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Observation of an Axial-Vector State in the Study of the Decay ψ(3686)→ϕηη′

Physical Review Letters 2025年第19期134卷 191901-191901页

作者： M. Ablikim M. N. Achasov P. Adlarson O. Afedulidis X. C. Ai R. Aliberti A. Amoroso Q. An Y. Bai O. Bakina I. Balossino Y. Ban H.-R. Bao V. Batozskaya K. Begzsuren N. Berger M. Berlowski M. Bertani D. Bettoni F. Bianchi E. Bianco A. Bortone I. Boyko R. A. Briere A. Brueggemann H. Cai X. Cai A. Calcaterra G. F. Cao N. Cao S. A. Cetin J. F. Chang W. L. Chang G. R. Che G. Chelkov C. Chen C. H. Chen Chao Chen G. Chen H. S. Chen M. L. Chen S. J. Chen S. L. Chen S. M. Chen T. Chen X. R. Chen X. T. Chen Y. B. Chen Y. Q. Chen Z. J. Chen Z. Y. Chen S. K. Choi X. Chu G. Cibinetto F. Cossio J. J. Cui H. L. Dai J. P. Dai A. Dbeyssi R. E. de Boer D. Dedovich C. Q. Deng Z. Y. Deng A. Denig I. Denysenko M. Destefanis F. De Mori B. Ding X. X. Ding Y. Ding J. Dong L. Y. Dong M. Y. Dong X. Dong M. C. Du S. X. Du Z. H. Duan P. Egorov Y. H. Fan J. Fang S. S. Fang W. X. Fang Y. Fang Y. Q. Fang R. Farinelli L. Fava F. Feldbauer G. Felici C. Q. Feng J. H. Feng Y. T. Feng K. Fischer M. Fritsch C. D. Fu J. L. Fu Y. W. Fu H. Gao Y. N. Gao Yang Gao S. Garbolino I. Garzia L. Ge P. T. Ge Z. W. Ge C. Geng E. M. Gersabeck A. Gilman K. Goetzen L. Gong W. X. Gong W. Gradl S. Gramigna M. Greco M. H. Gu Y. T. Gu C. Y. Guan Z. L. Guan A. Q. Guo L. B. Guo M. J. Guo R. P. Guo Y. P. Guo A. Guskov J. Gutierrez K. L. Han T. T. Han X. Q. Hao F. A. Harris K. K. He K. L. He F. H. Heinsius C. H. Heinz Y. K. Heng C. Herold T. Holtmann P. C. Hong G. Y. Hou X. T. Hou Y. R. Hou Z. L. Hou B. Y. Hu H. M. Hu J. F. Hu T. Hu Y. Hu G. S. Huang K. X. Huang L. Q. Huang X. T. Huang Y. P. Huang T. Hussain F. Hölzken N. Hüsken N. in der Wiesche M. Irshad J. Jackson S. Janchiv J. H. Jeong Q. Ji Q. P. Ji W. Ji X. B. Ji X. L. Ji Y. Y. Ji X. Q. Jia Z. K. Jia D. Jiang H. B. Jiang P. C. Jiang S. S. Jiang T. J. Jiang X. S. Jiang Y. Jiang J. B. Jiao J. K. Jiao Z. Jiao S. Jin Y. Jin M. Q. Jing X. M. Jing T. Johansson S. Kabana N. Kalantar-Nayestanaki X. L. Kang X. S. Kang M. Kavatsyuk B. C. Ke V. Khachatryan A. Khoukaz R. Kiuchi O. B. Kolcu B. Kopf M. Kuessner X. Kui N. Kumar A. Ku Institute of High Energy Physics Beijing 100049 People’s Republic of China Budker Institute of Nuclear Physics SB RAS (BINP) Novosibirsk 630090 Russia Also at the Novosibirsk State University Novosibirsk 630090 Russia. Uppsala University Box 516 SE-75120 Uppsala Sweden Bochum Ruhr-University D-44780 Bochum Germany Zhengzhou University Zhengzhou 450001 People’s Republic of China Johannes Gutenberg University of Mainz Johann-Joachim-Becher-Weg 45 D-55099 Mainz 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 Southeast University Nanjing 211100 People’s Republic of China Joint Institute for Nuclear Research 141980 Dubna Moscow region Russia INFN Sezione di Ferrara INFN Sezione di Ferrara I-44122 Ferrara Italy Peking University Beijing 100871 People’s Republic of China Also at State Key Laboratory of Nuclear Physics and Technology Peking University Beijing 100871 People’s Republic of China. University of Chinese Academy of Sciences Beijing 100049 People’s Republic of China National Centre for Nuclear Research Warsaw 02-093 Poland Institute of Physics and Technology Peace Avenue 54B Ulaanbaatar 13330 Mongolia INFN Laboratori Nazionali di Frascati INFN Laboratori Nazionali di Frascati I-00044 Frascati Italy Carnegie Mellon University Pittsburgh Pennsylvania 15213 USA University of Muenster Wilhelm-Klemm-Strasse 9 48149 Muenster Germany Wuhan University Wuhan 430072 People’s Republic of China Turkish Accelerator Center Particle Factory Group Istinye University 34010 Istanbul Turkey Nankai University Tianjin 300071 People’s Republic of China Also at the Moscow Institute of Physics and Technology Moscow 141700 Russia. China University of Geosciences Wuhan 430074 People’s Republic of China Soochow Univer

