts No. 11235011, No. 11335008, No. 11375170, No. 11425524, No. 11475164, No. 11475169, No. 11625523, No. 11605196, No. 11605198, No. 11635010; the Chinese Academy of Sciences (CAS) Large-Scale Scientific Facility Program; the CAS Center for Excellence in Particle Physics (CCEPP); Joint Large-Scale Scientific Facility Funds of the NSFC and CAS under Contracts No. U1332201, No. U1532257, No. U1532258, No. U1532102; CAS under Contracts No. KJCX2-YW-N29, No. KJCX2-YW-N45, No. QYZDJ-SSW-SLH003; 100 Talents Program of CAS; National 1000 Talents Program of China; INPAC and Shanghai Key Laboratory for Particle Physics and Cosmology; German Research Foundation Funding Information: DFG under Contracts No. Collaborative Research Center CRC 1044, No. FOR 2359; Istituto Nazionale di Fisica Nucleare, Italy; Joint Large-Scale Scientific Facility Funds of the NSFC and CAS; Koninklijke Nederlandse Akademie van Wetenschappen (KNAW) under Contract No. 530-4CDP03; Ministry of Development of Turkey under Contract No. DPT2006K-120470; National Natural Science Foundation of China (NSFC); National Science and Technology Fund; The Swedish Research Council; U.S. Department of Energy under Contracts No. DE-FG02-05ER41374, No. DE-SC-0010118, No. DE-SC-0010504, No. DE-SC-0012069; University of Groningen (RuG) and the Helmholtzzentrum fuer Schwerionenforschung GmbH (GSI), Darmstadt; WCU Program of National Research Foundation of Korea under Contract No. R32-2008-000-10155-0. Publisher Copyright: © 2017 American Physical Society.
PY - 2017/8/1
Y1 - 2017/8/1
N2 - We study the process e+e- → π+π- φ (3686) using 5.1 fb-1 of data collected at 16 center-of-mass energy (√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- → π+π- φ(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=c2 and Λ = 80.1 ± 24.6 ± 2.9 MeV, and the second has M = 4383.8 ± 4.2 ± 0.8 MeV=c2 and F = 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- → π+π- φ(3686) for the first time with a statistical significance of 5.8σ. A charged charmoniumlike structure is observed in the π± φ(3686) invariant mass spectrum for data at √s = 4.416 GeV. A fit with an S-wave Breit-Wigner function yields a mass M = 4032.1 ± 2.4 MeV=c2, 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.
AB - We study the process e+e- → π+π- φ (3686) using 5.1 fb-1 of data collected at 16 center-of-mass energy (√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- → π+π- φ(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=c2 and Λ = 80.1 ± 24.6 ± 2.9 MeV, and the second has M = 4383.8 ± 4.2 ± 0.8 MeV=c2 and F = 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- → π+π- φ(3686) for the first time with a statistical significance of 5.8σ. A charged charmoniumlike structure is observed in the π± φ(3686) invariant mass spectrum for data at √s = 4.416 GeV. A fit with an S-wave Breit-Wigner function yields a mass M = 4032.1 ± 2.4 MeV=c2, 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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U2 - 10.1103/PhysRevD.96.032004
DO - 10.1103/PhysRevD.96.032004
M3 - Article
AN - SCOPUS:85042325503
VL - 96
JO - Physical Review D
JF - Physical Review D
SN - 2470-0010
IS - 3
M1 - 032004
ER -