检索结果-内蒙古大学图书馆

Determination of the number of ψ(3686)events at BESⅢ

Chinese Physics C 2018年第2期42卷 1-11页

作者：麦迪娜 M.N.Achasov 艾小聪 D.J.Ambrose A.Amoroso 安芬芬安琪白景芝 R.Baldini Ferroli 班勇 J.V.Bennett M.Bertani 边渐鸣 E.Boger O.Bonda renko I.Boyko R.A.Briere 蔡浩蔡啸 O.Cakir A.Calcaterra 曹国富 S.A.Cetin 常劲帆 G.Chelkov 陈刚陈和生陈江川陈玛丽陈申见谌炫陈旭荣陈元柏褚新坤初元萍 D.Cronin-Hennessy 代洪亮代建平 D.Dedovich 邓子艳 A.Denig I.Denysenko M.Destefanis 丁勇董超董静董燎原董明义杜书先范荆州方建房双世方易 L.Fava F.Feldbauer 封常青傅成栋高清高原宁 K.Goetzen 龚文煊 W.Gradl M.Greco 顾旻皓顾运厅管颖慧郭爱强郭玉萍韩艳良 F.A.Harris 何康林何苗 T.Held 衡月昆侯治龙胡海明胡涛黄光顺黄金书黄亮黄性涛 T.Hussain 纪全姬清平季晓斌季筱璐姜丽丽江晓山焦健斌焦铮金大鹏金山 T.Johansson N.Kalantar-Nayestanaki 康晓琳康晓坤 M.Kavatsyuk B.Kloss B.Kopf M.Kornicer A.Kupsc W.Kuhn 赖蔚 J.S.Lange M.Lara P.Larin 李春花李澄李德民李飞李刚李海波李家才李康李科李蕾李培荣李秋菊李卫东李卫国李晓玲李小男李学潜李秀荣李志兵梁昊梁勇飞梁羽铁廖广睿林德旭刘北江刘春秀刘福虎刘芳刘峰刘宏邦刘怀民刘汇慧刘杰刘觉平刘凯刘魁勇刘倩刘树彬刘翔刘玉斌刘振安刘志强刘智青 H.Loehner 娄辛丑吕海江卢怀乐吕军光卢宇卢云鹏罗成林罗民兴 T.Luo 罗小兰吕蒙吕晓睿马凤才马海龙马秋梅马斯马天马骁妍 F.E.Maas M.Maggiora 冒亚军毛泽普 J.G.Messchendorp 闵建闵天觉 R.E.Mitchell 莫晓虎莫玉俊 C.Morales Morales K.Moriya N.Yu.Muchnoi H.Muramatsu Y.Nefedov I.B.Nikolaev 宁哲 S.Nisar 牛顺利牛讯伊马鹏欧阳群 S.Pacetti M.Pelizaeus 彭海平 K.Peters 平加伦平荣刚 R.Poling 祁鸣钱森乔从丰秦小帅秦中华邱进发 K.H.Rashid C.F.Redmer M.Ripka 荣刚 A.Sarantsev K.Schoenning 单葳邵明沈成平沈肖雁盛华义 M.R.Shepherd 宋维民宋欣颖 S.Sosio S.Spataro 孙功星孙俊峰孙胜森孙勇杰孙永昭孙志嘉唐昌建唐晓 I.Tapan E.H.Thorndike D.Toth I.Uman G.S.Varner 王斌王东王大勇王科王亮亮王灵淑王萌王平王佩良王庆娟王炜王雄飞 Y.D.Wang(Yadi) 王贻芳王亚乾王铮王志刚王至勇魏代会 P.Weidenkaff 文硕频 U.Wiedner M.Wolke 伍灵慧吴智夏力钢夏宇肖栋肖振军谢宇广修青磊许国发徐雷徐庆君徐庆年徐新平鄢文标颜永红杨洪勋杨迎杨永栩叶桦叶梅叶铭汉俞伯祥喻纯旭俞洁晟苑长征袁野 A.A.Zafar 曾云张丙新张炳云张长春张达华张宏浩章红宇张佳佳张敬庆张家文张建勇张景芝张磊张瑞张书华张晓杰张学尧张银鸿张瑶张正好张子平张振宇赵光赵京伟赵京周赵雷赵玲赵明刚赵强赵庆旺赵书俊赵天池赵豫斌赵政国 A.Zhemchugov 郑波郑建平郑阳恒钟彬周莉周详周晓康周小蓉周兴玉朱凯朱科军朱相雷朱莹春朱永生朱自安庄建邹冰松邹佳恒无 Institute of High Energy Physics Beijing 100049China Beihang University Beijing 100191China Beijing Institute of Petrochemical Technology Beijing 102617China Bochum Ruhr-University D-44780 BochumGermany Carnegie Mellon University PittsburghPennsylvania 15213USA Central China Normal University Wuhan 430079China China Center of Advanced Science and Technology Beijing 100192China COMSATS Institute of Information Technology LahoreDefence RoadOff Raiwind Road54000 LahorePakistan G.I.Budker Institute of Nuclear Physics SB RAS(BINP) Novosibirsk 630090Russia GSI Helmholtzcentre for Heavy Ion Research GmbH D-64291 DarmstadtGermany Guangxi Normal University Guilin 541004China Guangxi University Nanning 530004China Hangzhou Normal University Hangzhou 310036China Helmholtz Institute Mainz Johann-Joachim-Becher-Weg 45D-55099 MainzGermany Henan Normal University Xinxiang 453007China Henan University of Science and Technology Luoyang 471003China Huangshan College Huangshan 245000China Hunan University Changsha 410082China Indiana University BloomingtonIndiana 47405USA INFN Laboratori Nazionali di Frascati 1-00044FrascatiItaly INFN and University of Perugia 1-06100PerugiaItaly INFN Sezione di Ferrara 1-44122FerraraItaly University of Ferrara 1-44122FerraraItaly Johannes Gutenberg University of Mainz Johann-Joachim-Becher-Weg 45D-55099 MainzGermany Joint Institute for Nuclear Research 141980 DubnaMoscow regionRussia Justus-Liebig-Universitaet Giessen II.Physikalisches InstitutHeinrich-Buff-Ring 16D-35392 GiessenGermany KVI-CART University of GroningenNL-9747 AA GroningenThe Netherlands Lanzhou University Lanzhou 730000China Liaoning University Shenyang 110036China Nanjing Normal University Nanjing 210023China Nanjing University Nanjing 210093China Nankai University Tianjin 300071China Peking University Beijing 100871China Seoul National University Seoul151-747 Korea Shandong University Jinan 250100China Shanghai Jiao Tong University Shanghai 200240China Shanxi University Taiyuan

