Search for hidden-charm tetraquark with strangeness in

M. Ablikim (Institute of High Energy Physics, China) ; M. N. Achasov (G.I. Budker Institute of Nuclear Physics SB RAS (BINP), Russia; Also at the Novosibirsk State University, Novosibirsk, Russia) ; P. Adlarson (Uppsala University, Box 516, Sweden) ; M. Albrecht (Bochum Ruhr-University, Germany) ; R. Aliberti (Johannes Gutenberg University of Mainz, Johann-Joachim-Becher-Weg 45, Germany) ; et al. - Show all 584 authors

We report a search for a heavier partner of the recently observed $ Z_{cs}(3985)^{-} $ state, denoted as $ Z_{cs}(3985)^{-} $ , in the process $ Z_{cs}(3985)^{-} $ , based on $ Z_{cs}(3985)^{-} $ collision data collected at the center-of-mass energies of $ Z_{cs}(3985)^{-} $ , 4.682 and 4.699 GeV with the BESIII detector. The $ Z_{cs}(3985)^{-} $ is of interest as it is expected to be a candidate for a hidden-charm and open-strange tetraquark. A partial-reconstruction technique is used to isolate $ Z_{cs}(3985)^{-} $ recoil-mass spectra, which are probed for a potential contribution from $ Z_{cs}(3985)^{-} $ ( $ Z_{cs}(3985)^{-} $ ). We find an excess of $ Z_{cs}(3985)^{-} $ ( $ Z_{cs}(3985)^{-} $ ) candidates with a significance of $ Z_{cs}(3985)^{-} $ , after considering systematic uncertainties, at a mass of $ Z_{cs}(3985)^{-} $ . As the data set is limited in size, the upper limits are evaluated at the 90% confidence level on the product of the Born cross sections ( $ Z_{cs}(3985)^{-} $ ) and the branching fraction ( $ Z_{cs}(3985)^{-} $ ) of $ Z_{cs}(3985)^{-} $ , under different assumptions of the $ Z_{cs}(3985)^{-} $ mass from 4.120 to 4.140 MeV and of the width from 10 to 50 MeV at the three center-of-mass energies. The upper limits of $ Z_{cs}(3985)^{-} $ are found to be at the level of $ Z_{cs}(3985)^{-} $ pb at each energy. Larger data samples are needed to confirm the $ Z_{cs}(3985)^{-} $ state and clarify its nature in the coming years.

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      "full_name": "Dong,J."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Institute of High Energy Physics, China"
        }, 
        {
          "country": "China", 
          "value": "University of Chinese Academy of Sciences, China"
        }
      ], 
      "surname": "Dong", 
      "given_names": "L. Y.", 
      "full_name": "Dong,L. Y."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Institute of High Energy Physics, China"
        }, 
        {
          "country": "China", 
          "value": "State Key Laboratory of Particle Detection and Electronics, Beijing 100049, China"
        }, 
        {
          "country": "China", 
          "value": "University of Chinese Academy of Sciences, China"
        }
      ], 
      "surname": "Dong", 
      "given_names": "M. Y.", 
      "full_name": "Dong,M. Y."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Wuhan University, China"
        }
      ], 
      "surname": "Dong", 
      "given_names": "X.", 
      "full_name": "Dong,X."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Zhengzhou University, China"
        }
      ], 
      "surname": "Du", 
      "given_names": "S. X.", 
      "full_name": "Du,S. X."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Nanjing University, China"
        }
      ], 
      "surname": "Duan", 
      "given_names": "Z. H.", 
      "full_name": "Duan,Z. H."
    }, 
    {
      "affiliations": [
        {
          "country": "Russia", 
          "value": "Joint Institute for Nuclear Research, 141980 Dubna, Russia"
        }, 
        {
          "country": "Russia", 
          "value": "Also at the Moscow Institute of Physics and Technology, Russia"
        }
      ], 
      "surname": "Egorov", 
      "given_names": "P.", 
      "full_name": "Egorov,P."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Wuhan University, China"
        }
      ], 
      "surname": "Fan", 
      "given_names": "Y. L.", 
      "full_name": "Fan,Y. L."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Institute of High Energy Physics, China"
        }, 
        {
          "country": "China", 
          "value": "State Key Laboratory of Particle Detection and Electronics, Beijing 100049, China"
        }
      ], 
      "surname": "Fang", 
      "given_names": "J.", 
      "full_name": "Fang,J."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Institute of High Energy Physics, China"
        }, 
        {
          "country": "China", 
          "value": "University of Chinese Academy of Sciences, China"
        }
      ], 
      "surname": "Fang", 
      "given_names": "S. S.", 
      "full_name": "Fang,S. S."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Institute of High Energy Physics, China"
        }
      ], 
      "surname": "Fang", 
      "given_names": "W. X.", 
      "full_name": "Fang,W. X."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Institute of High Energy Physics, China"
        }
      ], 
      "surname": "Fang", 
      "given_names": "Y.", 
      "full_name": "Fang,Y."
    }, 
    {
      "affiliations": [
        {
          "country": "Italy", 
          "value": "INFN Sezione di Ferrara, INFN Sezione di Ferrara, I-44122, Italy"
        }
      ], 
      "surname": "Farinelli", 
      "given_names": "R.", 
      "full_name": "Farinelli,R."
    }, 
    {
      "affiliations": [
        {
          "country": "Italy", 
          "value": "University of Turin and INFN, University of Eastern Piedmont, I-15121, Italy"
        }, 
        {
          "country": "Italy", 
          "value": "University of Turin and INFN, INFN, I-10125, Italy"
        }
      ], 
      "surname": "Fava", 
      "given_names": "L.", 
      "full_name": "Fava,L."
    }, 
    {
      "affiliations": [
        {
          "country": "Germany", 
          "value": "Bochum Ruhr-University, Germany"
        }
      ], 
      "surname": "Feldbauer", 
      "given_names": "F.", 
      "full_name": "Feldbauer,F."
    }, 
    {
      "affiliations": [
        {
          "country": "Italy", 
          "value": "INFN Laboratori Nazionali di Frascati, INFN Laboratori Nazionali di Frascati, I-00044, Italy"
        }
      ], 
      "surname": "Felici", 
      "given_names": "G.", 
      "full_name": "Felici,G."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "University of Science and Technology of China, China"
        }, 
        {
          "country": "China", 
          "value": "State Key Laboratory of Particle Detection and Electronics, Beijing 100049, China"
        }
      ], 
      "surname": "Feng", 
      "given_names": "C. Q.", 
      "full_name": "Feng,C. Q."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Sun Yat-Sen University, China"
        }
      ], 
      "surname": "Feng", 
      "given_names": "J. H.", 
      "full_name": "Feng,J. H."
    }, 
    {
      "affiliations": [
        {
          "country": "UK", 
          "value": "University of Oxford, Keble Road, United Kingdom"
        }
      ], 
      "surname": "Fischer", 
      "given_names": "K", 
      "full_name": "Fischer,K"
    }, 
    {
      "affiliations": [
        {
          "country": "Germany", 
          "value": "Bochum Ruhr-University, Germany"
        }
      ], 
      "surname": "Fritsch", 
      "given_names": "M.", 
      "full_name": "Fritsch,M."
    }, 
    {
      "affiliations": [
        {
          "country": "Germany", 
          "value": "University of Muenster, Wilhelm-Klemm-Strasse 9, Germany"
        }
      ], 
      "surname": "Fritzsch", 
      "given_names": "C.", 
      "full_name": "Fritzsch,C."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Institute of High Energy Physics, China"
        }
      ], 
      "surname": "Fu", 
      "given_names": "C. D.", 
      "full_name": "Fu,C. D."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "University of Chinese Academy of Sciences, China"
        }
      ], 
      "surname": "Gao", 
      "given_names": "H.", 
      "full_name": "Gao,H."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Peking University, China"
        }, 
        {
          "country": "China", 
          "value": "Also at State Key Laboratory of Nuclear Physics and Technology, Peking University, China"
        }
      ], 
      "surname": "Gao", 
      "given_names": "Y. N.", 
      "full_name": "Gao,Y. N."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "University of Science and Technology of China, China"
        }, 
        {
          "country": "China", 
          "value": "State Key Laboratory of Particle Detection and Electronics, Beijing 100049, China"
        }
      ], 
      "surname": "Gao", 
      "given_names": "Yang", 
      "full_name": "Gao,Yang"
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    {
      "affiliations": [
        {
          "country": "Italy", 
          "value": "University of Turin and INFN, INFN, I-10125, Italy"
        }
      ], 
      "surname": "Garbolino", 
      "given_names": "S.", 
      "full_name": "Garbolino,S."
    }, 
    {
      "affiliations": [
        {
          "country": "Italy", 
          "value": "INFN Sezione di Ferrara, INFN Sezione di Ferrara, I-44122, Italy"
        }, 
        {
          "country": "Italy", 
          "value": "INFN Sezione di Ferrara, University of Ferrara, I-44122, Italy"
        }
      ], 
      "surname": "Garzia", 
      "given_names": "I.", 
      "full_name": "Garzia,I."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Wuhan University, China"
        }
      ], 
      "surname": "Ge", 
      "given_names": "P. T.", 
      "full_name": "Ge,P. T."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Nanjing University, China"
        }
      ], 
      "surname": "Ge", 
      "given_names": "Z. W.", 
      "full_name": "Ge,Z. W."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Sun Yat-Sen University, China"
        }
      ], 
      "surname": "Geng", 
      "given_names": "C.", 
      "full_name": "Geng,C."
    }, 
    {
      "affiliations": [
        {
          "country": "UK", 
          "value": "University of Manchester, Oxford Road, Manchester, United Kingdom"
        }
      ], 
      "surname": "Gersabeck", 
      "given_names": "E. M.", 
      "full_name": "Gersabeck,E. M."
    }, 
    {
      "affiliations": [
        {
          "country": "UK", 
          "value": "University of Oxford, Keble Road, United Kingdom"
        }
      ], 
      "surname": "Gilman", 
      "given_names": "A", 
      "full_name": "Gilman,A"
    }, 
    {
      "affiliations": [
        {
          "country": "Germany", 
          "value": "GSI Helmholtzcentre for Heavy Ion Research GmbH, Germany"
        }
      ], 
      "surname": "Goetzen", 
      "given_names": "K.", 
      "full_name": "Goetzen,K."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Liaoning University, China"
        }
      ], 
      "surname": "Gong", 
      "given_names": "L.", 
      "full_name": "Gong,L."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Institute of High Energy Physics, China"
        }, 
        {
          "country": "China", 
          "value": "State Key Laboratory of Particle Detection and Electronics, Beijing 100049, China"
        }
      ], 
      "surname": "Gong", 
      "given_names": "W. X.", 
      "full_name": "Gong,W. X."