Using (2712.4±14.3)×106 ψ(3686) events collected with the BESIII detector at BEPCII, a partial wave analysis of the decay ψ(3686)→ϕηη′ is performed with the covariant tensor approach. In addition to the established states h1(1900) and ϕ(2170), an axial-vector state with a mass near 2.3 GeV/c2 is observed for the first time. Its mass and width are measured to be 2316±9stat±30syst MeV/c2 and 89±15stat±26syst MeV, respectively. The product branching fractions of B[ψ(3686)→X(2300)η′]B[X(2300)→ϕη] and B[ψ(3686)→X(2300)η]B[X(2300)→ϕη′] are determined to be (4.8±1.3stat±0.7syst)×10−6 and (2.2±0.7stat±0.7syst)×10−6, respectively. The branching fraction B[ψ(3686)→ϕηη′] is measured for the first time to be (3.14±0.17stat±0.24syst)×10−5. The first uncertainties are statistical and the second are systematic.

关键词： Stresses

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Study of e ⁺ e ⁻ → γϕJ/ψ from √s = 4.600 to 4.951 GeV

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Journal of High Energy Physics 2023年第1期2023卷 132页

作者： Ablikim, M. Achasov, M.N. Adlarson, P. Albrecht, M. Aliberti, R. Amoroso, A. An, M.R. An, Q. Bai, Y. Bakina, O. Baldini Ferroli, R. Balossino, I. Ban, Y. Batozskaya, V. Becker, D. Begzsuren, K. Berger, N. Bertani, M. Bettoni, D. Bianchi, F. Bianco, E. Bloms, J. Bortone, A. Boyko, I. Briere, R.A. Brueggemann, A. Cai, H. Cai, X. Calcaterra, A. Cao, G.F. Cao, N. Cetin, S.A. Chang, J.F. Chang, W.L. Che, G.R. Chelkov, G. Chen, Chao Chen, G. Chen, H.S. Chen, M.L. Chen, S.J. Chen, S.M. Chen, T. Chen, X.R. Chen, X.T. Chen, Y.B. Chen, Z.J. Cheng, W.S. Choi, S.K. Chu, X. Cibinetto, G. Cossio, F. Cui, J.J. Dai, H.L. Dai, J.P. Dbeyssi, A. de Boer, R.E. Dedovich, D. Deng, Z.Y. Denig, A. Denysenko, I. Destefanis, M. De Mori, F. Ding, Y. Dong, J. Dong, L.Y. Dong, M.Y. Dong, X. Du, S.X. Duan, Z.H. Egorov, P. Fan, Y.L. Fang, J. Fang, S.S. Fang, W.X. Fang, Y. Farinelli, R. Fava, L. Feldbauer, F. Felici, G. Feng, C.Q. Feng, J.H. Fischer, K. Fritsch, M. Fritzsch, C. Fu, C.D. Gao, H. Gao, Y.N. Gao, Yang Garbolino, S. Garzia, I. Ge, P.T. Ge, Z.W. Geng, C. Gersabeck, E.M. Gilman, A. Goetzen, K. Gong, L. Gong, W.X. Gradl, W. Greco, M. Gu, L.M. Gu, M.H. Gu, Y.T. Guan, C.Y. Guo, A.Q. Guo, L.B. Guo, R.P. Guo, Y.P. Guskov, A. Han, W.Y. Hao, X.Q. Harris, F.A. He, K.K. He, K.L. Heinsius, F.H. Heinz, C.H. Heng, Y.K. Herold, C. Hou, G.Y. Hou, Y.R. Hou, Z.L. Hu, H.M. Hu, J.F. Hu, T. Hu, Y. Huang, G.S. Huang, K.X. Huang, L.Q. Huang, X.T. Huang, Y.P. Huang, Z. Hussain, T. Hüsken, N. Imoehl, W. Irshad, M. Jackson, J. Jaeger, S. Janchiv, S. Jang, E. Jeong, J.H. Ji, Q. Ji, Q.P. Ji, X.B. Ji, X.L. Ji, Y.Y. Jia, Z.K. Jiang, P.C. Jiang, S.S. Jiang, X.S. Jiang, Y. Jiao, J.B. Jiao, Z. Jin, S. Jin, Y. Jing, M.Q. Johansson, T. Kabana, S. Kalantar-Nayestanaki, N. Kang, X.L. Kang, X.S. Kappert, R. Kavatsyuk, M. Ke, B.C. Keshk, I.K. Khoukaz, A. Kiuchi, R. Kliemt, R. Koch, L. Kolcu, O.B. Kopf, B. Kuemmel, M. Kuessner, M. Kupsc, A. Kühn, W. Lane, J.J. Lange, J.S. Larin, P. Lavania, A. Lavezzi, L. Lei, T.T. Lei, Z.H. Leithoff, H. Lellmann, M. Lenz, T. Li, Cheng Li Institute of High Energy Physics Beijing 100049 China Beihang University Beijing 100191 China Beijing Institute of Petrochemical Technology Beijing 102617 China Bochum Ruhr-University Bochum D-44780 Germany Carnegie Mellon University Pittsburgh 15213 PA United States Central China Normal University Wuhan 430079 China Central South University Changsha 410083 China China Center of Advanced Science and Technology Beijing 100190 China China University of Geosciences Wuhan 430074 China COMSATS University Islamabad Lahore Campus Defence Road Off Raiwind Road Lahore 54000 Pakistan Fudan University Shanghai 200433 China G.I. Budker Institute of Nuclear Physics SB RAS (BINP) Novosibirsk 630090 Russian Federation GSI Helmholtzcentre for Heavy Ion Research GmbH Darmstadt D-64291 Germany Guangxi Normal University Guilin 541004 China Guangxi University Nanning 530004 China Hangzhou Normal University Hangzhou 310036 China Hebei University Baoding 071002 China Helmholtz Institute Mainz Staudinger Weg 18 Mainz D-55099 Germany Henan Normal University Xinxiang 453007 China Henan University of Science and Technology Luoyang 471003 China Henan University of Technology Zhengzhou 450001 China Huangshan College Huangshan 245000 China Hunan Normal University Changsha 410081 China Hunan University Changsha 410082 China Indian Institute of Technology Madras Chennai 600036 India Indiana University Bloomington 47405 IN United States INFN Laboratori Nazionali di Frascati Frascati I-00044 Italy INFN Sezione di Perugia Perugia I-06100 Italy University of Perugia Perugia I-06100 Italy INFN Sezione di Ferrara Ferrara I-44122 Italy University of Ferrara Ferrara I-44122 Italy Institute of Modern Physics Lanzhou 730000 China Institute of Physics and Technology Peace Avenue 54B Ulaanbaatar 13330 Mongolia Instituto de Alta Investigación Universidad de Tarapacá Casilla 7D Arica Chile Jilin University Changchun 130012 China Johannes Gutenber