The numbers of ψ（3686） events accumulated by the BESⅢ detector for the data taken during 2009 and 2012 are determined to be（107.0±0.8）×10^6 and（341.1±2.1）×10^6, respectively, by counting inclusive hadronic events,where the uncertainties are systematic and the statistical uncertainties are negligible. The number of events for the sample taken in 2009 is consistent with that of the previous measurement. The total number of ψ（3686） events for the two data taking periods is（448.1±2.9）×10^6.

关键词： ψ（3686） inclusive process hadronic events Bhabha process

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Observation of D+→ηηπ+ and improved measurement of D0(+)→ηπ+π−(0)

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Physical Review D 2020年第5期101卷 052009-052009页

作者： M. Ablikim M. N. Achasov P. Adlarson S. Ahmed M. Albrecht M. Alekseev A. Amoroso Q. An Anita 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 I. Boyko R. A. Briere H. Cai X. Cai A. Calcaterra G. F. Cao N. Cao S. A. Cetin J. Chai J. F. Chang W. L. Chang G. Chelkov D. Y. Chen G. Chen H. S. Chen J. Chen M. L. Chen S. J. Chen X. R. Chen Y. B. Chen W. Cheng G. Cibinetto F. Cossio X. F. Cui H. L. Dai J. P. Dai X. C. 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 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 A. Q. Guo L. B. Guo R. P. Guo Y. P. Guo A. Guskov S. Han T. T. Han X. Q. Hao F. A. Harris 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 J. S. Huang X. T. Huang X. Z. Huang N. Huesken T. Hussain W. Ikegami Andersson W. Imoehl M. Irshad S. Jaeger Q. Ji Q. P. Ji X. B. Ji X. L. Ji H. B. Jiang X. S. Jiang X. Y. Jiang J. B. Jiao Z. Jiao D. P. Jin 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. S. Lange P. Larin L. Lavezzi H. Leithoff T. Lenz C. Li C. H. Li Cheng Li D. M. Li F. Li G. Li H. B. Li H. J. Li J. C. 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 X. N. Li Z. B. Li Z. Y. Li H. Liang Y. F. Liang Y. T. Liang G. R. Liao L. Z. Liao J. Libby C. X. Lin D. X. Lin Y. J. 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. 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 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 Indian Institute of Technology Madras Chennai 600036 India 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 Avenue 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-Street 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 Istanbul Bilgi University 34060 Eyup Istanbul Turkey Central China Normal University Wuhan 430079 People’s Republic of China Henan Normal University Xinxiang 453007 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

Using an e+e− annihilation data sample corresponding to an integrated luminosity of 2.93 fb−1 collected at the center-of-mass energy of 3.773 GeV with the BESIII detector, we measure the absolute branching fractions of D+→ηηπ+, D+→ηπ+π0, and D0→ηπ+π− to be (2.96±0.24±0.10)×10−3, (2.23±0.15±0.10)×10−3, and (1.20±0.07±0.04)×10−3, respectively, where the first uncertainties are statistical and the second ones are systematic. The D+→ηηπ+ decay is observed for the first time, and the branching fractions of D+(0)→ηπ+π0(−) are measured with much improved precision. In addition we test for CP asymmetries in the separated charge-conjugate branching fractions; no evidence of CP violation is found.