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    {
      "affiliations": [
        {
          "country": "Germany", 
          "value": "Johannes Gutenberg University of Mainz, Johann-Joachim-Becher-Weg 45, Germany"
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      ], 
      "surname": "Gradl", 
      "given_names": "W.", 
      "full_name": "Gradl,W."
    }, 
    {
      "affiliations": [
        {
          "country": "Italy", 
          "value": "University of Turin and INFN, University of Turin, I-10125, Italy"
        }, 
        {
          "country": "Italy", 
          "value": "University of Turin and INFN, INFN, I-10125, Italy"
        }
      ], 
      "surname": "Greco", 
      "given_names": "M.", 
      "full_name": "Greco,M."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Nanjing University, China"
        }
      ], 
      "surname": "Gu", 
      "given_names": "L. M.", 
      "full_name": "Gu,L. M."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Institute of High Energy Physics, China"
        }, 
        {
          "country": "China", 
          "value": "State Key Laboratory of Particle Detection and Electronics, Beijing 100049, China"
        }
      ], 
      "surname": "Gu", 
      "given_names": "M. H.", 
      "full_name": "Gu,M. H."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Guangxi University, China"
        }
      ], 
      "surname": "Gu", 
      "given_names": "Y. T.", 
      "full_name": "Gu,Y. T."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Institute of High Energy Physics, China"
        }, 
        {
          "country": "China", 
          "value": "University of Chinese Academy of Sciences, China"
        }
      ], 
      "surname": "Y Guan", 
      "given_names": "C.", 
      "full_name": "Y Guan,C."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Institute of Modern Physics, Lanzhou 730000, People's Republic of China"
        }, 
        {
          "country": "China", 
          "value": "University of Chinese Academy of Sciences, China"
        }
      ], 
      "surname": "Guo", 
      "given_names": "A. Q.", 
      "full_name": "Guo,A. Q."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Nanjing Normal University, China"
        }
      ], 
      "surname": "Guo", 
      "given_names": "L. B.", 
      "full_name": "Guo,L. B."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Shandong Normal University, China"
        }
      ], 
      "surname": "Guo", 
      "given_names": "R. P.", 
      "full_name": "Guo,R. P."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Fudan University, China"
        }, 
        {
          "country": "China", 
          "value": "Also at Key Laboratory of Nuclear Physics and Ion-beam Application (MOE) and Institute of Modern Physics, Fudan University, China"
        }
      ], 
      "surname": "Guo", 
      "given_names": "Y. P.", 
      "full_name": "Guo,Y. P."
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    {
      "affiliations": [
        {
          "country": "Russia", 
          "value": "Joint Institute for Nuclear Research, 141980 Dubna, Russia"
        }, 
        {
          "country": "Russia", 
          "value": "Also at the Moscow Institute of Physics and Technology, Russia"
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      ], 
      "surname": "Guskov", 
      "given_names": "A.", 
      "full_name": "Guskov,A."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Liaoning Normal University, China"
        }
      ], 
      "surname": "Han", 
      "given_names": "W. Y.", 
      "full_name": "Han,W. Y."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Henan Normal University, China"
        }
      ], 
      "surname": "Hao", 
      "given_names": "X. Q.", 
      "full_name": "Hao,X. Q."
    }, 
    {
      "affiliations": [
        {
          "country": "USA", 
          "value": "University of Hawaii, Honolulu, USA"
        }
      ], 
      "surname": "Harris", 
      "given_names": "F. A.", 
      "full_name": "Harris,F. A."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Soochow University, China"
        }
      ], 
      "surname": "He", 
      "given_names": "K. K.", 
      "full_name": "He,K. K."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Institute of High Energy Physics, China"
        }, 
        {
          "country": "China", 
          "value": "University of Chinese Academy of Sciences, China"
        }
      ], 
      "surname": "He", 
      "given_names": "K. L.", 
      "full_name": "He,K. L."
    }, 
    {
      "affiliations": [
        {
          "country": "Germany", 
          "value": "Bochum Ruhr-University, Germany"
        }
      ], 
      "surname": "Heinsius", 
      "given_names": "F. H.", 
      "full_name": "Heinsius,F. H."
    }, 
    {
      "affiliations": [
        {
          "country": "Germany", 
          "value": "Johannes Gutenberg University of Mainz, Johann-Joachim-Becher-Weg 45, Germany"
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      ], 
      "surname": "Heinz", 
      "given_names": "C. H.", 
      "full_name": "Heinz,C. H."
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    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Institute of High Energy Physics, China"
        }, 
        {
          "country": "China", 
          "value": "State Key Laboratory of Particle Detection and Electronics, Beijing 100049, China"
        }, 
        {
          "country": "China", 
          "value": "University of Chinese Academy of Sciences, China"
        }
      ], 
      "surname": "Heng", 
      "given_names": "Y. K.", 
      "full_name": "Heng,Y. K."
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    {
      "affiliations": [
        {
          "country": "Thailand", 
          "value": "Suranaree University of Technology, University Avenue 111, Thailand"
        }
      ], 
      "surname": "Herold", 
      "given_names": "C.", 
      "full_name": "Herold,C."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Institute of High Energy Physics, China"
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        {
          "country": "China", 
          "value": "University of Chinese Academy of Sciences, China"
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      ], 
      "surname": "Hou", 
      "given_names": "G. Y.", 
      "full_name": "Hou,G. Y."
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    {
      "affiliations": [
        {
          "country": "China", 
          "value": "University of Chinese Academy of Sciences, China"
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      ], 
      "surname": "Hou", 
      "given_names": "Y. R.", 
      "full_name": "Hou,Y. R."
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    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Institute of High Energy Physics, China"
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      ], 
      "surname": "Hou", 
      "given_names": "Z. L.", 
      "full_name": "Hou,Z. L."
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    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Institute of High Energy Physics, China"
        }, 
        {
          "country": "China", 
          "value": "University of Chinese Academy of Sciences, China"
        }
      ], 
      "surname": "Hu", 
      "given_names": "H. M.", 
      "full_name": "Hu,H. M."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "South China Normal University, China"
        }, 
        {
          "country": "China", 
          "value": "Also at Guangdong Provincial Key Laboratory of Nuclear Science, Institute of Quantum Matter, South China Normal University, China"
        }
      ], 
      "surname": "Hu", 
      "given_names": "J. F.", 
      "full_name": "Hu,J. F."
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    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Institute of High Energy Physics, China"
        }, 
        {
          "country": "China", 
          "value": "State Key Laboratory of Particle Detection and Electronics, Beijing 100049, China"
        }, 
        {
          "country": "China", 
          "value": "University of Chinese Academy of Sciences, China"
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      ], 
      "surname": "Hu", 
      "given_names": "T.", 
      "full_name": "Hu,T."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Institute of High Energy Physics, China"
        }
      ], 
      "surname": "Hu", 
      "given_names": "Y.", 
      "full_name": "Hu,Y."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "University of Science and Technology of China, China"
        }, 
        {
          "country": "China", 
          "value": "State Key Laboratory of Particle Detection and Electronics, Beijing 100049, China"
        }
      ], 
      "surname": "Huang", 
      "given_names": "G. S.", 
      "full_name": "Huang,G. S."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Sun Yat-Sen University, China"
        }
      ], 
      "surname": "Huang", 
      "given_names": "K. X.", 
      "full_name": "Huang,K. X."
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    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Institute of Modern Physics, Lanzhou 730000, People's Republic of China"
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        {
          "country": "China", 
          "value": "University of Chinese Academy of Sciences, China"
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      ], 
      "surname": "Huang", 
      "given_names": "L. Q.", 
      "full_name": "Huang,L. Q."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Shandong University, China"
        }
      ], 
      "surname": "Huang", 
      "given_names": "X. T.", 
      "full_name": "Huang,X. T."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Institute of High Energy Physics, China"
        }
      ], 
      "surname": "Huang", 
      "given_names": "Y. P.", 
      "full_name": "Huang,Y. P."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Peking University, China"
        }, 
        {
          "country": "China", 
          "value": "Also at State Key Laboratory of Nuclear Physics and Technology, Peking University, China"
        }
      ], 
      "surname": "Huang", 
      "given_names": "Z.", 
      "full_name": "Huang,Z."
    }, 
    {
      "affiliations": [
        {
          "country": "Pakistan", 
          "value": "University of the Punjab, Pakistan"
        }
      ], 
      "surname": "Hussain", 
      "given_names": "T.", 
      "full_name": "Hussain,T."
    }, 
    {
      "affiliations": [
        {
          "country": "USA", 
          "value": "Indiana University, Bloomington, USA"
        }, 
        {
          "country": "Germany", 
          "value": "Johannes Gutenberg University of Mainz, Johann-Joachim-Becher-Weg 45, Germany"
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      ], 
      "surname": "H\u00fcsken", 
      "given_names": "N", 
      "full_name": "H\u00fcsken,N"
    }, 
    {
      "affiliations": [
        {
          "country": "USA", 
          "value": "Indiana University, Bloomington, USA"
        }
      ], 
      "surname": "Imoehl", 
      "given_names": "W.", 
      "full_name": "Imoehl,W."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "University of Science and Technology of China, China"
        }, 
        {
          "country": "China", 
          "value": "State Key Laboratory of Particle Detection and Electronics, Beijing 100049, China"
        }
      ], 
      "surname": "Irshad", 
      "given_names": "M.", 
      "full_name": "Irshad,M."
    }, 
    {
      "affiliations": [
        {
          "country": "USA", 
          "value": "Indiana University, Bloomington, USA"
        }
      ], 
      "surname": "Jackson", 
      "given_names": "J.", 
      "full_name": "Jackson,J."
    }, 
    {
      "affiliations": [
        {
          "country": "Germany", 
          "value": "Bochum Ruhr-University, Germany"
        }
      ], 
      "surname": "Jaeger", 
      "given_names": "S.", 
      "full_name": "Jaeger,S."
