Observation and study of the decay J/ψ→ϕηη′

作     者：M. Ablikim M. N. Achasov S. Ahmed M. Albrecht M. Alekseev A. Amoroso F. F. An Q. An J. Z. Bai Y. Bai O. Bakina R. Baldini Ferroli Y. Ban K. Begzsuren D. W. Bennett J. V. Bennett N. Berger M. Bertani D. Bettoni F. Bianchi E. Boger I. Boyko R. A. Briere H. Cai X. Cai O. Cakir A. Calcaterra G. F. Cao S. A. Cetin J. Chai J. F. Chang G. Chelkov G. Chen H. S. Chen J. C. Chen M. L. Chen P. L. Chen S. J. Chen X. R. Chen Y. B. Chen W. Cheng X. K. Chu G. Cibinetto F. Cossio H. L. Dai J. P. Dai A. Dbeyssi D. Dedovich Z. Y. Deng A. Denig I. Denysenko M. Destefanis F. De Mori Y. Ding C. Dong J. Dong L. Y. Dong M. Y. Dong Z. L. Dou S. X. Du P. F. Duan J. Fang S. S. Fang Y. Fang R. Farinelli L. Fava S. Fegan F. Feldbauer G. Felici C. Q. Feng E. Fioravanti M. Fritsch C. D. Fu Q. Gao X. L. Gao Y. Gao Y. G. Gao Z. Gao B. Garillon I. Garzia A. Gilman K. Goetzen L. Gong W. X. Gong W. Gradl M. Greco M. H. Gu Y. T. Gu A. Q. Guo R. P. Guo Y. P. Guo A. Guskov Z. Haddadi S. Han X. Q. Hao F. A. Harris K. L. He X. Q. He F. H. Heinsius T. Held Y. K. Heng Z. L. Hou H. M. Hu J. F. Hu T. Hu Y. Hu G. S. Huang J. S. Huang X. T. Huang X. Z. Huang Z. L. Huang T. Hussain W. Ikegami Andersson M. Irshad Q. Ji Q. P. Ji X. B. Ji X. L. Ji X. S. Jiang X. Y. Jiang J. B. Jiao Z. Jiao D. P. Jin S. Jin Y. Jin T. Johansson A. Julin N. Kalantar-Nayestanaki X. S. Kang M. Kavatsyuk B. C. Ke I. K. Keshk T. Khan A. Khoukaz P. Kiese R. Kiuchi R. Kliemt L. Koch O. B. Kolcu B. Kopf M. Kornicer M. Kuemmel M. Kuessner A. Kupsc M. Kurth W. Kühn J. S. Lange P. Larin L. Lavezzi H. Leithoff C. Li Cheng Li D. M. Li F. Li F. Y. Li G. Li H. B. Li H. J. Li J. C. Li J. W. Li Jin Li K. J. Li Kang Li Ke Li Lei Li P. L. Li P. R. Li Q. Y. Li W. D. Li W. G. Li X. L. Li X. N. Li X. Q. Li Z. B. Li H. Liang Y. F. Liang Y. T. Liang G. R. Liao L. Z. Liao J. Libby C. X. Lin D. X. Lin B. Liu B. J. Liu C. X. Liu D. Liu D. Y. Liu F. H. Liu Fang Liu Feng Liu H. B. Liu H. L. Liu H. M. Liu Huanhuan Liu Huihui Liu J. B. Liu J. Y. Liu K. Liu K. Y. Liu Ke Liu L. D. Liu Q. Liu S. B. Liu X. Liu Y. B. Liu Z. A. Liu Zhiqing Liu Y. F. Long X. C. Lou H. J. Lu J. G. Lu Y. Lu Y. P. Lu C. L. Luo M. X. Luo T. Luo X. L. Luo S. Lusso X. R. Lyu F. C. Ma H. L. Ma L. L. Ma M. M. Ma Q. M. Ma T. Ma X. N. Ma X. Y. Ma Y. M. Ma F. E. Maas M. Maggiora