关键词： Particle interactions

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Search for the rare decay η′→π0π0π0π0 at BESIII

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Physical Review D 2020年第3期101卷 032001-032001页

作者： M. Ablikim M. N. Achasov P. Adlarson S. Ahmed M. Albrecht M. Alekseev A. Amoroso Q. An Y. Bai Anita 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 I. Boyko R. A. Briere H. Cai X. Cai A. Calcaterra G. F. Cao N. Cao S. A. Cetin J. Chai J. F. Chang W. L. Chang G. Chelkov D. Y. Chen G. Chen H. S. Chen J. Chen M. L. Chen S. J. Chen X. R. Chen Y. B. Chen W. Cheng G. Cibinetto F. Cossio X. F. Cui H. L. Dai J. P. Dai X. C. 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 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 A. Q. Guo L. B. Guo R. P. Guo Y. P. Guo A. Guskov S. Han T. T. Han X. Q. Hao F. A. Harris 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 J. S. Huang X. T. Huang X. Z. Huang N. Huesken T. Hussain W. Ikegami Andersson W. Imoehl M. Irshad S. Jaeger Q. Ji Q. P. Ji X. B. Ji X. L. Ji H. B. Jiang X. S. Jiang X. Y. Jiang J. B. Jiao Z. Jiao D. P. Jin 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. S. Lange P. Larin L. Lavezzi H. Leithoff T. Lenz C. Li C. H. Li Cheng Li D. M. Li F. Li G. Li H. B. Li H. J. Li J. C. Li Ke Li L. K. Li Lei Li P. L. Li P. R. Li W. D. Li W. G. Li X. H. Li X. L. Li X. N. Li Z. B. Li Z. Y. Li H. Liang Y. F. Liang Y. T. Liang G. R. Liao L. Z. Liao J. Libby C. X. Lin D. X. Lin Y. J. 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 Li 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 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 Indian Institute of Technology Madras Chennai 600036 India 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 Istanbul Bilgi University 34060 Eyup Istanbul Turkey Central China Normal University Wuhan 430079 People’s Republic of China Henan Normal University Xinxiang 453007 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 Un

Using a sample of 1.31×109 J/ψ events collected with the BESIII detector, we perform a search for the rare decay η′→4π0 via J/ψ→γη′. No significant η′ signal is observed in the 4π0 invariant mass spectrum. With a Bayesian approach, the upper limit on the branching fraction is determined to be B(η′→4π0)<4.94×10−5 at the 90% confidence level, which is a factor of 6 smaller than the previous experimental limit.

关键词： Particle decays Rare decays Mesons

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Erratum for: A flexible UWB inverted-F antenna for wearable application

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Microwave and Optical technology Letters 2017年第1期60卷

作者： Li-Jie Xu Hui Wang Yumei Chang Yaming Bo Jiangsu Key Laboratory of Wireless Communications and School of Electronic Science and Engineering Nanjing University of Posts and Telecommunications Nanjing 210003 People's Republic of China Key Laboratory of Science and Technology on Near-Surface Detection Nanjing University of Posts and Telecommunications Nanjing 210003 People's Republic of China

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A compact FMCW SAR real-time imaging system and its performance analysis

A compact FMCW SAR real-time imaging system and its performa...

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IET International Radar Conference 2015

作者： Gu, Chengfei Chang, Wenge Li, Xiangyang Jia, Gaowei Liu, Zhaohe College of Electronic Science and Engineering National University of Defense Technology Changsha410073 China Science and Technology on Near-Surface Detection Laboratory Wuxi214000 China

ISBN: (纸本)9781849199940

This paper presents a compact Ku-band Frequency Modulated Continuous Wave Synthetic Aperture Radar (FMCW SAR) with the capability of real-time imaging. In this compact radar, an eight-core Digital Signal Processor (DSP) is used as the signal processing kernel. With the application of the high-performance processor, the efficiency is significantly improved. During the real-time imaging, the imaging algorithm is modularized, and each processing module of the imaging algorithm is efficiently realized in parallel. To demonstrate the high performance of the parallel processing, the ratio of speedup is analyzed specifically. Beneficial results have been achieved after times of airborne tests.

关键词： Synthetic aperture radar

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Observation of ηc → ωω in J/ψ → γωω