Using data samples with an integrated luminosity of 6.4 fb−1 collected by the BESIII detector operating at the BEPCII storage ring, the process of e+e− → γϕJ/ψ is studied. The processes of e+e− → ϕχc1,c2, χc1,c2... 详细信息

Using data samples with an integrated luminosity of 6.4 fb⁻¹ collected by the BESIII detector operating at the BEPCII storage ring, the process of e⁺e⁻ → γϕJ/ψ is studied. The processes of e⁺e⁻ → ϕχ_c1,_c2, χ_c1,_c2 → γJ/ψ are observed with a significance of more than 10σ. The s-dependent cross section of e⁺e⁻ → ϕχ_c1,_c2 is measured between 4.600 and 4.951 GeV, and evidence of a resonance structure is found for the first time in the ϕχ_c2 process. We also search for the processes of e⁺e⁻ → γX(4140), γX(4274) and γX(4500) via the γϕJ/ψ final state, but no obvious structures are found. The upper limits on the production cross section times the branching fraction for these processes at the 90% confidence level are reported. [Figure not available: see fulltext.]. © 2023, The Author(s).

关键词： e+-e− Experiments Exotics Quarkonium Spectroscopy

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Measurement of the branching fractions of D+→K+K−π+π+π−, ϕπ+π+π−, KS0K+π+π−π0, KS0K+η, and KS0K+ω decays

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Physical Review D 2025年第9期111卷 092005-092005页