S. Maldaner Q. A. Malik A. Mangoni Y. J. Mao Z. P. Mao S. Marcello Z. X. Meng J. G. Messchendorp G. Mezzadri J. Min R. E. Mitchell X. H. Mo Y. J. Mo C. Morales Morales N. Yu. Muchnoi H. Muramatsu A. Mustafa Y. Nefedov F. Nerling I. B. Nikolaev Z. Ning S. Nisar S. L. Niu X. Y. Niu S. L. Olsen Q. Ouyang S. Pacetti Y. Pan M. Papenbrock P. Patteri M. Pelizaeus J. Pellegrino H. P. Peng Z. Y. Peng K. Peters J. Pettersson J. L. Ping R. G. Ping A. Pitka R. Poling V. Prasad H. R. Qi M. Qi T. Y. Qi S. Qian C. F. Qiao N. Qin X. S. Qin Z. H. Qin J. F. Qiu S. Q. Qu K. H. Rashid C. F. Redmer M. Richter M. Ripka A. Rivetti M. Rolo G. Rong Ch. Rosner A. Sarantsev M. Savrié K. Schoenning W. Shan X. Y. Shan M. Shao C. P. Shen P. X. Shen X. Y. Shen H. Y. Sheng X. Shi J. J. Song W. M. Song X. Y. Song S. Sosio C. Sowa S. Spataro G. X. Sun J. F. Sun L. Sun S. S. Sun X. H. Sun Y. J. Sun Y. K. Sun Y. Z. Sun Z. J. Sun Z. T. Sun Y. T. Tan C. J. Tang G. Y. Tang X. Tang I. Tapan M. Tiemens B. Tsednee I. Uman B. Wang B. L. Wang D. Wang D. Y. Wang Dan Wang K. Wang L. L. Wang L. S. Wang M. Wang Meng Wang P. Wang P. L. Wang W. P. Wang X. F. Wang X. L. Wang Y. Wang Y. F. Wang Z. Wang Z. G. Wang Z. Y. Wang Zongyuan Wang T. Weber D. H. Wei P. Weidenkaff S. P. Wen U. Wiedner M. Wolke L. H. Wu L. J. Wu Z. Wu L. Xia Y. Xia D. Xiao Y. J. Xiao Z. J. Xiao Y. G. Xie Y. H. Xie X. A. Xiong Q. L. Xiu G. F. Xu J. J. Xu L. Xu Q. J. Xu Q. N. Xu X. P. Xu F. Yan L. Yan W. B. Yan W. C. Yan Y. H. Yan H. J. Yang H. X. Yang L. Yang R. X. Yang Y. H. Yang Y. X. Yang Yifan Yang Z. Q. Yang M. Ye M. H. Ye J. H. Yin Z. Y. You B. X. Yu C. X. Yu J. S. Yu C. Z. Yuan Y. Yuan A. Yuncu A. A. Zafar Y. Zeng B. X. Zhang B. Y. Zhang C. C. Zhang D. H. Zhang H. H. Zhang H. Y. Zhang J. Zhang J. L. Zhang J. Q. Zhang J. W. Zhang J. Y. Zhang J. Z. Zhang K. Zhang L. Zhang T. J. Zhang X. Y. Zhang Y. Zhang Y. H. Zhang Y. T. Zhang Yang Zhang Yao Zhang Yi Zhang Yu Zhang Z. H. Zhang Z. P. Zhang Z. Y. Zhang G. Zhao J. W. Zhao J. Y. Zhao J. Z. Zhao Lei Zhao Ling Zhao M. G. Zhao Q. Zhao S. J. Zhao T. C. Zhao Y. B. Zhao Z. G. Zhao A. Zhemchugov B. Zheng J. P. Zheng Y. H. Zheng B. Zhong L. Zhou Q. Zhou X. Zhou X. K. Zhou X. R. Zhou X. Y. Zhou Xiaoyu Zhou Xu Zhou A. N. Zhu J. Zhu K. Zhu K. J. Zhu S. Zhu S. H. Zhu X. L. Zhu Y. C. Zhu Y. S. Zhu Z. A. Zhu J. Zhuang B. S. Zou J. H. Zou 