arXiv

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arXiv 2019年

作者： Ablikim, M. Achasov, M.N. Ahmed, S. Albrecht, M. Alekseev, M. Amoroso, A. An, F.F. An, Q. Bai, Y. Bakina, O. Ferroli, R. Baldini Ban, Y. Begzsuren, K. Bennett, D.W. Bennett, J.V. Berger, N. Bertani, M. Bettoni, D. Bianchi, F. Boger, E. Boyko, I. Briere, R.A. Cai, H. Cai, X. Calcaterra, A. Cao, G.F. Cetin, S.A. Chai, J. Chang, J.F. Chang, W.L. Chelkov, G. Chen, G. Chen, H.S. Chen, J.C. Chen, M.L. Chen, S.J. Chen, X.R. Chen, Y.B. Cheng, W. Chu, X.K. Cibinetto, G. Cossio, F. Dai, H.L. Dai, J.P. Dbeyssi, A. Dedovich, D. Deng, Z.Y. Denig, A. Denysenko, I. Destefanis, M. Mori, F. De Ding, Y. Dong, C. Dong, J. Dong, L.Y. Dong, M.Y. Dou, Z.L. Du, S.X. Fan, J.Z. Fang, J. Fang, S.S. Fang, Y. Farinelli, R. Fava, L. Feldbauer, F. Felici, G. Feng, C.Q. Fritsch, M. Fu, C.D. Gao, Q. Gao, X.L. Gao, Y. Gao, Y.G. Gao, Z. Garillon, B. Garzia, I. Gilman, A. Goetzen, K. Gong, L. Gong, W.X. Gradl, W. Greco, M. Gu, L.M. Gu, M.H. Gu, Y.T. Guo, A.Q. Guo, L.B. Guo, R.P. Guo, Y.P. Guskov, A. Han, S. Hao, X.Q. Harris, F.A. He, K.L. Heinsius, F.H. Held, T. Heng, Y.K. Hou, Z.L. Hu, H.M. Hu, J.F. Hu, T. Hu, Y. Huang, G.S. Huang, J.S. Huang, X.T. Huang, X.Z. Huang, Z.L. Hussain, T. Hsken, N. Andersson, W. Ikegami Imoehl, W. Irshad, M. Ji, Q. Ji, Q.P. Ji, X.B. Ji, X.L. Jiang, H.L. Jiang, X.S. Jiang, X.Y. Jiao, J.B. Jiao, Z. Jin, D.P. Jin, S. Jin, Y. Johansson, T. Kalantar-Nayestanaki, N. Kang, X.S. Kavatsyuk, M. Ke, B.C. Keshk, I.K. Khan, T. Khoukaz, A. Kiese, P. Kiuchi, R. Kliemt, R. Koch, L. Kolcu, O.B. Kopf, B. Kuemmel, M. Kuessner, M. Kupsc, A. Kurth, M. Kühn, W. Lange, J.S. Larin, P. Lavezzi, L. Leiber, S. Leithoff, H. Li, 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, K.J. Li, Kang Li, Ke Li, L.K. Li, Lei Li, P.L. Li, P.R. Li, Q.Y. Li, W.D. Li, W.G. Li, X.L. Institute of High Energy Physics Beijing100049 China Beihang University Beijing100191 China Beijing Institute of Petrochemical Technology Beijing102617 China Bochum Ruhr-University BochumD-44780 Germany Carnegie Mellon University PittsburghPA15213 United States Central China Normal University Wuhan430079 China China Center of Advanced Science and Technology Beijing100190 China COMSATS Institute of Information Technology Lahore Defence Road Off Raiwind Road Lahore54000 Pakistan Fudan University Shanghai200443 China Novosibirsk630090 Russia GSI Helmholtzcentre for Heavy Ion Research GmbH DarmstadtD-64291 Germany Guangxi Normal University Guilin541004 China Guangxi University Nanning530004 China Hangzhou Normal University Hangzhou310036 China Helmholtz Institute Mainz Johann-Joachim-Becher-Weg 45 MainzD-55099 Germany Henan Normal University Xinxiang453007 China Henan University of Science and Technology Luoyang471003 China Huangshan College Huangshan245000 China Hunan Normal University Changsha410081 China Hunan University Changsha410082 China Indian Institute of Technology Madras Chennai600036 India Indiana University BloomingtonIN47405 United States INFN Laboratori Nazionali di Frascati FrascatiI-00044 Italy INFN and University of Perugia PerugiaI-06100 Italy INFN Sezione di Ferrara FerraraI-44122 Italy University of Ferrara FerraraI-44122 Italy Institute of Physics and Technology Peace Ave. 54B Ulaanbaatar13330 Mongolia Johannes Gutenberg University of Mainz Johann-Joachim-Becher-Weg 45 MainzD-55099 Germany Joint Institute for Nuclear Research Dubna Moscow region141980 Russia Justus-Liebig-Universitaet Giessen II. Physikalisches Institut Heinrich-Buff-Ring 16 GiessenD-35392 Germany KVI-CART University of Groningen GroningenNL-9747 AA Netherlands Lanzhou University Lanzhou730000 China Liaoning University Shenyang110036 China Nanjing Normal University Nanjing210023 China Nanjing University Nanjing210

Using a sample of (1310.6 ± 7.0) × 106 J/ψ events recorded with the BESIII detector at the symmetric electron positron collider BEPCII, we report the observation of the decay of the (11S0) charmonium state ηc into a pair of ω mesons in the process J/ψ → γωω. The branching fraction is measured for the first time to be B(ηc → ωω) = (2.88 ± 0.10 ± 0.46 ± 0.68) × 10−3, where the first uncertainty is statistical, the second systematic and the third is from the uncertainty of B(J/ψ → γηc). The mass and width of the ηc are determined as M = (2985.9 ± 0.7 ± 2.1) MeV/c2 and Γ = (33.8 ± 1.6 ± 4.1) MeV. Copyright © 2019, The Authors. All rights reserved.