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    {
      "affiliations": [
        {
          "country": "Mongolia", 
          "value": "Institute of Physics and Technology, Peace Avenue 54B, Mongolia"
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      ], 
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    {
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        {
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    {
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        {
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        {
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          "value": "Institute of High Energy Physics, China"
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    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Henan Normal University, China"
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    {
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        {
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          "value": "Institute of High Energy Physics, China"
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        {
          "country": "China", 
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      "given_names": "X. B.", 
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    {
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        {
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        {
          "country": "China", 
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      "given_names": "X. L.", 
      "full_name": "Ji,X. L."
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    {
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        {
          "country": "China", 
          "value": "Shandong University, China"
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      "surname": "Ji", 
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    {
      "affiliations": [
        {
          "country": "China", 
          "value": "University of Science and Technology of China, China"
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        {
          "country": "China", 
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      "surname": "Jia", 
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    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Peking University, China"
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        {
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    {
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        {
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        {
          "country": "China", 
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        {
          "country": "China", 
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      "surname": "Jiang", 
      "given_names": "X. S.", 
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    {
      "affiliations": [
        {
          "country": "China", 
          "value": "University of Chinese Academy of Sciences, China"
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    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Shandong University, China"
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      ], 
      "surname": "Jiao", 
      "given_names": "J. B.", 
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    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Huangshan College, China"
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      ], 
      "surname": "Jiao", 
      "given_names": "Z.", 
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    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Nanjing University, China"
        }
      ], 
      "surname": "Jin", 
      "given_names": "S.", 
      "full_name": "Jin,S."
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    {
      "affiliations": [
        {
          "country": "China", 
          "value": "University of Jinan, China"
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      ], 
      "surname": "Jin", 
      "given_names": "Y.", 
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    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Institute of High Energy Physics, China"
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        {
          "country": "China", 
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      "surname": "Jing", 
      "given_names": "M. Q.", 
      "full_name": "Jing,M. Q."
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    {
      "affiliations": [
        {
          "country": "Sweden", 
          "value": "Uppsala University, Box 516, Sweden"
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      ], 
      "surname": "Johansson", 
      "given_names": "T.", 
      "full_name": "Johansson,T."
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    {
      "affiliations": [
        {
          "country": "Chile", 
          "value": "Instituto de Alta Investigaci\u00f3n, Universidad de Tarapac\u00e1, Casilla 7D, Chile"
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      "surname": "Kabana", 
      "given_names": "S.", 
      "full_name": "Kabana,S."
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    {
      "affiliations": [
        {
          "country": "Netherlands", 
          "value": "University of Groningen, NL-9747 AA Groningen, The Netherlands"
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      ], 
      "surname": "Kalantar-Nayestanaki", 
      "given_names": "N.", 
      "full_name": "Kalantar-Nayestanaki,N."
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    {
      "affiliations": [
        {
          "country": "China", 
          "value": "China University of Geosciences, China"
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      "surname": "Kang", 
      "given_names": "X. L.", 
      "full_name": "Kang,X. L."
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    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Liaoning University, China"
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      ], 
      "surname": "Kang", 
      "given_names": "X. S.", 
      "full_name": "Kang,X. S."
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    {
      "affiliations": [
        {
          "country": "Netherlands", 
          "value": "University of Groningen, NL-9747 AA Groningen, The Netherlands"
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      ], 
      "surname": "Kappert", 
      "given_names": "R.", 
      "full_name": "Kappert,R."
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    {
      "affiliations": [
        {
          "country": "Netherlands", 
          "value": "University of Groningen, NL-9747 AA Groningen, The Netherlands"
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      ], 
      "surname": "Kavatsyuk", 
      "given_names": "M.", 
      "full_name": "Kavatsyuk,M."
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    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Zhengzhou University, China"
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      ], 
      "surname": "Ke", 
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      "full_name": "Ke,B. C."
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    {
      "affiliations": [
        {
          "country": "Germany", 
          "value": "Bochum Ruhr-University, Germany"
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      ], 
      "surname": "Keshk", 
      "given_names": "I. K.", 
      "full_name": "Keshk,I. K."
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    {
      "affiliations": [
        {
          "country": "Germany", 
          "value": "University of Muenster, Wilhelm-Klemm-Strasse 9, Germany"
        }
      ], 
      "surname": "Khoukaz", 
      "given_names": "A.", 
      "full_name": "Khoukaz,A."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Institute of High Energy Physics, China"
        }
      ], 
      "surname": "Kiuchi", 
      "given_names": "R.", 
      "full_name": "Kiuchi,R."
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    {
      "affiliations": [
        {
          "country": "Germany", 
          "value": "GSI Helmholtzcentre for Heavy Ion Research GmbH, Germany"
        }
      ], 
      "surname": "Kliemt", 
      "given_names": "R.", 
      "full_name": "Kliemt,R."
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    {
      "affiliations": [
        {
          "country": "Germany", 
          "value": "Justus-Liebig-Universitaet Giessen, II. Physikalisches Institut, Heinrich-Buff-Ring 16, Germany"
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      "surname": "Koch", 
      "given_names": "L.", 
      "full_name": "Koch,L."
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    {
      "affiliations": [
        {
          "country": "T\u00fcrkiye", 
          "value": "Turkish Accelerator Center Particle Factory Group, Istinye University, 34010, Turkey"
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      "surname": "Kolcu", 
      "given_names": "O. B.", 
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    {
      "affiliations": [
        {
          "country": "Germany", 
          "value": "Bochum Ruhr-University, Germany"
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      "surname": "Kopf", 
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    {
      "affiliations": [
        {
          "country": "Germany", 
          "value": "Bochum Ruhr-University, Germany"
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      ], 
      "surname": "Kuemmel", 
      "given_names": "M.", 
      "full_name": "Kuemmel,M."
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    {
      "affiliations": [
        {
          "country": "Germany", 
          "value": "Bochum Ruhr-University, Germany"
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      ], 
      "surname": "Kuessner", 
      "given_names": "M.", 
      "full_name": "Kuessner,M."
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    {
      "affiliations": [
        {
          "country": "Poland", 
          "value": "National Centre for Nuclear Research, Poland"
        }, 
        {
          "country": "Sweden", 
          "value": "Uppsala University, Box 516, Sweden"
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      ], 
      "surname": "Kupsc", 
      "given_names": "A.", 
      "full_name": "Kupsc,A."
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    {
      "affiliations": [
        {
          "country": "Germany", 
          "value": "Justus-Liebig-Universitaet Giessen, II. Physikalisches Institut, Heinrich-Buff-Ring 16, Germany"
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      "surname": "K\u00fchn", 
      "given_names": "W.", 
      "full_name": "K\u00fchn,W."
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    {
      "affiliations": [
        {
          "country": "UK", 
          "value": "University of Manchester, Oxford Road, Manchester, United Kingdom"
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      ], 
      "surname": "Lane", 
      "given_names": "J. J.", 
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    {
      "affiliations": [
        {
          "country": "Germany", 
          "value": "Justus-Liebig-Universitaet Giessen, II. Physikalisches Institut, Heinrich-Buff-Ring 16, Germany"
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      "surname": "Lange", 
      "given_names": "J. S.", 
      "full_name": "Lange,J. S."
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    {
      "affiliations": [
        {
          "country": "Germany", 
          "value": "Helmholtz Institute Mainz, Staudinger Weg 18, Germany"
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      "surname": "Larin", 
      "given_names": "P.", 
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    {
      "affiliations": [
        {
          "country": "India", 
          "value": "Indian Institute of Technology Madras, India"
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      "surname": "Lavania", 
      "given_names": "A.", 
      "full_name": "Lavania,A."
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    {
      "affiliations": [
        {
          "country": "Italy", 
          "value": "University of Turin and INFN, University of Turin, I-10125, Italy"
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        {
          "country": "Italy", 
          "value": "University of Turin and INFN, INFN, I-10125, Italy"
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      ], 
      "surname": "Lavezzi", 
      "given_names": "L.", 
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    {
      "affiliations": [
        {
          "country": "China", 
          "value": "University of Science and Technology of China, China"
        }, 
        {
          "country": "China", 
          "value": "Also at Lanzhou Center for Theoretical Physics, Lanzhou University, China"
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      ], 
      "surname": "Lei", 
      "given_names": "T. T.", 
      "full_name": "Lei,T. T."
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    {
      "affiliations": [
        {
          "country": "China", 
          "value": "University of Science and Technology of China, China"
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        {
          "country": "China", 
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      "surname": "Lei", 
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    {
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        {
          "country": "Germany", 
          "value": "Johannes Gutenberg University of Mainz, Johann-Joachim-Becher-Weg 45, Germany"
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    {
      "affiliations": [
        {
          "country": "Germany", 
          "value": "Johannes Gutenberg University of Mainz, Johann-Joachim-Becher-Weg 45, Germany"
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    {
      "affiliations": [
        {
          "country": "Germany", 
          "value": "Johannes Gutenberg University of Mainz, Johann-Joachim-Becher-Weg 45, Germany"
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      "given_names": "T.", 
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    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Nankai University, China"
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      ], 
      "surname": "Li", 
      "given_names": "C.", 
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    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Qufu Normal University, China"
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      ], 
      "surname": "Li", 
      "given_names": "C.", 
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    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Liaoning Normal University, China"
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      ], 
      "surname": "Li", 
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      "full_name": "Li,C. H."
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    {
      "affiliations": [
        {
          "country": "China", 
          "value": "University of Science and Technology of China, China"
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        {
          "country": "China", 
          "value": "State Key Laboratory of Particle Detection and Electronics, Beijing 100049, China"
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      "surname": "Li", 
      "given_names": "Cheng", 
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    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Zhengzhou University, China"
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      ], 
      "surname": "Li", 
      "given_names": "D. M.", 
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    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Institute of High Energy Physics, China"
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        {
          "country": "China", 
          "value": "State Key Laboratory of Particle Detection and Electronics, Beijing 100049, China"
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      ], 
      "surname": "Li", 
      "given_names": "F.", 
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    {
      "affiliations": [
        {
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          "value": "Institute of High Energy Physics, China"
        }
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      "surname": "Li", 
      "given_names": "G.", 
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    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Shanxi Normal University, China"
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      ], 
      "surname": "Li", 
      "given_names": "H.", 
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    {
      "affiliations": [
        {
          "country": "China", 
          "value": "University of Science and Technology of China, China"
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        {
          "country": "China", 
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      "surname": "Li", 
      "given_names": "H.", 
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    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Institute of High Energy Physics, China"
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        {
          "country": "China", 
          "value": "University of Chinese Academy of Sciences, China"
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      "surname": "Li", 
      "given_names": "H. B.", 
      "full_name": "Li,H. B."
