Observation of η′→π+π−μ+μ−

作     者：M. Ablikim M. N. Achasov P. Adlarson S. Ahmed M. Albrecht A. Amoroso Q. An X. H. Bai Y. Bai O. Bakina R. Baldini Ferroli I. Balossino Y. Ban K. Begzsuren J. V. Bennett N. Berger M. Bertani D. Bettoni F. Bianchi J. Biernat J. Bloms A. Bortone I. Boyko R. A. Briere H. Cai X. Cai A. Calcaterra G. F. Cao N. Cao S. A. Cetin J. F. Chang W. L. Chang G. Chelkov D. Y. Chen G. Chen H. S. Chen M. L. Chen S. J. Chen X. R. Chen Y. B. Chen W. S. Cheng G. Cibinetto F. Cossio X. F. Cui H. L. Dai J. P. Dai X. C. Dai A. Dbeyssi R. E. de Boer 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 S. X. Du J. Fang S. S. Fang Y. Fang R. Farinelli L. Fava F. Feldbauer G. Felici C. Q. Feng M. Fritsch C. D. Fu Y. Fu X. L. Gao Y. Gao Y. G. Gao I. Garzia E. M. Gersabeck A. Gilman K. Goetzen L. Gong W. X. Gong W. Gradl M. Greco L. M. Gu M. H. Gu S. Gu Y. T. Gu C. Y. Guan A. Q. Guo L. B. Guo R. P. Guo Y. P. Guo A. Guskov S. Han T. T. Han T. Z. Han X. Q. Hao F. A. Harris N. Hüsken K. L. He F. H. Heinsius T. Held Y. K. Heng M. Himmelreich T. Holtmann Y. R. Hou Z. L. Hou H. M. Hu J. F. Hu T. Hu Y. Hu G. S. Huang L. Q. Huang X. T. Huang Y. P. Huang Z. Huang T. Hussain W. Ikegami Andersson W. Imoehl M. Irshad S. Jaeger S. Janchiv Q. Ji Q. P. Ji X. B. Ji X. L. Ji Y. Y. Ji H. B. Jiang X. S. Jiang J. B. Jiao Z. Jiao S. Jin Y. Jin T. Johansson N. Kalantar-Nayestanaki X. S. Kang R. Kappert M. Kavatsyuk B. C. Ke I. K. Keshk A. Khoukaz P. Kiese R. Kiuchi R. Kliemt L. Koch O. B. Kolcu B. Kopf M. Kuemmel M. Kuessner A. Kupsc M. G. Kurth W. Kühn J. J. Lane J. S. Lange P. Larin A. Lavania L. Lavezzi H. Leithoff M. Lellmann T. Lenz C. Li C. H. Li Cheng Li D. M. Li F. Li G. Li H. Li H. B. Li H. J. Li J. L. Li J. Q. Li Ke Li L. K. Li Lei Li P. L. Li P. R. Li S. Y. Li W. D. Li W. G. Li X. H. Li X. L. Li Z. Y. Li H. Liang Y. F. Liang Y. T. Liang G. R. Liao L. Z. Liao J. Libby C. 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. M. Liu Huanhuan Liu Huihui Liu J. B. Liu J. Y. Liu K. Liu K. Y. Liu Ke Liu L. Liu Q. Liu S. B. Liu Shuai Liu T. Liu W. M. Liu X. Liu Y. B. Liu Z. A. Liu Z. Q. Liu Y. F. Long X. C. Lou F. X. Lu H. J. Lu J. D. Lu J. G. Lu X. L. Lu Y. Lu Y. P. Lu C. L. Luo M. X. Luo P. W. 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 R. Q. Ma R. T. Ma X. N. Ma X. X. Ma X. Y. Ma Y. M. Ma F. E. Maas M. Maggiora S. Maldaner S. Malde A. Mangoni Y. J. Mao Z. P. Mao S. Marcello Z. X. Meng J. G. Messchendorp G. Mezzadri T. J. Min R. E. Mitchell X. H. Mo Y. J. Mo N. Yu. Muchnoi H. Muramatsu S. Nakhoul Y. Nefedov F. Nerling I. B. Nikolaev Z. Ning S. Nisar S. L. Olsen Q. Ouyang S. Pacetti X. Pan Y. Pan A. Pathak P. Patteri M. Pelizaeus H. P. Peng K. Peters J. Pettersson J. L. Ping R. G. Ping A. Pitka R. Poling V. Prasad H. Qi H. R. Qi M. Qi T. Y. Qi S. Qian W. B. Qian Z. Qian C. F. Qiao L. Q. Qin X. S. Qin Z. H. Qin J. F. Qiu S. Q. Qu K. Ravindran C. F. Redmer A. Rivetti V. Rodin M. Rolo G. Rong Ch. Rosner M. Rump A. Sarantsev Y. Schelhaas C. Schnier K. Schoenning D. C. Shan W. Shan X. Y. Shan M. Shao C. P. Shen P. X. Shen X. Y. Shen H. C. Shi R. S. Shi X. Shi X. D. Shi J. J. Song Q. Q. Song W. M. Song Y. X. Song S. Sosio S. Spataro F. F. Sui G. X. Sun J. F. Sun L. Sun S. S. Sun T. Sun W. Y. Sun X. Sun Y. J. Sun Y. K. Sun Y. Z. Sun Z. T. Sun Y. H. Tan Y. X. Tan C. J. Tang G. Y. Tang J. Tang J. X. Teng V. Thoren I. Uman B. Wang B. L. Wang C. W. Wang D. Y. Wang H. P. Wang K. Wang L. L. Wang M. Wang M. Z. Wang Meng Wang W. H. Wang W. P. Wang X. Wang X. F. Wang X. L. Wang Y. Wang Y. D. Wang Y. F. Wang Y. Q. Wang Z. Wang Z. Y. Wang Ziyi Wang Zongyuan Wang D. H. Wei P. Weidenkaff F. Weidner S. P. Wen D. J. White U. Wiedner G. Wilkinson M. Wolke L. Wollenberg J. F. Wu L. H. Wu L. J. Wu X. Wu Z. Wu L. Xia H. Xiao S. Y. Xiao Y. J. Xiao Z. J. Xiao X. H. Xie Y. G. Xie Y. H. Xie T. Y. Xing X. A. Xiong G. F. Xu J. J. Xu Q. J. Xu W. Xu X. P. Xu Y. C. Xu F. Yan L. Yan W. B. Yan W. C. Yan Xu Yan H. J. Yang H. X. Yang L. Yang R. X. Yang S. L. Yang Y. H. Yang Y. X. Yang Yifan Yang Zhi Yang M. Ye M. H. Ye J. H. Yin Z. Y. You B. X. Yu C. X. Yu G. Yu J. S. Yu T. Yu C. Z. Yuan W. Yuan X. Q. Yuan Y. Yuan Z. Y. Yuan C. X. Yue A. Yuncu A. A. Zafar Y. Zeng B. X. Zhang Guangyi Zhang H. Zhang H. H. Zhang H. Y. Zhang J. L. Zhang J. Q. Zhang J. W. Zhang J. Y. Zhang J. Z. Zhang Jianyu Zhang Jiawei Zhang Lei Zhang S. Zhang S. F. Zhang T. J. Zhang X. Y. Zhang Y. Zhang Y. H. Zhang Y. T. Zhang Yan Zhang Yao Zhang Yi Zhang Z. H. Zhang Z. Y. Zhang G. Zhao J. Zhao J. Y. Zhao J. Z. Zhao Lei Zhao Ling Zhao M. G. Zhao Q. Zhao