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Search for baryon and lepton number violating decays D+→Λ¯(Σ¯0)e+ and D+→Λ(Σ0)e+

引用

Physical Review D 2020年第3期101卷 031102(R)-031102(R)页

作者： M. Ablikim M. N. Achasov P. Adlarson S. Ahmed M. Albrecht M. Alekseev A. Amoroso F. F. An Q. An 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 I. Boyko R. A. Briere H. Cai X. Cai A. Calcaterra G. F. Cao N. Cao S. A. Cetin J. Chai J. F. Chang W. L. Chang G. Chelkov D. Y. Chen G. Chen H. S. Chen J. C. Chen M. L. Chen S. J. Chen Y. B. Chen W. Cheng G. Cibinetto F. Cossio X. F. Cui H. L. Dai J. P. Dai X. C. 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 J. Z. Fan 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 Q. Gao X. L. Gao Y. Gao Y. G. Gao Z. Gao B. Garillon 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 A. Q. Guo L. B. Guo R. P. Guo Y. P. Guo A. Guskov S. Han X. Q. Hao F. A. Harris K. L. He F. H. Heinsius T. Held Y. K. Heng M. Himmelreich Y. R. Hou 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 N. Huesken T. Hussain W. Ikegami Andersson W. Imoehl M. Irshad Q. Ji Q. P. Ji X. B. Ji X. L. Ji H. L. Jiang X. S. Jiang X. Y. Jiang J. B. Jiao Z. Jiao D. P. Jin 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. Kurth M. G. Kurth W. Kühn J. S. Lange P. Larin L. Lavezzi H. Leithoff T. Lenz 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 Ke Li L. K. Li Lei Li P. L. Li P. R. Li Q. Y. Li W. D. Li W. G. Li X. H. Li X. L. Li X. N. Li Z. B. Li Z. Y. Li H. Liang Y. F. Liang Y. T. Liang G. R. Liao L. Z. Liao J. Libby C. X. Lin D. X. Lin Y. J. 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. 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 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 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 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 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 Tsinghua University Beijing 100084 People’s Republic of China University of Ferrara I-44122 Ferrara Italy University of Eastern Piedmont I-15121 Alessandria Italy University of Manchester Oxford Roa

Using a 2.93 fb−1 data sample of electron-positron collisions taken with the BESIII detector at a center-of-mass energy of 3.773 GeV, which corresponds to (8296±31±64)×103D+D− pairs, we search for the baryon and lepton number violating decays D+→Λ¯(Σ¯0)e+ and D+→Λ(Σ0)e+. No obvious signals are found with the current statistics and upper limits on the branching fractions of these four decays are set at the level of 10−6 at 90% confidence level.

关键词： Branching fraction Hadronic decays Hyperons Baryon & lepton number symmetries

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Observation of χcJ → 4KS0

arXiv

引用

arXiv 2019年