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    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Henan Normal University, China"
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      ], 
      "surname": "Li", 
      "given_names": "H. J.", 
      "full_name": "Li,H. J."
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    {
      "affiliations": [
        {
          "country": "China", 
          "value": "South China Normal University, China"
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        {
          "country": "China", 
          "value": "Also at Guangdong Provincial Key Laboratory of Nuclear Science, Institute of Quantum Matter, South China Normal University, China"
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      ], 
      "surname": "Li", 
      "given_names": "H. N.", 
      "full_name": "Li,H. N."
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    {
      "affiliations": [
        {
          "country": "Germany", 
          "value": "Bochum Ruhr-University, Germany"
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      ], 
      "surname": "Li", 
      "given_names": "J. Q.", 
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    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Sun Yat-Sen University, China"
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      ], 
      "surname": "Li", 
      "given_names": "J. S.", 
      "full_name": "Li,J. S."
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    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Shandong University, China"
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      ], 
      "surname": "Li", 
      "given_names": "J. W.", 
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    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Institute of High Energy Physics, China"
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    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Institute of High Energy Physics, China"
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        {
          "country": "China", 
          "value": "University of Chinese Academy of Sciences, China"
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      ], 
      "surname": "J Li", 
      "given_names": "L.", 
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    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Institute of High Energy Physics, China"
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      ], 
      "surname": "Li", 
      "given_names": "L. K.", 
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    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Beijing Institute of Petrochemical Technology, China"
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      ], 
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    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Nankai University, China"
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      ], 
      "surname": "Li", 
      "given_names": "M. H.", 
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    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Lanzhou University, China"
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        {
          "country": "China", 
          "value": "Also at Frontiers Science Center for Rare Isotopes, Lanzhou University, China"
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        {
          "country": "China", 
          "value": "Also at Lanzhou Center for Theoretical Physics, Lanzhou University, China"
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      ], 
      "surname": "Li", 
      "given_names": "P. R.", 
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    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Fudan University, China"
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      ], 
      "surname": "Li", 
      "given_names": "S. X.", 
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    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Tsinghua University, China"
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      ], 
      "surname": "Li", 
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    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Shandong University, China"
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      ], 
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    {
      "affiliations": [
        {
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        {
          "country": "China", 
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      "surname": "Li", 
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    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Institute of High Energy Physics, China"
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    {
      "affiliations": [
        {
          "country": "China", 
          "value": "University of Science and Technology of China, China"
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        {
          "country": "China", 
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      ], 
      "surname": "Li", 
      "given_names": "X. H.", 
      "full_name": "Li,X. H."
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    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Shandong University, China"
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      ], 
      "surname": "Li", 
      "given_names": "X. L.", 
      "full_name": "Li,X. L."
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    {
      "affiliations": [
        {
          "country": "China", 
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        {
          "country": "China", 
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      ], 
      "surname": "Li", 
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    {
      "affiliations": [
        {
          "country": "China", 
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        {
          "country": "China", 
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      ], 
      "surname": "Li", 
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      "full_name": "Li,Y. G."
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    {
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        {
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          "value": "Guangxi University, China"
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      "given_names": "Z. X.", 
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    {
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        {
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    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Nanjing University, China"
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    {
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        {
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          "value": "Institute of High Energy Physics, China"
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        {
          "country": "China", 
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      "given_names": "H.", 
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    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Jilin University, China"
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    {
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        {
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          "value": "University of Science and Technology of China, China"
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        {
          "country": "China", 
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    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Sichuan University, China"
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      "surname": "Liang", 
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    {
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        {
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          "value": "Institute of Modern Physics, Lanzhou 730000, People's Republic of China"
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        {
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    {
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        {
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          "value": "Guangxi Normal University, China"
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    {
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        {
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          "value": "Shandong University, China"
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          "value": "Suranaree University of Technology, University Avenue 111, Thailand"
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      "given_names": "A.", 
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    {
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        {
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          "value": "Sun Yat-Sen University, China"
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    {
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        {
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        {
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    {
      "affiliations": [
        {
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          "value": "Institute of High Energy Physics, China"
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    {
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        {
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          "value": "Institute of High Energy Physics, China"
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    {
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        {
          "country": "China", 
          "value": "Jilin University, China"
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      "given_names": "C.", 
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    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Institute of High Energy Physics, China"
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    {
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        {
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          "value": "Helmholtz Institute Mainz, Staudinger Weg 18, Germany"
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    {
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        {
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          "value": "Shanxi University, China"
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    {
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        {
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        {
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    {
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        {
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        {
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    {
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        {
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        {
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    {
      "affiliations": [
        {
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        {
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    {
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    {
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        {
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        {
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    {
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        {
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    {
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    {
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    {
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        {
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        {
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        {
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    {
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        {
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    {
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        {
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    {
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        {
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    {
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        {
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        {
          "country": "China", 
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      "surname": "Liu", 
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    {
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        {
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        {
          "country": "China", 
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        {
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    {
      "affiliations": [
        {
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        {
          "country": "China", 
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        {
          "country": "China", 
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      "surname": "Liu", 
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    {
      "affiliations": [
        {
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          "value": "Shandong University, China"
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    {
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        {
          "country": "China", 
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    {
      "affiliations": [
        {
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          "value": "Sun Yat-Sen University, China"
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      "surname": "Lu", 
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    {
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        {
          "country": "China", 
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      "surname": "Lu", 
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    {
      "affiliations": [
        {
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        {
          "country": "China", 
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    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Institute of High Energy Physics, China"
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      ], 
      "surname": "Lu", 
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    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Central South University, China"
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      ], 
      "surname": "Lu", 
      "given_names": "Y.", 
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    {
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        {
          "country": "China", 
          "value": "Institute of High Energy Physics, China"
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        {
          "country": "China", 
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      "surname": "Lu", 
      "given_names": "Y. P.", 
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    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Institute of High Energy Physics, China"
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        {
          "country": "China", 
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      ], 
      "surname": "Lu", 
      "given_names": "Z. H.", 
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    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Nanjing Normal University, China"
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      ], 
      "surname": "Luo", 
      "given_names": "C. L.", 
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    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Zhejiang University, China"
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      ], 
      "surname": "Luo", 
      "given_names": "M. X.", 
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    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Fudan University, China"
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        {
          "country": "China", 
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    {
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        {
          "country": "China", 
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    {
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        {
          "country": "China", 
          "value": "University of Chinese Academy of Sciences, China"
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      ], 
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    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Nankai University, China"
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      ], 
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    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Liaoning University, China"
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      ], 
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      "given_names": "F. C.", 
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    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Institute of High Energy Physics, China"
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      ], 
      "surname": "Ma", 
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    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Shandong University, China"
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      ], 
      "surname": "Ma", 
      "given_names": "L. L.", 
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    {
      "affiliations": [
        {
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          "value": "Institute of High Energy Physics, China"
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        {
          "country": "China", 
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    {
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        {
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    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Institute of High Energy Physics, China"
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        {
          "country": "China", 
          "value": "University of Chinese Academy of Sciences, China"
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    {
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        {
          "country": "China", 
          "value": "University of Chinese Academy of Sciences, China"
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    {
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        {
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    {
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        {
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    {
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    {
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    {
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    {
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        {
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    }, 
    {
      "affiliations": [
        {
          "country": "Pakistan", 
          "value": "University of the Punjab, Pakistan"
        }
      ], 
      "surname": "Malik", 
      "given_names": "Q. A.", 
      "full_name": "Malik,Q. A."
    }, 
    {
      "affiliations": [
        {
          "country": "Italy", 
          "value": "INFN Laboratori Nazionali di Frascati, INFN Sezione di Perugia, I-06100, Italy"
        }
      ], 
      "surname": "Mangoni", 
      "given_names": "A.", 
      "full_name": "Mangoni,A."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Peking University, China"
        }, 
        {
          "country": "China", 
          "value": "Also at State Key Laboratory of Nuclear Physics and Technology, Peking University, China"
        }
      ], 
      "surname": "Mao", 
      "given_names": "Y. J.", 
      "full_name": "Mao,Y. J."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Institute of High Energy Physics, China"
        }
      ], 
      "surname": "Mao", 
      "given_names": "Z. P.", 
      "full_name": "Mao,Z. P."
    }, 
    {
      "affiliations": [
        {
          "country": "Italy", 
          "value": "University of Turin and INFN, University of Turin, I-10125, Italy"
        }, 
        {
          "country": "Italy", 
          "value": "University of Turin and INFN, INFN, I-10125, Italy"
        }
      ], 
      "surname": "Marcello", 
      "given_names": "S.", 
      "full_name": "Marcello,S."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "University of Jinan, China"
        }
      ], 
      "surname": "Meng", 
      "given_names": "Z. X.", 
      "full_name": "Meng,Z. X."
    }, 
    {
      "affiliations": [
        {
          "country": "Germany", 
          "value": "GSI Helmholtzcentre for Heavy Ion Research GmbH, Germany"
        }, 
        {
          "country": "Netherlands", 
          "value": "University of Groningen, NL-9747 AA Groningen, The Netherlands"
        }
      ], 
      "surname": "Messchendorp", 
      "given_names": "J. G.", 
      "full_name": "Messchendorp,J. G."
    }, 
    {
      "affiliations": [
        {
          "country": "Italy", 
          "value": "INFN Sezione di Ferrara, INFN Sezione di Ferrara, I-44122, Italy"
        }
      ], 
      "surname": "Mezzadri", 
      "given_names": "G.", 
      "full_name": "Mezzadri,G."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Institute of High Energy Physics, China"
        }, 
        {
          "country": "China", 
          "value": "University of Chinese Academy of Sciences, China"
        }
      ], 
      "surname": "Miao", 
      "given_names": "H.", 
      "full_name": "Miao,H."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Nanjing University, China"
        }
      ], 
      "surname": "Min", 
      "given_names": "T. J.", 
      "full_name": "Min,T. J."