S. J. Zhao Y. B. Zhao Y. X. Zhao Z. G. Zhao A. Zhemchugov B. Zheng J. P. Zheng Y. Zheng Y. H. Zheng B. Zhong C. Zhong L. P. Zhou Q. Zhou X. Zhou X. K. Zhou X. R. Zhou A. N. Zhu J. Zhu K. Zhu K. J. Zhu S. H. Zhu W. J. Zhu Y. C. Zhu Z. A. Zhu 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 Uppsala University Box 516 SE-75120 Uppsala Sweden Helmholtz Institute Mainz Johann-Joachim-Becher-Weg 45 D-55099 Mainz Germany Bochum Ruhr-University D-44780 Bochum Germany University of Turin and INFN 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 University of Jinan Jinan 250022 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 INFN Sezione di Ferrara I-44122 Ferrara Italy Peking University Beijing 100871 People’s Republic of China Institute of Physics and Technology Peace Ave. 54B Ulaanbaatar 13330 Mongolia Carnegie Mellon University Pittsburgh Pennsylvania 15213 USA Johannes Gutenberg University of Mainz Johann-Joachim-Becher-Weg 45 D-55099 Mainz Germany University of Muenster Wilhelm-Klemm-Str. 9 48149 Muenster Germany Wuhan University Wuhan 430072 People’s Republic of China University of Chinese Academy of Sciences Beijing 100049 People’s Republic of China Turkish Accelerator Center Particle Factory Group Istanbul Bilgi University 34060 Eyup Istanbul Turkey Central China Normal University Wuhan 430079 People’s Republic of China Nanjing University Nanjing 210093 People’s Republic of China Institute of Modern Physics Lanzhou 730000 People’s Republic of China Nankai University Tianjin 300071 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 Zhengzhou University Zhengzhou 450001 People’s Republic of China University of Eastern Piedmont I-15121 Alessandria Italy University of Ferrara I-44122 Ferrara Italy University of Manchester Oxford Road Manchester M13 9PL United Kingdom University of Minnesota Minneapolis Minnesota 55455 USA GSI Helmholtzcentre for Heavy Ion Research GmbH D-64291 Darmstadt Germany Beihang University Beijing 100191 People’s Republic of China Guangxi University Nanning 530004 People’s Republic of China Indiana University Bloomington Indiana 47405 USA Nanjing Normal University Nanjing 210023 People’s Republic of China Shandong Normal University Jinan 250014 People’s Republic of China Fudan University Shanghai 200443 People’s Republic of China Shandong University Jinan 250100 People’s Republic of China Henan Normal University Xinxiang 453007 People’s Republic of China University of Hawaii Honolulu Hawaii 96822 USA University of South China Hengyang 421001 People’s Republic of China University of the Punjab Lahore-54590 Pakistan Huangshan College Huangshan 245000 People’s Republic of China University of Groningen NL-9747 AA Groningen Netherlands Shanxi Normal University Linfen 041004 People’s Republic of China Justus-Liebig-Universitaet Giessen II. Physikalisches Institut Heinrich-Buff-Ring 16 D-35392 Giessen Germany Indian Institute of Technology Madras Chennai 600036 India Qufu Normal University Qufu 273165 People’s Republic of China Liaoning Normal University Dalian 116029 People’s Republic of China Beijing Institute of Petrochemical Technology Beijing 102617 People’s Republic of China Lanzhou University Lanzhou 730000 People’s Republic of China Tsinghua University Beijing 100084 People’s Republic of China Sun Yat-Sen University Guangzhou 510275 People’s Republic of China Sichuan University Chengdu 610064 People’s Republic of China Guangxi Normal University Guilin 541004 People’s Republic of China Shanxi University Taiyuan 030006 People’s Republic of China Henan University of Science and Technology Luoyang 471003 People’s Republic of China Soochow University Suzhou 215006 People’s Republic of China Zhejiang University Hangzhou 310027 People’s Republic of China University of Oxford Keble Rd Oxford United Kingdom OX13RH INFN Sezione di Perugia I-06100 Perugia Italy COMSATS University Islamabad Lahore Campus Defence Road Off Raiwind Road 54000 Lahore Pakistan University of Perugia I-06100 Perugia Italy Hunan Normal University Changsha 410081 People’s Republic of China Jilin University Changchun 130012 People’s Republic of China Hunan University Changsha 410082 People’s Republic of China Near East University Nicosia North Cyprus Mersin 10 Turkey Hangzhou Normal University Hangzhou 310036 People’s Republic of China China Center of Advanced Science and Technology Beijing 100190 People’s Republic of China Xinyang Normal University Xinyang 464000 People’s Republic of China University of Science and Technology Liaoning Anshan 114051 People’s Republic of China 