作者： Ablikim, M. Achasov, M.N. Ahmed, S. Albrecht, M. Alekseev, M. Amoroso, A. An, F.F. An, Q. Bai, Y. Bakina, O. Ferroli, R. Baldini Ban, Y. Begzsuren, K. Bennett, D.W. Bennett, J.V. Berger, N. Bertani, M. Bettoni, D. Bianchi, F. Boger, E. Boyko, I. Briere, R.A. Cai, H. Cai, X. Calcaterra, A. Cao, G.F. Cetin, S.A. Chai, J. Chang, J.F. Chang, W.L. Chelkov, G. Chen, G. Chen, H.S. Chen, J.C. Chen, M.L. Chen, P.L. Chen, S.J. Chen, X.R. Chen, Y.B. Cheng, W. Chu, X.K. Cibinetto, G. Cossio, F. Dai, H.L. Dai, J.P. Dbeyssi, A. Dedovich, D. Deng, Z.Y. Denig, A. Denysenko, I. Destefanis, M. de Mori, F. Ding, Y. Dong, C. Dong, J. Dong, L.Y. Dong, M.Y. Dou, Z.L. Du, S.X. Duan, P.F. Fang, J. Fang, S.S. Fang, Y. Farinelli, R. Fava, L. Fegan, S. Feldbauer, F. Felici, G. Feng, C.Q. Fritsch, M. Fu, C.D. Gao, Q. Gao, X.L. Gao, Y. Gao, Y.G. Gao, Z. Garillon, B. Garzia, I. Gilman, A. Goetzen, K. Gong, L. Gong, W.X. Gradl, W. Greco, M. Gu, L.M. Gu, M.H. Gu, Y.T. Guo, A.Q. Guo, L.B. Guo, R.P. Guo, Y.P. Guskov, A. Haddadi, Z. Han, S. Hao, X.Q. Harris, F.A. He, K.L. He, X.Q. Heinsius, F.H. Held, T. Heng, Y.K. Hou, Z.L. Hu, H.M. Hu, J.F. Hu, T. Hu, Y. Huang, G.S. Huang, J.S. Huang, X.T. Huang, X.Z. Huang, Z.L. Hussain, T. Andersson, W. Ikegami Irshad, M. Ji, Q. Ji, Q.P. Ji, X.B. Ji, X.L. Jiang, H.L. Jiang, X.S. Jiang, X.Y. Jiao, J.B. Jiao, Z. Jin, D.P. Jin, S. Jin, Y. Johansson, T. Julin, A. Kalantar-Nayestanaki, N. Kang, X.S. Kavatsyuk, M. Ke, B.C. Keshk, I.K. Khan, T. Khoukaz, A. Kiese, P. Kiuchi, R. Kliemt, R. Koch, L. Kolcu, O.B. Kopf, B. Kornicer, M. Kuemmel, M. Kuessner, M. Kupsc, A. Kurth, M. Kühn, W. Lange, J.S. Larin, P. Lavezzi, L. Leiber, S. Leithoff, H. Li, 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, K.J. Li, Kang Li, Ke Li, Lei Li, P.L. Li, P.R. Institute of High Energy Physics Beijing100049 China Beihang University Beijing100191 China Beijing Institute of Petrochemical Technology Beijing102617 China Bochum Ruhr-University BochumD-44780 Germany Carnegie Mellon University PittsburghPA15213 United States Central China Normal University Wuhan430079 China China Center of Advanced Science and Technology Beijing100190 China COMSATS Institute of Information Technology Lahore Defence Road Off Raiwind Road Lahore54000 Pakistan Fudan University Shanghai200443 China Novosibirsk630090 Russia GSI Helmholtzcentre for Heavy Ion Research GmbH DarmstadtD-64291 Germany Guangxi Normal University Guilin541004 China Guangxi University Nanning530004 China Hangzhou Normal University Hangzhou310036 China Helmholtz Institute Mainz Johann-Joachim-Becher-Weg 45 MainzD-55099 Germany Henan Normal University Xinxiang453007 China Henan University of Science and Technology Luoyang471003 China Huangshan College Huangshan245000 China Hunan Normal University Changsha410081 China Hunan University Changsha410082 China Indian Institute of Technology Madras Chennai600036 India Indiana University BloomingtonIN47405 United States INFN Laboratori Nazionali di Frascati FrascatiI-00044 Italy INFN University of Perugia PerugiaI-06100 Italy INFN Sezione di Ferrara FerraraI-44122 Italy University of Ferrara FerraraI-44122 Italy Institute of Physics and Technology Peace Ave. 54B Ulaanbaatar13330 Mongolia Johannes Gutenberg University of Mainz Johann-Joachim-Becher-Weg 45 MainzD-55099 Germany Joint Institute for Nuclear Research Dubna Moscow region141980 Russia Justus-Liebig-Universitaet Giessen II. Physikalisches Institut Heinrich-Buff-Ring 16 GiessenD-35392 Germany KVI-CART University of Groningen GroningenNL-9747 AA Netherlands Lanzhou University Lanzhou730000 China Liaoning University Shenyang110036 China Nanjing Normal University Nanjing210023 China Nanjing University Nanjing210093