    }, 
    {
      "affiliations": [
        {
          "country": "USA", 
          "value": "Indiana University, Bloomington, USA"
        }
      ], 
      "surname": "Mitchell", 
      "given_names": "R. E.", 
      "full_name": "Mitchell,R. E."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Institute of High Energy Physics, China"
        }, 
        {
          "country": "China", 
          "value": "State Key Laboratory of Particle Detection and Electronics, Beijing 100049, China"
        }, 
        {
          "country": "China", 
          "value": "University of Chinese Academy of Sciences, China"
        }
      ], 
      "surname": "Mo", 
      "given_names": "X. H.", 
      "full_name": "Mo,X. H."
    }, 
    {
      "affiliations": [
        {
          "country": "Russia", 
          "value": "G.I. Budker Institute of Nuclear Physics SB RAS (BINP), Russia"
        }, 
        {
          "country": "Russia", 
          "value": "Also at the Novosibirsk State University, Novosibirsk, Russia"
        }
      ], 
      "surname": "Muchnoi", 
      "given_names": "N. Yu.", 
      "full_name": "Muchnoi,N. Yu."
    }, 
    {
      "affiliations": [
        {
          "country": "Russia", 
          "value": "Joint Institute for Nuclear Research, 141980 Dubna, Russia"
        }
      ], 
      "surname": "Nefedov", 
      "given_names": "Y.", 
      "full_name": "Nefedov,Y."
    }, 
    {
      "affiliations": [
        {
          "country": "Germany", 
          "value": "Helmholtz Institute Mainz, Staudinger Weg 18, Germany"
        }, 
        {
          "country": "Germany", 
          "value": "Also at Goethe University Frankfurt, Germany"
        }
      ], 
      "surname": "Nerling", 
      "given_names": "F.", 
      "full_name": "Nerling,F."
    }, 
    {
      "affiliations": [
        {
          "country": "Russia", 
          "value": "G.I. Budker Institute of Nuclear Physics SB RAS (BINP), Russia"
        }, 
        {
          "country": "Russia", 
          "value": "Also at the Novosibirsk State University, Novosibirsk, Russia"
        }
      ], 
      "surname": "Nikolaev", 
      "given_names": "I. B.", 
      "full_name": "Nikolaev,I. B."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Institute of High Energy Physics, China"
        }, 
        {
          "country": "China", 
          "value": "State Key Laboratory of Particle Detection and Electronics, Beijing 100049, China"
        }
      ], 
      "surname": "Ning", 
      "given_names": "Z.", 
      "full_name": "Ning,Z."
    }, 
    {
      "affiliations": [
        {
          "country": "Pakistan", 
          "value": "COMSATS University Islamabad, Lahore Campus, Defence Road, Off Raiwind Road, Pakistan"
        }, 
        {
          "country": "Pakistan", 
          "value": "Also at the Department of Mathematical Sciences, IBA, Pakistan"
        }
      ], 
      "surname": "Nisar", 
      "given_names": "S.", 
      "full_name": "Nisar,S."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Shandong University, China"
        }
      ], 
      "surname": "Niu", 
      "given_names": "Y.", 
      "full_name": "Niu,Y."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "University of Chinese Academy of Sciences, China"
        }
      ], 
      "surname": "Olsen", 
      "given_names": "S. L.", 
      "full_name": "Olsen,S. L."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Institute of High Energy Physics, China"
        }, 
        {
          "country": "China", 
          "value": "State Key Laboratory of Particle Detection and Electronics, Beijing 100049, China"
        }, 
        {
          "country": "China", 
          "value": "University of Chinese Academy of Sciences, China"
        }
      ], 
      "surname": "Ouyang", 
      "given_names": "Q.", 
      "full_name": "Ouyang,Q."
    }, 
    {
      "affiliations": [
        {
          "country": "Italy", 
          "value": "INFN Laboratori Nazionali di Frascati, INFN Sezione di Perugia, I-06100, Italy"
        }, 
        {
          "country": "Italy", 
          "value": "INFN Laboratori Nazionali di Frascati, University of Perugia, I-06100, Italy"
        }
      ], 
      "surname": "Pacetti", 
      "given_names": "S.", 
      "full_name": "Pacetti,S."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Fudan University, China"
        }, 
        {
          "country": "China", 
          "value": "Also at Key Laboratory of Nuclear Physics and Ion-beam Application (MOE) and Institute of Modern Physics, Fudan University, China"
        }
      ], 
      "surname": "Pan", 
      "given_names": "X.", 
      "full_name": "Pan,X."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Southeast University, China"
        }
      ], 
      "surname": "Pan", 
      "given_names": "Y.", 
      "full_name": "Pan,Y."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Jilin University, China"
        }
      ], 
      "surname": "Pathak", 
      "given_names": "A.", 
      "full_name": "Pathak,A."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "University of Science and Technology of China, China"
        }, 
        {
          "country": "China", 
          "value": "State Key Laboratory of Particle Detection and Electronics, Beijing 100049, China"
        }
      ], 
      "surname": "Pei", 
      "given_names": "Y. P.", 
      "full_name": "Pei,Y. P."
    }, 
    {
      "affiliations": [
        {
          "country": "Germany", 
          "value": "Bochum Ruhr-University, Germany"
        }
      ], 
      "surname": "Pelizaeus", 
      "given_names": "M.", 
      "full_name": "Pelizaeus,M."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "University of Science and Technology of China, China"
        }, 
        {
          "country": "China", 
          "value": "State Key Laboratory of Particle Detection and Electronics, Beijing 100049, China"
        }
      ], 
      "surname": "Peng", 
      "given_names": "H. P.", 
      "full_name": "Peng,H. P."
    }, 
    {
      "affiliations": [
        {
          "country": "Germany", 
          "value": "GSI Helmholtzcentre for Heavy Ion Research GmbH, Germany"
        }, 
        {
          "country": "Germany", 
          "value": "Also at Goethe University Frankfurt, Germany"
        }
      ], 
      "surname": "Peters", 
      "given_names": "K.", 
      "full_name": "Peters,K."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Nanjing Normal University, China"
        }
      ], 
      "surname": "Ping", 
      "given_names": "J. L.", 
      "full_name": "Ping,J. L."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Institute of High Energy Physics, China"
        }, 
        {
          "country": "China", 
          "value": "University of Chinese Academy of Sciences, China"
        }
      ], 
      "surname": "Ping", 
      "given_names": "R. G.", 
      "full_name": "Ping,R. G."
    }, 
    {
      "affiliations": [
        {
          "country": "Germany", 
          "value": "Johannes Gutenberg University of Mainz, Johann-Joachim-Becher-Weg 45, Germany"
        }
      ], 
      "surname": "Plura", 
      "given_names": "S.", 
      "full_name": "Plura,S."
    }, 
    {
      "affiliations": [
        {
          "country": "Russia", 
          "value": "Joint Institute for Nuclear Research, 141980 Dubna, Russia"
        }
      ], 
      "surname": "Pogodin", 
      "given_names": "S.", 
      "full_name": "Pogodin,S."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "University of Science and Technology of China, China"
        }, 
        {
          "country": "China", 
          "value": "State Key Laboratory of Particle Detection and Electronics, Beijing 100049, China"
        }
      ], 
      "surname": "Prasad", 
      "given_names": "V.", 
      "full_name": "Prasad,V."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Institute of High Energy Physics, China"
        }
      ], 
      "surname": "Qi", 
      "given_names": "F. Z.", 
      "full_name": "Qi,F. Z."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "University of Science and Technology of China, China"
        }, 
        {
          "country": "China", 
          "value": "State Key Laboratory of Particle Detection and Electronics, Beijing 100049, China"
        }
      ], 
      "surname": "Qi", 
      "given_names": "H.", 
      "full_name": "Qi,H."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Tsinghua University, China"
        }
      ], 
      "surname": "Qi", 
      "given_names": "H. R.", 
      "full_name": "Qi,H. R."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Nanjing University, China"
        }
      ], 
      "surname": "Qi", 
      "given_names": "M.", 
      "full_name": "Qi,M."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Fudan University, China"
        }, 
        {
          "country": "China", 
          "value": "Also at Key Laboratory of Nuclear Physics and Ion-beam Application (MOE) and Institute of Modern Physics, Fudan University, China"
        }
      ], 
      "surname": "Qi", 
      "given_names": "T. Y.", 
      "full_name": "Qi,T. Y."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Institute of High Energy Physics, China"
        }, 
        {
          "country": "China", 
          "value": "State Key Laboratory of Particle Detection and Electronics, Beijing 100049, China"
        }
      ], 
      "surname": "Qian", 
      "given_names": "S.", 
      "full_name": "Qian,S."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "University of Chinese Academy of Sciences, China"
        }
      ], 
      "surname": "Qian", 
      "given_names": "W. B.", 
      "full_name": "Qian,W. B."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Sun Yat-Sen University, China"
        }
      ], 
      "surname": "Qian", 
      "given_names": "Z.", 
      "full_name": "Qian,Z."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "University of Chinese Academy of Sciences, China"
        }
      ], 
      "surname": "Qiao", 
      "given_names": "C. F.", 
      "full_name": "Qiao,C. F."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "University of South China, China"
        }
      ], 
      "surname": "Qin", 
      "given_names": "J. J.", 
      "full_name": "Qin,J. J."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Guangxi Normal University, China"
        }
      ], 
      "surname": "Qin", 
      "given_names": "L. Q.", 
      "full_name": "Qin,L. Q."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Fudan University, China"
        }, 
        {
          "country": "China", 
          "value": "Also at Key Laboratory of Nuclear Physics and Ion-beam Application (MOE) and Institute of Modern Physics, Fudan University, China"
        }
      ], 
      "surname": "Qin", 
      "given_names": "X. P.", 
      "full_name": "Qin,X. P."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Shandong University, China"
        }
      ], 
      "surname": "Qin", 
      "given_names": "X. S.", 
      "full_name": "Qin,X. S."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Institute of High Energy Physics, China"
        }, 
        {
          "country": "China", 
          "value": "State Key Laboratory of Particle Detection and Electronics, Beijing 100049, China"
        }
      ], 
      "surname": "Qin", 
      "given_names": "Z. H.", 
      "full_name": "Qin,Z. H."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Institute of High Energy Physics, China"
        }
      ], 
      "surname": "Qiu", 
      "given_names": "J. F.", 
      "full_name": "Qiu,J. F."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Tsinghua University, China"
        }
      ], 
      "surname": "Qu", 
      "given_names": "S. Q.", 
      "full_name": "Qu,S. Q."