作者： M. Ablikim M. N. Achasov P. Adlarson X. C. Ai R. Aliberti A. Amoroso Q. An Y. Bai O. Bakina Y. Ban H.-R. Bao V. Batozskaya K. Begzsuren N. Berger M. Berlowski M. Bertani D. Bettoni F. Bianchi E. Bianco A. Bortone I. Boyko R. A. Briere A. Brueggemann H. Cai M. H. Cai X. Cai A. Calcaterra G. F. Cao N. Cao S. A. Cetin X. Y. Chai J. F. Chang G. R. Che Y. Z. Che G. Chelkov C. Chen C. H. Chen Chao Chen G. Chen H. S. Chen H. Y. Chen M. L. Chen S. J. Chen S. L. Chen S. M. Chen T. Chen X. R. Chen X. T. Chen Y. B. Chen Y. Q. Chen Z. J. Chen Z. K. Chen S. K. Choi X. Chu G. Cibinetto F. Cossio J. J. Cui H. L. Dai J. P. Dai A. Dbeyssi R. E. de Boer D. Dedovich C. Q. Deng Z. Y. Deng A. Denig I. Denysenko M. Destefanis F. De Mori B. Ding X. X. Ding Y. Ding Y. X. Ding J. Dong L. Y. Dong M. Y. Dong X. Dong M. C. Du S. X. Du Y. Y. Duan Z. H. Duan P. Egorov G. F. Fan J. J. Fan Y. H. Fan J. Fang S. S. Fang W. X. Fang Y. Q. Fang R. Farinelli L. Fava F. Feldbauer G. Felici C. Q. Feng J. H. Feng Y. T. Feng M. Fritsch C. D. Fu J. L. Fu Y. W. Fu H. Gao X. B. Gao Y. N. Gao Y. Y. Gao Yang Gao S. Garbolino I. Garzia P. T. Ge Z. W. Ge C. Geng E. M. Gersabeck A. Gilman K. Goetzen J. D. Gong L. Gong W. X. Gong W. Gradl S. Gramigna M. Greco M. H. Gu Y. T. Gu C. Y. Guan A. Q. Guo L. B. Guo M. J. Guo R. P. Guo Y. P. Guo A. Guskov J. Gutierrez K. L. Han T. T. Han F. Hanisch K. D. Hao X. Q. Hao F. A. Harris K. K. He K. L. He F. H. Heinsius C. H. Heinz Y. K. Heng C. Herold T. Holtmann P. C. Hong G. Y. Hou X. T. Hou Y. R. Hou Z. L. Hou B. Y. Hu H. M. Hu J. F. Hu Q. P. Hu S. L. Hu T. Hu Y. Hu Z. M. Hu G. S. Huang K. X. Huang L. Q. Huang P. Huang X. T. Huang Y. P. Huang Y. S. Huang T. Hussain N. Hüsken N. in der Wiesche J. Jackson S. Janchiv Q. Ji Q. P. Ji W. Ji X. B. Ji X. L. Ji Y. Y. Ji Z. K. Jia D. Jiang H. B. Jiang P. C. Jiang S. J. Jiang T. J. Jiang X. S. Jiang Y. Jiang J. B. Jiao J. K. Jiao Z. Jiao S. Jin Y. Jin M. Q. Jing X. M. Jing T. Johansson S. Kabana N. Kalantar-Nayestanaki X. L. Kang X. S. Kang M. Kavatsyuk B. C. Ke V. Khachatryan A. Khouk Institute of High Energy Physics Beijing 100049 People’s Republic of China Budker Institute of Nuclear Physics SB RAS (BINP) Novosibirsk 630090 Russia Also at the Novosibirsk State University Novosibirsk 630090 Russia. Uppsala University Box 516 SE-75120 Uppsala Sweden Zhengzhou University Zhengzhou 450001 People’s Republic of China Johannes Gutenberg University of Mainz Johann-Joachim-Becher-Weg 45 D-55099 Mainz 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 Deceased. Southeast University Nanjing 211100 People’s Republic of China Joint Institute for Nuclear Research 141980 Dubna Moscow Region Russia Peking University Beijing 100871 People’s Republic of China Also at State Key Laboratory of Nuclear Physics and Technology Peking University Beijing 100871 People’s Republic of China. University of Chinese Academy of Sciences Beijing 100049 People’s Republic of China National Centre for Nuclear Research Warsaw 02-093 Poland Institute of Physics and Technology Peace Avenue 54B Ulaanbaatar 13330 Mongolia INFN Laboratori Nazionali di Frascati I-00044 Frascati Italy INFN Sezione di Ferrara I-44122 Ferrara Italy Carnegie Mellon University Pittsburgh Pennsylvania 15213 USA University of Muenster Wilhelm-Klemm-Strasse 9 48149 Muenster Germany Wuhan University Wuhan 430072 People’s Republic of China Lanzhou University Lanzhou 730000 People’s Republic of China Also at MOE Frontiers Science Center for Rare Isotopes Lanzhou University Lanzhou 730000 People’s Republic of China. Also at Lanzhou Center for Theoretical Physics Lanzhou University Lanzhou 730000 People’s Republic of China. Turkish Accelerator Center Particle Factory Group Istinye University 34010 Istanbul Turkey Nankai University Tianjin 300071 P

Using 20.3 fb−1 of e+e− collision data collected at a center-of-mass energy of 3.773 GeV with the BESIII detector operating at the BEPCII collider, the branching fractions of three hadronic charm meson decays, D+→ϕπ+π+π−, D+→KS0K+π+π−π0, and D+→KS0K+ω, are measured for the first time to be (0.54±0.19±0.02)×10−4, (2.51±0.34±0.14)×10−4, and (2.02±0.35±0.10)×10−4, respectively. Futhermore, the branching fractions of D+→K+K−π+π+π− and D+→KS0K+η are measured with improved precision, yielding values of (0.66±0.11±0.03)×10−4 and (2.27±0.22±0.05)×10−4, respectively.