By analyzing (448.1 ± 2.9) × 106 ψ(3686) events collected with the BESIII detector operating at the BEPCII collider, the decays of χcJ → 4KS0 (J = 0, 1, 2) are observed for the first time with statistical significances of 26.5σ, 5.9σ and 11.4σ, respectively. The product branching fractions of ψ(3686) → γχcJ, χcJ → 4KS0 are presented and the branching fractions of χcJ → 4KS0 decays are determined to be Bχc0→4KS0 =(5.76 ± 0.34 ± 0.38)×10−4, Bχc1→4KS0 =(0.35 ± 0.09 ± 0.03)×10−4 and Bχc2→4KS0 =(1.14 ± 0.15 ± 0.08)×10−4, where the first uncertainties are statistical and the second are systematic, respectively. Copyright © 2019, The Authors. All rights reserved.

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Measurement of branching fractions for D meson decaying into φ meson and a pseudoscalar meson

arXiv

引用

arXiv 2019年

作者： Ablikim, M. Achasov, M.N. Adlarson, P. Ahmed, S. Albrecht, M. Alekseev, M. Amoroso, A. An, F.F. An, Q. Bai, Y. Bakina, O. Ferroli, R. Baldini Balossino, I. Ban, Y. Begzsuren, K. Bennett, J.V. Berger, N. Bertani, M. Bettoni, D. Bianchi, F. Biernat, J. Bloms, J. Boyko, I. Briere, R.A. Cai, H. Cai, X. Calcaterra, A. Cao, G.F. Cao, N. Cetin, S.A. Chai, J. Chang, J.F. Chang, W.L. Chelkov, G. Chen, D.Y. Chen, G. Chen, H.S. Chen, J.C. Chen, M.L. Chen, S.J. Chen, Y.B. Cheng, W. Cibinetto, G. Cossio, F. Cui, X.F. Dai, H.L. Dai, J.P. Dai, X.C. Dbeyssi, A. Dedovich, D. Deng, Z.Y. Denig, A. Denysenko, I. Destefanis, M. Mori, F. De Ding, Y. Dong, C. Dong, J. Dong, L.Y. Dong, M.Y. Dou, Z.L. Du, S.X. Fan, J.Z. Fang, J. Fang, S.S. Fang, Y. Farinelli, R. Fava, L. Feldbauer, F. Felici, G. Feng, C.Q. Fritsch, M. Fu, C.D. Fu, Y. Gao, Q. Gao, X.L. Gao, Y. Gao, Y. Gao, Y.G. Gao, Z. Garillon, B. Garzia, I. Gersabeck, E.M. Gilman, A. Goetzen, K. Gong, L. Gong, W.X. Gradl, W. Greco, M. Gu, L.M. Gu, M.H. Gu, S. Gu, Y.T. Guo, A.Q. Guo, L.B. Guo, R.P. Guo, Y.P. Guskov, A. Han, S. Hao, X.Q. Harris, F.A. He, K.L. Heinsius, F.H. Held, T. Heng, Y.K. Himmelreich, M. Hou, Y.R. Hou, Z.L. Hu, H.M. Hu, J.F. Hu, T. Hu, Y. Huang, G.S. Huang, J.S. Huang, X.T. Huang, X.Z. Huesken, N. Hussain, T. Andersson, W. Ikegami Imoehl, W. Irshad, M. Ji, Q. Ji, Q.P. Ji, X.B. Ji, X.L. Jiang, H.L. Jiang, X.S. Jiang, X.Y. Jiao, J.B. Jiao, Z. Jin, D.P. Jin, S. Jin, Y. Johansson, T. Kalantar-Nayestanaki, N. Kang, X.S. Kappert, R. Kavatsyuk, M. Ke, B.C. Keshk, I.K. Khoukaz, A. Kiese, P. Kiuchi, R. Kliemt, R. Koch, L. Kolcu, O.B. Kopf, B. Kuemmel, M. Kuessner, M. Kupsc, A. Kurth, M. Kurth, M.G. Kühn, W. Lange, J.S. Larin, P. Lavezzi, L. Leithoff, H. Lenz, T. Li, 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. Institute of High Energy Physics Beijing100049 China Beihang University Beijing100191 China Beijing Institute of Petrochemical Technology Beijing102617 China Bochum Ruhr-University BochumD-44780 Germany Carnegie Mellon University PittsburghPA15213 United States Central China Normal University Wuhan430079 China China Center of Advanced Science and Technology Beijing100190 China COMSATS University Islamabad Lahore Campus Defence Road Off Raiwind Road Lahore54000 Pakistan Fudan University Shanghai200443 China Novosibirsk630090 Russia GSI Helmholtzcentre for Heavy Ion Research GmbH DarmstadtD-64291 Germany Guangxi Normal University Guilin541004 China Guangxi University Nanning530004 China Hangzhou Normal University Hangzhou310036 China Helmholtz Institute Mainz Johann-Joachim-Becher-Weg 45 MainzD-55099 Germany Henan Normal University Xinxiang453007 China Henan University of Science and Technology Luoyang471003 China Huangshan College Huangshan245000 China Hunan Normal University Changsha410081 China Hunan University Changsha410082 China Indian Institute of Technology Madras Chennai600036 India Indiana University BloomingtonIN47405 United States INFN Laboratori Nazionali di Frascati FrascatiI-00044 Italy INFN and University of Perugia PerugiaI-06100 Italy INFN Sezione di Ferrara FerraraI-44122 Italy University of Ferrara FerraraI-44122 Italy Institute of Physics and Technology Peace Ave. 54B Ulaanbaatar13330 Mongolia Johannes Gutenberg University of Mainz Johann-Joachim-Becher-Weg 45 MainzD-55099 Germany Joint Institute for Nuclear Research Dubna Moscow region141980 Russia Justus-Liebig-Universitaet Giessen II. Physikalisches Institut Heinrich-Buff-Ring 16 GiessenD-35392 Germany KVI-CART University of Groningen GroningenNL-9747 AA Netherlands Lanzhou University Lanzhou730000 China Liaoning University Shenyang110036 China Nanjing Normal University Nanjing210023 China Nanjing University Nanjing210093 Chi

The four decay modes D0 → φπ0, D0 → φη, D+ → φπ+, and D+ → φK+ are studied by using a data sample taken at the centre-of-mass energy √s = 3.773 GeV with the BESIII detector, corresponding to an integrated luminosity of 2.93 fb−1. The branching fractions of the first three decay modes are measured to be B(D0 → φπ0) = (1.168±0.028±0.028)×10−3, B(D0 → φη) = (1.81±0.46±0.06)×10−4, and B(D+ → φπ+) = (5.70±0.05± 0.13) × 10−3, respectively, where the first uncertainties are statistical and the second are systematic. No significant signal is observed of the decay D+ → φK+ and the upper limit of its branching fraction is set for the first time, to be 2.1 × 10−5 at the 90% confidence level. The ratio of B(D0 → φπ0) to B(D+ → φπ+) is calculated to be (20.49 ± 0.50 ± 0.45)%, which is consistent with the theoretical prediction based on isospin symmetry between these two decay modes. Copyright © 2019, The Authors. All rights reserved.

关键词： Hadrons

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Precision measurement of the branching fractions of η′ decays