    }, 
    {
      "affiliations": [
        {
          "country": "Pakistan", 
          "value": "University of the Punjab, Pakistan"
        }
      ], 
      "surname": "Rashid", 
      "given_names": "K. H.", 
      "full_name": "Rashid,K. H."
    }, 
    {
      "affiliations": [
        {
          "country": "Germany", 
          "value": "Johannes Gutenberg University of Mainz, Johann-Joachim-Becher-Weg 45, Germany"
        }
      ], 
      "surname": "Redmer", 
      "given_names": "C. F.", 
      "full_name": "Redmer,C. F."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Liaoning Normal University, China"
        }
      ], 
      "surname": "Ren", 
      "given_names": "K. J.", 
      "full_name": "Ren,K. J."
    }, 
    {
      "affiliations": [
        {
          "country": "Italy", 
          "value": "University of Turin and INFN, INFN, I-10125, Italy"
        }
      ], 
      "surname": "Rivetti", 
      "given_names": "A.", 
      "full_name": "Rivetti,A."
    }, 
    {
      "affiliations": [
        {
          "country": "Netherlands", 
          "value": "University of Groningen, NL-9747 AA Groningen, The Netherlands"
        }
      ], 
      "surname": "Rodin", 
      "given_names": "V.", 
      "full_name": "Rodin,V."
    }, 
    {
      "affiliations": [
        {
          "country": "Italy", 
          "value": "University of Turin and INFN, INFN, I-10125, Italy"
        }
      ], 
      "surname": "Rolo", 
      "given_names": "M.", 
      "full_name": "Rolo,M."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Institute of High Energy Physics, China"
        }, 
        {
          "country": "China", 
          "value": "University of Chinese Academy of Sciences, China"
        }
      ], 
      "surname": "Rong", 
      "given_names": "G.", 
      "full_name": "Rong,G."
    }, 
    {
      "affiliations": [
        {
          "country": "Germany", 
          "value": "Helmholtz Institute Mainz, Staudinger Weg 18, Germany"
        }
      ], 
      "surname": "Rosner", 
      "given_names": "Ch.", 
      "full_name": "Rosner,Ch."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Nankai University, China"
        }
      ], 
      "surname": "Ruan", 
      "given_names": "S. N.", 
      "full_name": "Ruan,S. N."
    }, 
    {
      "affiliations": [
        {
          "country": "Russia", 
          "value": "Joint Institute for Nuclear Research, 141980 Dubna, Russia"
        }, 
        {
          "country": "Russia", 
          "value": "Also at the NRC \"Kurchatov Institute\", PNPI, 188300, Russia"
        }
      ], 
      "surname": "Sarantsev", 
      "given_names": "A.", 
      "full_name": "Sarantsev,A."
    }, 
    {
      "affiliations": [
        {
          "country": "Germany", 
          "value": "Johannes Gutenberg University of Mainz, Johann-Joachim-Becher-Weg 45, Germany"
        }
      ], 
      "surname": "Schelhaas", 
      "given_names": "Y.", 
      "full_name": "Schelhaas,Y."
    }, 
    {
      "affiliations": [
        {
          "country": "Germany", 
          "value": "Bochum Ruhr-University, Germany"
        }
      ], 
      "surname": "Schnier", 
      "given_names": "C.", 
      "full_name": "Schnier,C."
    }, 
    {
      "affiliations": [
        {
          "country": "Sweden", 
          "value": "Uppsala University, Box 516, Sweden"
        }
      ], 
      "surname": "Schoenning", 
      "given_names": "K.", 
      "full_name": "Schoenning,K."
    }, 
    {
      "affiliations": [
        {
          "country": "Italy", 
          "value": "INFN Sezione di Ferrara, INFN Sezione di Ferrara, I-44122, Italy"
        }, 
        {
          "country": "Italy", 
          "value": "INFN Sezione di Ferrara, University of Ferrara, I-44122, Italy"
        }
      ], 
      "surname": "Scodeggio", 
      "given_names": "M.", 
      "full_name": "Scodeggio,M."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Fudan University, China"
        }, 
        {
          "country": "China", 
          "value": "Also at Key Laboratory of Nuclear Physics and Ion-beam Application (MOE) and Institute of Modern Physics, Fudan University, China"
        }
      ], 
      "surname": "Shan", 
      "given_names": "K. Y.", 
      "full_name": "Shan,K. Y."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Hunan Normal University, China"
        }
      ], 
      "surname": "Shan", 
      "given_names": "W.", 
      "full_name": "Shan,W."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "University of Science and Technology of China, China"
        }, 
        {
          "country": "China", 
          "value": "State Key Laboratory of Particle Detection and Electronics, Beijing 100049, China"
        }
      ], 
      "surname": "Shan", 
      "given_names": "X. Y.", 
      "full_name": "Shan,X. Y."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Soochow University, China"
        }
      ], 
      "surname": "Shangguan", 
      "given_names": "J. F.", 
      "full_name": "Shangguan,J. F."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Institute of High Energy Physics, China"
        }, 
        {
          "country": "China", 
          "value": "University of Chinese Academy of Sciences, China"
        }
      ], 
      "surname": "Shao", 
      "given_names": "L. G.", 
      "full_name": "Shao,L. G."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "University of Science and Technology of China, China"
        }, 
        {
          "country": "China", 
          "value": "State Key Laboratory of Particle Detection and Electronics, Beijing 100049, China"
        }
      ], 
      "surname": "Shao", 
      "given_names": "M.", 
      "full_name": "Shao,M."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Fudan University, China"
        }, 
        {
          "country": "China", 
          "value": "Also at Key Laboratory of Nuclear Physics and Ion-beam Application (MOE) and Institute of Modern Physics, Fudan University, China"
        }
      ], 
      "surname": "Shen", 
      "given_names": "C. P.", 
      "full_name": "Shen,C. P."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Institute of High Energy Physics, China"
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        {
          "country": "China", 
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    {
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        {
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    {
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        {
          "country": "China", 
          "value": "University of Chinese Academy of Sciences, China"
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          "country": "China", 
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        {
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      "given_names": "H. C.", 
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    {
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        {
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          "value": "Institute of High Energy Physics, China"
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    {
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        {
          "country": "China", 
          "value": "Soochow University, China"
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        {
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          "value": "Institute of High Energy Physics, China"
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        {
          "country": "China", 
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      "given_names": "R. S.", 
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    {
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        {
          "country": "China", 
          "value": "Institute of High Energy Physics, China"
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        {
          "country": "China", 
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    {
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        {
          "country": "China", 
          "value": "Henan Normal University, China"
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      "surname": "Song", 
      "given_names": "J. J.", 
      "full_name": "Song,J. J."
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    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Jilin University, China"
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        {
          "country": "China", 
          "value": "Institute of High Energy Physics, China"
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      "given_names": "W. M.", 
      "full_name": "Song,W. M."
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    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Peking University, China"
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        {
          "country": "China", 
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          "value": "University of Turin and INFN, University of Turin, I-10125, Italy"
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        {
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    {
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        {
          "country": "Italy", 
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        {
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        {
          "country": "Germany", 
          "value": "Johannes Gutenberg University of Mainz, Johann-Joachim-Becher-Weg 45, Germany"
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        {
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    {
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        {
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      "given_names": "Y. J.", 
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    {
      "affiliations": [
        {
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    {
      "affiliations": [
        {
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    {
      "affiliations": [
        {
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    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Henan Normal University, China"
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    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Wuhan University, China"
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      "given_names": "L.", 
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    {
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        {
          "country": "China", 
          "value": "Institute of High Energy Physics, China"
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        {
          "country": "China", 
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    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Institute of High Energy Physics, China"
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        {
          "country": "China", 
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      "given_names": "T.", 
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    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Jilin University, China"
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      "surname": "Sun", 
      "given_names": "W. Y.", 
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    {
      "affiliations": [
        {
          "country": "China", 
          "value": "University of Science and Technology of China, China"
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        {
          "country": "China", 
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      "surname": "Sun", 
      "given_names": "Y. J.", 
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    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Institute of High Energy Physics, China"
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    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Shandong University, China"
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    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Wuhan University, China"
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      "full_name": "Tan,Y. H."
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    {
      "affiliations": [
        {
          "country": "China", 
          "value": "University of Science and Technology of China, China"
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        {
          "country": "China", 
          "value": "State Key Laboratory of Particle Detection and Electronics, Beijing 100049, China"
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      "surname": "Tan", 
      "given_names": "Y. X.", 
      "full_name": "Tan,Y. X."
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    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Sichuan University, China"
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      "surname": "Tang", 
      "given_names": "C. J.", 
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    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Institute of High Energy Physics, China"
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      "given_names": "G. Y.", 
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    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Sun Yat-Sen University, China"
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      ], 
      "surname": "Tang", 
      "given_names": "J.", 
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    {
      "affiliations": [
        {
          "country": "China", 
          "value": "University of South China, China"
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      "surname": "Tao", 
      "given_names": "L. Y.", 
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    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Hunan University, China"
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        {
          "country": "China", 
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      "surname": "Tao", 
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    {
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        {
          "country": "UK", 
          "value": "University of Oxford, Keble Road, United Kingdom"
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    {
      "affiliations": [
        {
          "country": "China", 
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        {
          "country": "China", 
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        {
          "country": "Sweden", 
          "value": "Uppsala University, Box 516, Sweden"
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    {
      "affiliations": [
        {
          "country": "China", 
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    {
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        {
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        {
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    {
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        {
          "country": "Cyprus", 
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    {
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        {
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    {
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        {
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        {
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          "value": "University of South China, China"
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    {
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        {
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        {
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    {
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        {
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        {
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        {
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        {
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    {
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        {
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        {
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        {
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    {
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    {
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        {
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        {
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    {
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    {
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    {
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        {
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    {
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        {
          "country": "China", 
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      ], 
      "surname": "Wang", 
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    {
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        {
          "country": "China", 
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    {
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    {
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        {
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    {
      "affiliations": [
        {
          "country": "Germany", 
          "value": "University of Muenster, Wilhelm-Klemm-Strasse 9, Germany"
        }
      ], 
      "surname": "Weidner", 
      "given_names": "F.", 
      "full_name": "Weidner,F."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Institute of High Energy Physics, China"
        }
      ], 
      "surname": "Wen", 
      "given_names": "S. P.", 
      "full_name": "Wen,S. P."