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Test of local realism via entangled \(\Lambda \bar{\Lambda }\) system

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Nature Communications 2025年第1期16卷 1-9页

作者： M. Ablikim V. Batozskaya X. Cai G. F. Cao N. Cao J. F. Chang W. L. Chang G. Chen H. S. Chen M. L. Chen T. Chen X. T. Chen Y. B. Chen H. L. Dai Z. Y. Deng B. Ding J. Dong L. Y. Dong M. Y. Dong M. C. Du J. Fang S. S. Fang W. X. Fang Y. Fang C. D. Fu Y. W. Fu W. X. Gong M. H. Gu C. Y. Guan K. L. He Y. K. Heng G. Y. Hou X. T. Hou Z. L. Hou H. M. Hu T. Hu Y. Hu Y. P. Huang Q. Ji X. B. Ji X. L. Ji X. S. Jiang M. Q. Jing R. Kiuchi X. Kui F. Li G. Li H. B. Li Ke Li L. J. Li L. K. Li W. D. Li W. G. Li Xiaoyu Li H. Liang Y. P. Liao T. Lin B. J. Liu C. X. Liu Fang Liu H. M. Liu Huanhuan Liu J. Y. Liu K. Liu P. L. Liu Z. A. Liu X. C. Lou J. G. Lu X. L. Lu Y. P. Lu Z. H. Lu X. L. Luo H. L. Ma J. L. Ma M. M. Ma Q. M. Ma R. Q. Ma X. Y. Ma Z. P. Mao H. Miao X. H. Mo Z. Ning Q. Ouyang R. G. Ping F. Z. Qi S. Qian Z. H. Qin J. F. Qiu G. Rong L. G. Shao H. F. Shen X. Y. Shen J. Y. Shi R. S. Shi X. Shi W. M. Song G. X. Sun H. K. Sun S. S. Sun T. Sun Y. Z. Sun G. Y. Tang B. Wang H. P. Wang K. Wang L. L. Wang Meng Wang Y. F. Wang Y. Q. Wang Yaqian Wang Z. Wang Z. Y. Wang S. P. Wen J. F. Wu L. H. Wu L. J. Wu Z. Wu S. Y. Xiao Y. G. Xie T. Y. Xing C. F. Xu G. F. Xu W. Xu X. Q. Yan H. X. Yang Tao Yang Y. X. Yang Yifan Yang M. Ye J. H. Yin B. X. Yu G. Yu C. Z. Yuan S. C. Yuan X. Q. Yuan Y. Yuan Y. J. Zeng A. Q. Zhang B. L. Zhang B. X. Zhang H. Q. Zhang H. Y. Zhang J. W. Zhang J. Y. Zhang J. Z. Zhang Jiawei Zhang P. Zhang Shuihan Zhang X. M. Zhang Y. H. Zhang Yao Zhang Z. H. Zhang G. Zhao J. Y. Zhao J. Z. Zhao Ling Zhao Y. B. Zhao J. P. Zheng W. J. Zheng L. P. Zhou K. Zhu K. J. Zhu Z. A. Zhu J. H. Zou M. N. Achasov N. Yu. Muchnoi I. B. Nikolaev P. Adlarson T. Johansson A. Kupsc K. Schoenning V. Thoren M. Wolke X. C. Ai S. X. Du B. C. Ke D. M. Li Y. Liu W. C. Yan Q. Y. Zhang Y. T. Zhang S. J. Zhao R. Aliberti N. Berger A. Denig W. Gradl C. H. Heinz N. Hüsken H. Leithoff M. Lellmann T. Lenz J. Muskalla S. Plura C. F. Redmer Y. Schelhaas F. Stieler A. Amoroso F. Bianchi E. Bianco A. Bortone M. Destefanis F. De Mori M. Greco L. Lavezzi M. Maggio Institute of High Energy Physics Beijing 100049 People’s Republic of China National Centre for Nuclear Research Warsaw Poland State Key Laboratory of Particle Detection and Electronics Beijing 100049 Hefei 230026 People’s Republic of China University of Chinese Academy of Sciences Beijing 100049 People’s Republic of China University of Jinan Jinan 250022 People’s Republic of China University of Science and Technology of China Hefei 230026 People’s Republic of China Jilin University Changchun 130012 People’s Republic of China Hebei University Baoding 071002 People’s Republic of China Budker Institute of Nuclear Physics SB RAS (BINP) Novosibirsk Russia Uppsala University Box 516 Uppsala Sweden Zhengzhou University Zhengzhou 450001 People’s Republic of China Lanzhou University Lanzhou 730000 People’s Republic of China Liaoning Normal University Dalian 116029 People’s Republic of China Johannes Gutenberg University of Mainz Johann-Joachim-Becher-Weg 45 Mainz Germany Indiana University Bloomington Indiana IN USA University of Turin and INFN University of Turin Turin Italy INFN Turin Italy University of Eastern Piedmont Alessandria Italy Southeast University Nanjing 211100 People’s Republic of China Joint Institute for Nuclear Research Dubna Moscow region Russia INFN Sezione di Ferrara INFN Sezione di Ferrara Ferrara Italy University of Ferrara Ferrara Italy Peking University Beijing 100871 People’s Republic of China Institute of Physics and Technology Peace Avenue 54B Ulaanbaatar Mongolia INFN Laboratori Nazionali di Frascati INFN Laboratori Nazionali di Frascati Frascati Italy Carnegie Mellon University Pittsburgh PA USA University of Muenster Wilhelm-Klemm-Strasse 9 Muenster Germany Wuhan University Wuhan 430072 People’s Republic of China Nankai University Tianjin 300071 People’s Republic of China Institute of Modern Physics Lanzhou 730000 People’s Republic of China Turkish Accelerator Center Particle Factory Group Istinye Unive