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

年 卷 期：2021年第103卷第7期

页      面：072006-072006页

核心收录：

基　　金：CAS Key Research Program of Frontier Sciences, (QYZDJ-SSW-SLH003, QYZDJ-SSW-SLH040) INPAC Ministry of Development of Turkey, (DPT2006K-120470) National Science and Technology fund Olle Engkvist Foundation, (200-0605) U.S. Department of Energy, USDOE, (DE-FG02-05ER41374, DE-SC-0012069) U.S. Department of Energy, USDOE Horizon 2020 Framework Programme, H2020, (758462) Horizon 2020 Framework Programme, H2020 Science and Technology Facilities Council, STFC Royal Society, (DH140054, DH160214) Royal Society European Research Council, ERC Deutsche Forschungsgemeinschaft, DFG, (CRC 1044, GRK 214) Deutsche Forschungsgemeinschaft, DFG National Natural Science Foundation of China, NSFC, (11625523, 11635010, 11675184, 11735014, 11822506, 11835012, 11935015, 11935016, 11935018) National Natural Science Foundation of China, NSFC Chinese Academy of Sciences, CAS, (U1632107, U1732263, U1832207) Chinese Academy of Sciences, CAS Instituto Nazionale di Fisica Nucleare, INFN Knut och Alice Wallenbergs Stiftelse, (2016.0157) Knut och Alice Wallenbergs Stiftelse Vetenskapsrådet, VR National Key Research and Development Program of China, NKRDPC, (2015CB856700) National Key Research and Development Program of China, NKRDPC Shanghai Key Laboratory for Particle Physics and Cosmology, SKLPPC 

主　　题：Branching fraction 

摘      要：Using (1310.6±7.0)×106 J/ψ events acquired with the BESIII detector at the BEPCII storage rings, the decay η′→π+π−μ+μ− is observed for the first time with a significance of 8σ via the process J/ψ→γη′. We measure the branching fraction of η′→π+π−μ+μ− to be B(η′→π+π−μ+μ−)=(1.97±0.33(stat)±0.19(syst))×10−5, where the first and second uncertainties are statistical and systematic, respectively.