    }, 
    {
      "affiliations": [
        {
          "country": "UK", 
          "value": "University of Manchester, Oxford Road, Manchester, United Kingdom"
        }
      ], 
      "surname": "White", 
      "given_names": "D. J.", 
      "full_name": "White,D. J."
    }, 
    {
      "affiliations": [
        {
          "country": "Germany", 
          "value": "Bochum Ruhr-University, Germany"
        }
      ], 
      "surname": "Wiedner", 
      "given_names": "U.", 
      "full_name": "Wiedner,U."
    }, 
    {
      "affiliations": [
        {
          "country": "UK", 
          "value": "University of Oxford, Keble Road, United Kingdom"
        }
      ], 
      "surname": "Wilkinson", 
      "given_names": "G.", 
      "full_name": "Wilkinson,G."
    }, 
    {
      "affiliations": [
        {
          "country": "Sweden", 
          "value": "Uppsala University, Box 516, Sweden"
        }
      ], 
      "surname": "Wolke", 
      "given_names": "M.", 
      "full_name": "Wolke,M."
    }, 
    {
      "affiliations": [
        {
          "country": "Germany", 
          "value": "Bochum Ruhr-University, Germany"
        }
      ], 
      "surname": "Wollenberg", 
      "given_names": "L.", 
      "full_name": "Wollenberg,L."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Institute of High Energy Physics, China"
        }, 
        {
          "country": "China", 
          "value": "University of Chinese Academy of Sciences, China"
        }
      ], 
      "surname": "Wu", 
      "given_names": "J. F.", 
      "full_name": "Wu,J. F."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Institute of High Energy Physics, China"
        }
      ], 
      "surname": "Wu", 
      "given_names": "L. H.", 
      "full_name": "Wu,L. H."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Institute of High Energy Physics, China"
        }, 
        {
          "country": "China", 
          "value": "University of Chinese Academy of Sciences, China"
        }
      ], 
      "surname": "Wu", 
      "given_names": "L. J.", 
      "full_name": "Wu,L. J."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Fudan University, China"
        }, 
        {
          "country": "China", 
          "value": "Also at Key Laboratory of Nuclear Physics and Ion-beam Application (MOE) and Institute of Modern Physics, Fudan University, China"
        }
      ], 
      "surname": "Wu", 
      "given_names": "X.", 
      "full_name": "Wu,X."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Jilin University, China"
        }
      ], 
      "surname": "Wu", 
      "given_names": "X. H.", 
      "full_name": "Wu,X. H."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "University of Science and Technology of China, China"
        }
      ], 
      "surname": "Wu", 
      "given_names": "Y.", 
      "full_name": "Wu,Y."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Institute of Modern Physics, Lanzhou 730000, People's Republic of China"
        }
      ], 
      "surname": "J Wu", 
      "given_names": "Y.", 
      "full_name": "J Wu,Y."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Institute of High Energy Physics, China"
        }, 
        {
          "country": "China", 
          "value": "State Key Laboratory of Particle Detection and Electronics, Beijing 100049, China"
        }
      ], 
      "surname": "Wu", 
      "given_names": "Z.", 
      "full_name": "Wu,Z."
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    {
      "affiliations": [
        {
          "country": "China", 
          "value": "University of Science and Technology of China, China"
        }, 
        {
          "country": "China", 
          "value": "State Key Laboratory of Particle Detection and Electronics, Beijing 100049, China"
        }
      ], 
      "surname": "Xia", 
      "given_names": "L.", 
      "full_name": "Xia,L."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Peking University, China"
        }, 
        {
          "country": "China", 
          "value": "Also at State Key Laboratory of Nuclear Physics and Technology, Peking University, China"
        }
      ], 
      "surname": "Xiang", 
      "given_names": "T.", 
      "full_name": "Xiang,T."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Lanzhou University, China"
        }, 
        {
          "country": "China", 
          "value": "Also at Frontiers Science Center for Rare Isotopes, Lanzhou University, China"
        }, 
        {
          "country": "China", 
          "value": "Also at Lanzhou Center for Theoretical Physics, Lanzhou University, China"
        }
      ], 
      "surname": "Xiao", 
      "given_names": "D.", 
      "full_name": "Xiao,D."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Nanjing University, China"
        }
      ], 
      "surname": "Xiao", 
      "given_names": "G. Y.", 
      "full_name": "Xiao,G. Y."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Fudan University, China"
        }, 
        {
          "country": "China", 
          "value": "Also at Key Laboratory of Nuclear Physics and Ion-beam Application (MOE) and Institute of Modern Physics, Fudan University, China"
        }
      ], 
      "surname": "Xiao", 
      "given_names": "H.", 
      "full_name": "Xiao,H."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Institute of High Energy Physics, China"
        }
      ], 
      "surname": "Xiao", 
      "given_names": "S. Y.", 
      "full_name": "Xiao,S. Y."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Fudan University, China"
        }, 
        {
          "country": "China", 
          "value": "Also at Key Laboratory of Nuclear Physics and Ion-beam Application (MOE) and Institute of Modern Physics, Fudan University, China"
        }
      ], 
      "surname": "Xiao", 
      "given_names": "Y. L.", 
      "full_name": "Xiao,Y. L."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Nanjing Normal University, China"
        }
      ], 
      "surname": "Xiao", 
      "given_names": "Z. J.", 
      "full_name": "Xiao,Z. J."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Nanjing University, China"
        }
      ], 
      "surname": "Xie", 
      "given_names": "C.", 
      "full_name": "Xie,C."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Peking University, China"
        }, 
        {
          "country": "China", 
          "value": "Also at State Key Laboratory of Nuclear Physics and Technology, Peking University, China"
        }
      ], 
      "surname": "Xie", 
      "given_names": "X. H.", 
      "full_name": "Xie,X. H."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Shandong University, China"
        }
      ], 
      "surname": "Xie", 
      "given_names": "Y.", 
      "full_name": "Xie,Y."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Institute of High Energy Physics, China"
        }, 
        {
          "country": "China", 
          "value": "State Key Laboratory of Particle Detection and Electronics, Beijing 100049, China"
        }
      ], 
      "surname": "Xie", 
      "given_names": "Y. G.", 
      "full_name": "Xie,Y. G."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Central China Normal University, China"
        }
      ], 
      "surname": "Xie", 
      "given_names": "Y. H.", 
      "full_name": "Xie,Y. H."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "University of Science and Technology of China, China"
        }, 
        {
          "country": "China", 
          "value": "State Key Laboratory of Particle Detection and Electronics, Beijing 100049, China"
        }
      ], 
      "surname": "Xie", 
      "given_names": "Z. P.", 
      "full_name": "Xie,Z. P."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Institute of High Energy Physics, China"
        }, 
        {
          "country": "China", 
          "value": "University of Chinese Academy of Sciences, China"
        }
      ], 
      "surname": "Xing", 
      "given_names": "T. Y.", 
      "full_name": "Xing,T. Y."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Institute of High Energy Physics, China"
        }, 
        {
          "country": "China", 
          "value": "University of Chinese Academy of Sciences, China"
        }
      ], 
      "surname": "Xu", 
      "given_names": "C. F.", 
      "full_name": "Xu,C. F."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Sun Yat-Sen University, China"
        }
      ], 
      "surname": "Xu", 
      "given_names": "C. J.", 
      "full_name": "Xu,C. J."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Institute of High Energy Physics, China"
        }
      ], 
      "surname": "Xu", 
      "given_names": "G. F.", 
      "full_name": "Xu,G. F."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "University of Jinan, China"
        }
      ], 
      "surname": "Xu", 
      "given_names": "H. Y.", 
      "full_name": "Xu,H. Y."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Hangzhou Normal University, China"
        }
      ], 
      "surname": "Xu", 
      "given_names": "Q. J.", 
      "full_name": "Xu,Q. J."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Soochow University, China"
        }
      ], 
      "surname": "Xu", 
      "given_names": "X. P.", 
      "full_name": "Xu,X. P."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Yantai University, China"
        }
      ], 
      "surname": "Xu", 
      "given_names": "Y. C.", 
      "full_name": "Xu,Y. C."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Nanjing University, China"
        }
      ], 
      "surname": "Xu", 
      "given_names": "Z. P.", 
      "full_name": "Xu,Z. P."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Fudan University, China"
        }, 
        {
          "country": "China", 
          "value": "Also at Key Laboratory of Nuclear Physics and Ion-beam Application (MOE) and Institute of Modern Physics, Fudan University, China"
        }
      ], 
      "surname": "Yan", 
      "given_names": "F.", 
      "full_name": "Yan,F."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Fudan University, China"
        }, 
        {
          "country": "China", 
          "value": "Also at Key Laboratory of Nuclear Physics and Ion-beam Application (MOE) and Institute of Modern Physics, Fudan University, China"
        }
      ], 
      "surname": "Yan", 
      "given_names": "L.", 
      "full_name": "Yan,L."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "University of Science and Technology of China, China"
        }, 
        {
          "country": "China", 
          "value": "State Key Laboratory of Particle Detection and Electronics, Beijing 100049, China"
        }
      ], 
      "surname": "Yan", 
      "given_names": "W. B.", 
      "full_name": "Yan,W. B."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Zhengzhou University, China"
        }
      ], 
      "surname": "Yan", 
      "given_names": "W. C.", 
      "full_name": "Yan,W. C."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Shanghai Jiao Tong University, China"
        }, 
        {
          "country": "China", 
          "value": "Also at Key Laboratory for Particle Physics, Astrophysics and Cosmology, Ministry of Education; Shanghai Key Laboratory for Particle Physics and Cosmology; Institute of Nuclear and Particle Physics, China"
        }
      ], 
      "surname": "Yang", 
      "given_names": "H. J.", 
      "full_name": "Yang,H. J."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Jilin University, China"
        }
      ], 
      "surname": "Yang", 
      "given_names": "H. L.", 
      "full_name": "Yang,H. L."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Institute of High Energy Physics, China"
        }
      ], 
      "surname": "Yang", 
      "given_names": "H. X.", 
      "full_name": "Yang,H. X."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Institute of High Energy Physics, China"
        }
      ], 
      "surname": "Yang", 
      "given_names": "Tao", 
      "full_name": "Yang,Tao"
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Nankai University, China"
        }
      ], 
      "surname": "Yang", 
      "given_names": "Y. F.", 
      "full_name": "Yang,Y. F."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Institute of High Energy Physics, China"
        }, 
        {
          "country": "China", 
          "value": "University of Chinese Academy of Sciences, China"
        }
      ], 
      "surname": "Yang", 
      "given_names": "Y. X.", 
      "full_name": "Yang,Y. X."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Institute of High Energy Physics, China"