作者机构：Institute of High Energy Physics Beijing 100049 People’s Republic of China G.I. Budker Institute of Nuclear Physics SB RAS (BINP) Novosibirsk 630090 Russia Helmholtz Institute Mainz Johann-Joachim-Becher-Weg 45 D-55099 Mainz Germany Bochum Ruhr-University D-44780 Bochum Germany University of Turin I-10125 Turin Italy INFN I-10125 Turin Italy University of Science and Technology of China Hefei 230026 People’s Republic of China State Key Laboratory of Particle Detection and Electronics Beijing 100049 Hefei 230026 People’s Republic of China Southeast University Nanjing 211100 People’s Republic of China Joint Institute for Nuclear Research 141980 Dubna Moscow region Russia INFN Laboratori Nazionali di Frascati I-00044 Frascati Italy Peking University Beijing 100871 People’s Republic of China Institute of Physics and Technology Peace Ave. 54B Ulaanbaatar 13330 Mongolia Indiana University Bloomington Indiana 47405 USA Carnegie Mellon University Pittsburgh Pennsylvania 15213 USA Johannes Gutenberg University of Mainz Johann-Joachim-Becher-Weg 45 D-55099 Mainz Germany INFN Sezione di Ferrara I-44122 Ferrara Italy Wuhan University Wuhan 430072 People’s Republic of China Ankara University 06100 Tandogan Ankara Turkey University of Chinese Academy of Sciences Beijing 100049 People’s Republic of China Istanbul Bilgi University 34060 Eyup Istanbul Turkey University of South China Hengyang 421001 People’s Republic of China Nanjing University Nanjing 210093 People’s Republic of China Lanzhou University Lanzhou 730000 People’s Republic of China Shanghai Jiao Tong University Shanghai 200240 People’s Republic of China Liaoning University Shenyang 110036 People’s Republic of China Nankai University Tianjin 300071 People’s Republic of China Zhengzhou University Zhengzhou 450001 People’s Republic of China University of Ferrara I-44122 Ferrara Italy University of Eastern Piedmont I-15121 Alessandria Italy Tsinghua University Beijing 100084 People’s Republic of China Central China Normal University Wuhan 430079 People’s Republic of China University of Minnesota Minneapolis Minnesota 55455 USA GSI Helmholtzcentre for Heavy Ion Research GmbH D-64291 Darmstadt Germany Guangxi University Nanning 530004 People’s Republic of China KVI-CART University of Groningen NL-9747 AA Groningen Netherlands Henan Normal University Xinxiang 453007 People’s Republic of China University of Hawaii Honolulu Hawaii 96822 USA University of Science and Technology Liaoning Anshan 114051 People’s Republic of China Shandong University Jinan 250100 People’s Republic of China University of the Punjab Lahore-54590 Pakistan Uppsala University Box 516 SE-75120 Uppsala Sweden Huangshan College Huangshan 245000 People’s Republic of China University of Jinan Jinan 250022 People’s Republic of China University of Muenster Wilhelm-Klemm-Str. 9 48149 Muenster Germany Justus-Liebig-Universitaet Giessen II. Physikalisches Institut Heinrich-Buff-Ring 16 D-35392 Giessen Germany Soochow University Suzhou 215006 People’s Republic of China Seoul National University Seoul 151-747 Korea Sun Yat-Sen University Guangzhou 510275 People’s Republic of China Hangzhou Normal University Hangzhou 310036 People’s Republic of China Beijing Institute of Petrochemical Technology Beijing 102617 People’s Republic of China China Center of Advanced Science and Technology Beijing 100190 People’s Republic of China Sichuan University Chengdu 610064 People’s Republic of China Guangxi Normal University Guilin 541004 People’s Republic of China Indian Institute of Technology Madras Chennai 600036 India Shanxi University Taiyuan 030006 People’s Republic of China Henan University of Science and Technology Luoyang 471003 People’s Republic of China Nanjing Normal University Nanjing 210023 People’s Republic of China Zhejiang University Hangzhou 310027 People’s Republic of China Fudan University Shanghai 200443 People’s Republic of China INFN and University of Perugia I-06100 Perugia Italy COMSATS Institute of Information Technology Lahore Defence Road Off Raiwind Road 54000 Lahore Pakistan Beihang University Beijing 100191 People’s Republic of China Hunan Normal University Changsha 410081 People’s Republic of China Uludag University 16059 Bursa Turkey Near East University Nicosia North Cyprus Mersin 10 Turkey Hunan University Changsha 410082 People’s Republic of China Xinyang Normal University Xinyang 464000 People’s Republic of China 