arXiv

引用

arXiv 2019年

作者： Ablikim, M. Achasov, M.N. Ahmed, S. Albrecht, M. Alekseev, M. Amoroso, A. An, F.F. An, Q. Bai, Y. Bakina, O. Baldini Ferroli, R. Ban, Y. Begzsuren, K. Bennett, D.W. Bennett, J.V. Berger, N. Bertani, M. Bettoni, D. Bianchi, F. Boger, E. Boyko, I. Briere, R.A. Cai, H. Cai, X. Calcaterra, A. Cao, G.F. Cetin, S.A. Chai, J. Chang, J.F. Chang, W.L. Chelkov, G. Chen, G. Chen, H.S. Chen, J.C. Chen, M.L. Chen, P.L. Chen, S.J. Chen, X.R. Chen, Y.B. Cheng, W. Chu, X.K. Cibinetto, G. Cossio, F. Dai, H.L. Dai, J.P. Dbeyssi, A. Dedovich, D. Deng, Z.Y. Denig, A. Denysenko, I. Destefanis, M. de Mori, F. Ding, Y. Dong, C. Dong, J. Dong, L.Y. Dong, M.Y. Dou, Z.L. Du, S.X. Duan, P.F. Fan, J.Z. Fang, J. Fang, S.S. Fang, Y. Farinelli, R. Fava, L. Feldbauer, F. Felici, G. Feng, C.Q. Fritsch, M. Fu, C.D. Gao, Q. Gao, X.L. Gao, Y. Gao, Y.G. Gao, Z. Garillon, B. Garzia, I. Gilman, A. Goetzen, K. Gong, L. Gong, W.X. Gradl, W. Greco, M. Gu, L.M. Gu, M.H. Gu, Y.T. Guo, A.Q. Guo, L.B. Guo, R.P. Guo, Y.P. Guskov, A. Haddadi, Z. Han, S. Hao, X.Q. Harris, F.A. He, K.L. Heinsius, F.H. Held, T. Heng, Y.K. Hou, Z.L. Hu, H.M. Hu, J.F. Hu, T. Hu, Y. Huang, G.S. Huang, J.S. Huang, X.T. Huang, X.Z. Huang, Z.L. Hussain, T. Ikegami Andersson, W. Imoehl, W. Irshad, M. Ji, Q. Ji, Q.P. Ji, X.B. Ji, X.L. Jiang, H.L. Jiang, X.S. Jiang, X.Y. Jiao, J.B. Jiao, Z. Jin, D.P. Jin, S. Jin, Y. Johansson, T. Kalantar-Nayestanaki, N. Kang, X.S. Kavatsyuk, M. Ke, B.C. Keshk, I.K. Khan, T. Khoukaz, A. Kiese, P. Kiuchi, R. Kliemt, R. Koch, L. Kolcu, O.B. Kopf, B. Kuemmel, M. Kuessner, M. Kupsc, A. Kurth, M. Kühn, W. Lange, J.S. Larin, P. Lavezzi, L. Leiber, S. Leithoff, H. Li, 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, K.J. Li, Kang Li, Ke Li, L.K. Li, Lei Li, P.L. Li, P.R. Institute of High Energy Physics Beijing100049 China Beihang University Beijing100191 China Beijing Institute of Petrochemical Technology Beijing102617 China Bochum Ruhr-University BochumD-44780 Germany Carnegie Mellon University PittsburghPA15213 United States Central China Normal University Wuhan430079 China China Center of Advanced Science and Technology Beijing100190 China COMSATS Institute of Information Technology Lahore Defence Road Off Raiwind Road Lahore54000 Pakistan Fudan University Shanghai200443 China Novosibirsk630090 Russia GSI Helmholtzcentre for Heavy Ion Research GmbH DarmstadtD-64291 Germany Guangxi Normal University Guilin541004 China Guangxi University Nanning530004 China Hangzhou Normal University Hangzhou310036 China Helmholtz Institute Mainz Johann-Joachim-Becher-Weg 45 MainzD-55099 Germany Henan Normal University Xinxiang453007 China Henan University of Science and Technology Luoyang471003 China Huangshan College Huangshan245000 China Hunan Normal University Changsha410081 China Hunan University Changsha410082 China Indian Institute of Technology Madras Chennai600036 India Indiana University BloomingtonIN47405 United States INFN Laboratori Nazionali di Frascati FrascatiI-00044 Italy INFN University of Perugia PerugiaI-06100 Italy INFN Sezione di Ferrara I-44122 Ferrara Italy University of Ferrara FerraraI-44122 Italy Institute of Physics and Technology Peace Ave. 54B Ulaanbaatar13330 Mongolia Johannes Gutenberg University of Mainz Johann-Joachim-Becher-Weg 45 MainzD-55099 Germany Joint Institute for Nuclear Research Dubna Moscow region141980 Russia Justus-Liebig-Universitaet Giessen II. Physikalisches Institut Heinrich-Buff-Ring 16 GiessenD-35392 Germany KVI CART University of Groningen GroningenNL-9747 AA Netherlands Lanzhou University Lanzhou730000 China Liaoning University Shenyang110036 China Nanjing Normal University Nanjing210023 China Nanjing University Nanjing21

Based on a sample of (1310.6 ± 7.0) × 106 J/ψ events collected with the BESIII detector, we present measurements of J/ψ and η′ absolute branching fractions using the process J/ψ → γη′. By analyzing events where the radiative photon converts into an e+e− pair, the branching fraction for J/ψ → γη′ is measured to be (5.27 ± 0.03 ± 0.05) × 10−3. The absolute branching fractions of the five dominant decay channels of the η′ are then measured for the first time and are determined to be B(η′ → γπ+π−) = (29.90±0.03±0.55)%, B(η′ → ηπ+π−) = (41.24±0.08±1.24)%, B(η′ → ηπ0π0) = (21.36±0.10±0.92)%, B(η′ → γω) = (2.489±0.018±0.074)%, and B(η′ → γγ) = (2.331±0.012±0.035)%, where the first uncertainties are statistical and the second systematic. Copyright © 2019, The Authors. All rights reserved.

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