        }, 
        {
          "country": "China", 
          "value": "University of Chinese Academy of Sciences, China"
        }
      ], 
      "surname": "Yang", 
      "given_names": "Yifan", 
      "full_name": "Yang,Yifan"
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Institute of High Energy Physics, China"
        }, 
        {
          "country": "China", 
          "value": "State Key Laboratory of Particle Detection and Electronics, Beijing 100049, China"
        }
      ], 
      "surname": "Ye", 
      "given_names": "M.", 
      "full_name": "Ye,M."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "China Center of Advanced Science and Technology, China"
        }
      ], 
      "surname": "Ye", 
      "given_names": "M. H.", 
      "full_name": "Ye,M. H."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Institute of High Energy Physics, China"
        }
      ], 
      "surname": "Yin", 
      "given_names": "J. H.", 
      "full_name": "Yin,J. H."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Sun Yat-Sen University, China"
        }
      ], 
      "surname": "You", 
      "given_names": "Z. Y.", 
      "full_name": "You,Z. Y."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Institute of High Energy Physics, China"
        }, 
        {
          "country": "China", 
          "value": "State Key Laboratory of Particle Detection and Electronics, Beijing 100049, China"
        }, 
        {
          "country": "China", 
          "value": "University of Chinese Academy of Sciences, China"
        }
      ], 
      "surname": "Yu", 
      "given_names": "B. X.", 
      "full_name": "Yu,B. X."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Nankai University, China"
        }
      ], 
      "surname": "Yu", 
      "given_names": "C. X.", 
      "full_name": "Yu,C. X."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Institute of High Energy Physics, China"
        }, 
        {
          "country": "China", 
          "value": "University of Chinese Academy of Sciences, China"
        }
      ], 
      "surname": "Yu", 
      "given_names": "G.", 
      "full_name": "Yu,G."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "University of South China, China"
        }
      ], 
      "surname": "Yu", 
      "given_names": "T.", 
      "full_name": "Yu,T."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Peking University, China"
        }, 
        {
          "country": "China", 
          "value": "Also at State Key Laboratory of Nuclear Physics and Technology, Peking University, China"
        }
      ], 
      "surname": "Yu", 
      "given_names": "X. D.", 
      "full_name": "Yu,X. D."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Institute of High Energy Physics, China"
        }, 
        {
          "country": "China", 
          "value": "University of Chinese Academy of Sciences, China"
        }
      ], 
      "surname": "Yuan", 
      "given_names": "C. Z.", 
      "full_name": "Yuan,C. Z."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Beihang University, China"
        }
      ], 
      "surname": "Yuan", 
      "given_names": "L.", 
      "full_name": "Yuan,L."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Institute of High Energy Physics, China"
        }
      ], 
      "surname": "Yuan", 
      "given_names": "S. C.", 
      "full_name": "Yuan,S. C."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Institute of High Energy Physics, China"
        }
      ], 
      "surname": "Yuan", 
      "given_names": "X. Q.", 
      "full_name": "Yuan,X. Q."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Institute of High Energy Physics, China"
        }, 
        {
          "country": "China", 
          "value": "University of Chinese Academy of Sciences, China"
        }
      ], 
      "surname": "Yuan", 
      "given_names": "Y.", 
      "full_name": "Yuan,Y."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Sun Yat-Sen University, China"
        }
      ], 
      "surname": "Yuan", 
      "given_names": "Z. Y.", 
      "full_name": "Yuan,Z. Y."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Liaoning Normal University, China"
        }
      ], 
      "surname": "Yue", 
      "given_names": "C. X.", 
      "full_name": "Yue,C. X."
    }, 
    {
      "affiliations": [
        {
          "country": "Pakistan", 
          "value": "University of the Punjab, Pakistan"
        }
      ], 
      "surname": "Zafar", 
      "given_names": "A. A.", 
      "full_name": "Zafar,A. A."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Shandong University, China"
        }
      ], 
      "surname": "Zeng", 
      "given_names": "F. R.", 
      "full_name": "Zeng,F. R."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Central China Normal University, China"
        }
      ], 
      "surname": "Zeng", 
      "given_names": "X.", 
      "full_name": "Zeng,X."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Hunan University, China"
        }, 
        {
          "country": "China", 
          "value": "Also at School of Physics and Electronics, Hunan University, China"
        }
      ], 
      "surname": "Zeng", 
      "given_names": "Y.", 
      "full_name": "Zeng,Y."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Jilin University, China"
        }
      ], 
      "surname": "Zhai", 
      "given_names": "X. Y.", 
      "full_name": "Zhai,X. Y."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Sun Yat-Sen University, China"
        }
      ], 
      "surname": "Zhan", 
      "given_names": "Y. H.", 
      "full_name": "Zhan,Y. H."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Institute of High Energy Physics, China"
        }, 
        {
          "country": "China", 
          "value": "University of Chinese Academy of Sciences, China"
        }
      ], 
      "surname": "Zhang", 
      "given_names": "A. Q.", 
      "full_name": "Zhang,A. Q."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Institute of High Energy Physics, China"
        }, 
        {
          "country": "China", 
          "value": "University of Chinese Academy of Sciences, China"
        }
      ], 
      "surname": "Zhang", 
      "given_names": "B. L.", 
      "full_name": "Zhang,B. L."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Institute of High Energy Physics, China"
        }
      ], 
      "surname": "Zhang", 
      "given_names": "B. X.", 
      "full_name": "Zhang,B. X."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Nankai University, China"
        }
      ], 
      "surname": "Zhang", 
      "given_names": "D. H.", 
      "full_name": "Zhang,D. H."
    }, 
    {
      "affiliations": [
        {
          "country": "China", 
          "value": "Henan Normal University, China"
        }
      ], 
      "surname": "Zhang", 
      "given_names": "G. Y.", 
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    {
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        {
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    {
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        {
          "country": "China", 
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    {
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    {
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        {
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        {
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    {
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        {
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        {
          "country": "China", 
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      "surname": "Zhang", 
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    {
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        {
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    {
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        {
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    {
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        {
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    {
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        {
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      "affiliations": [
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    {
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        {
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        {
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    {
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    {
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  ], 
  "titles": [
    {
      "source": "IOP", 
      "title": "Search for hidden-charm tetraquark with strangeness in   "
    }
  ], 
  "dois": [
    {
      "value": "10.1088/1674-1137/acac69"
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  "publication_info": [
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      "journal_title": "Chinese Physics C", 
      "material": "article", 
      "journal_volume": "47", 
      "artid": "033001", 
      "year": 2023, 
      "journal_issue": "3"
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  "acquisition_source": {
    "date": "2023-06-06T03:30:57.500298", 
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    "submission_number": "6ab8f560041a11ee8e62c23b20d38f61"
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      "url": "http://creativecommons.org/licenses/by/3.0/", 
      "license": "CC-BY-3.0"
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  "copyright": [
    {
      "statement": "\u00a9 2023 Chinese Physical Society and the Institute of High Energy Physics of the Chinese Academy of Sciences and the Institute of Modern Physics of the Chinese Academy of Sciences and IOP Publishing Ltd", 
      "year": "2023"
    }
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  "control_number": "75492", 
  "record_creation_date": "2023-02-03T03:30:28.628528", 
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  "collections": [
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      "primary": "Chinese Physics C"
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  "arxiv_eprints": [
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        "hep-ex"
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      "value": "2211.12060"
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  ], 
  "abstracts": [
    {
      "source": "IOP", 
      "value": "We report a search for a heavier partner of the recently observed   $ Z_{cs}(3985)^{-} $   state, denoted as   $ Z_{cs}(3985)^{-} $  , in the process   $ Z_{cs}(3985)^{-} $  , based on   $ Z_{cs}(3985)^{-} $   collision data collected at the center-of-mass energies of   $ Z_{cs}(3985)^{-} $  , 4.682 and 4.699 GeV with the BESIII detector. The   $ Z_{cs}(3985)^{-} $   is of interest as it is expected to be a candidate for a hidden-charm and open-strange tetraquark. A partial-reconstruction technique is used to isolate   $ Z_{cs}(3985)^{-} $   recoil-mass spectra, which are probed for a potential contribution from   $ Z_{cs}(3985)^{-} $   (  $ Z_{cs}(3985)^{-} $  ). We find an excess of   $ Z_{cs}(3985)^{-} $   (  $ Z_{cs}(3985)^{-} $  ) candidates with a significance of   $ Z_{cs}(3985)^{-} $  , after considering systematic uncertainties, at a mass of   $ Z_{cs}(3985)^{-} $  . As the data set is limited in size, the upper limits are evaluated at the 90% confidence level on the product of the Born cross sections (  $ Z_{cs}(3985)^{-} $  ) and the branching fraction (  $ Z_{cs}(3985)^{-} $  ) of   $ Z_{cs}(3985)^{-} $  , under different assumptions of the   $ Z_{cs}(3985)^{-} $   mass from 4.120 to 4.140 MeV and of the width from 10 to 50 MeV at the three center-of-mass energies. The upper limits of   $ Z_{cs}(3985)^{-} $   are found to be at the level of   $ Z_{cs}(3985)^{-} $   pb at each energy. Larger data samples are needed to confirm the   $ Z_{cs}(3985)^{-} $   state and clarify its nature in the coming years."
    }
  ], 
  "imprints": [
    {
      "date": "2023-03-01", 
      "publisher": "IOP"
    }
  ]
}
Published on:
01 March 2023
Publisher:
IOP
Published in:
Chinese Physics C , Volume 47 (2023)
Issue 3
Article ID: 033001
DOI:
https://doi.org/10.1088/1674-1137/acac69
arXiv:
2211.12060
Copyrights:
© 2023 Chinese Physical Society and the Institute of High Energy Physics of the Chinese Academy of Sciences and the Institute of Modern Physics of the Chinese Academy of Sciences and IOP Publishing Ltd
Licence:
CC-BY-3.0

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