出 版 物：《Physical Review D》 (Phy. Rev. D)

年 卷 期：2019年第99卷第11期

页      面：112008-112008页

核心收录：

基　　金：CAS Key Research Program of Frontier Sciences, (QYZDJ-SSW-SLH003, QYZDJ-SSW-SLH040) German Research Foundation DFG, (CRC 1044) Ministry of Development of Turkey, (DPT2006K-120470) National Key Basic Research Program of China, (2015CB856700) National Science and Technology fund RuG U.S. Department of Energy, USDOE, (DE-FG02-05ER41374, DE-SC-0010118, DE-SC-0010504, DE-SC-0012069) U.S. Department of Energy, USDOE Rijksuniversiteit Groningen Koninklijke Nederlandse Akademie van Wetenschappen, KNAW, (530-4CDP03) Koninklijke Nederlandse Akademie van Wetenschappen, KNAW National Natural Science Foundation of China, NSFC, (11335008, 11425524, 11625523, 11635010, 11735014) National Natural Science Foundation of China, NSFC Chinese Academy of Sciences, CAS Vetenskapsrådet, VR Institute for Basic Science, IBS, (IBS-R016-D1) Institute for Basic Science, IBS GSI Helmholtzzentrum für Schwerionenforschung GmbH, GSI Istituto Nazionale di Fisica Nucleare, INFN CAS Center for Excellence in Particle Physics, CCEPP, (U1532257, U1532258, U1832207) CAS Center for Excellence in Particle Physics, CCEPP Shanghai Key Laboratory for Particle Physics and Cosmology, SKLPPC 

主　　题：Exotic mesons Lepton colliders 

摘      要：We report the observation and study of the decay J/ψ→ϕηη′ using 1.3×109 J/ψ events collected with the BESIII detector. Its branching fraction, including all possible intermediate states, is measured to be (2.32±0.06±0.16)×10−4. We also report evidence for a structure, denoted as X, in the ϕη′ mass spectrum in the 2.0–2.1 GeV/c2 region. Using two decay modes of the η′ meson (γπ+π− and ηπ+π−), a simultaneous fit to the ϕη′ mass spectra is performed. Assuming the quantum numbers of the X to be JP=1−, its significance is found to be 4.4σ, with a mass and width of (2002.1±27.5±21.4) MeV/c2 and (129±17±9) MeV, respectively, and a product branching fraction B(J/ψ→ηX)×B(X→ϕη′)=(9.8±1.2±1.7)×10−5. Alternatively, assuming JP=1+, the significance is 3.8σ, with a mass and width of (2062.8±13.1±7.2) MeV/c2 and (177±36±35) MeV, respectively, and a product branching fraction B(J/ψ→ηX)×B(X→ϕη′)=(9.6±1.4±2.0)×10−5. The angular distribution of J/ψ→ηX is studied and the two JP assumptions of the X cannot be clearly distinguished due to the limited statistics. In all measurements the first uncertainties are statistical and the second systematic.