The non-locality of quantum correlations is a fundamental feature of quantum theory. The Bell inequality serves as a benchmark for distinguishing between predictions made by quantum theory and local hidden variable theory (LHVT). Recent advancements in photon-entanglement experiments have addressed potential loopholes and have observed significant violations of variants of Bell inequality. However, examples of Bell inequalities violation in high energy physics are scarce. In this study, we utilize (10.087 ± 0.044) × 109J/ψevents collected with the BES-III detector at the BEPCII collider, performing non-local correlation tests using the entangled hyperon pairs. The massive-entangled\(\Lambda \bar{\Lambda }\)systems are formed and decay through strong and weak interactions, respectively. Through measurements of the angular distribution of\(p\bar{p}\)inJ/ψ→γηcand subsequent\({\eta }_{c}\to \Lambda (p{\pi }^{-})\bar{\Lambda }(\bar{p}{\pi }^{+})\)cascade decays, a significant violation of LHVT predictions is observed. The exclusion of LHVT is found to be statistically significant at a level exceeding 5.2σin the testing of three Bell-like inequalities.

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Search for the radiative decays D⁺→ γρ⁺ and D⁺→ γK^*+

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Journal of High Energy Physics 2024年第12期2024卷 1-19页

作者： Ablikim, M. Achasov, M.N. Adlarson, P. Afedulidis, O. Ai, X.C. Aliberti, R. Amoroso, A. An, Q. Bai, Y. Bakina, O. Balossino, I. Ban, Y. Bao, H.-R. Batozskaya, V. Begzsuren, K. Berger, N. Berlowski, M. Bertani, M. Bettoni, D. Bianchi, F. Bianco, E. Bortone, A. Boyko, I. Briere, R.A. Brueggemann, A. Cai, H. Cai, X. Calcaterra, A. Cao, G.F. Cao, N. Cetin, S.A. Chai, X.Y. Chang, J.F. Che, G.R. Che, Y.Z. Chelkov, G. Chen, Chao Chen, C.H. Chen, G. Chen, H.S. Chen, H.Y. Chen, M.L. Chen, S.J. Chen, S.L. Chen, S.M. Chen, T. Chen, X.R. Chen, X.T. Chen, Y.B. Chen, Y.Q. Chen, Z.J. Chen, Z.Y. Choi, S.K. Cibinetto, G. Cossio, F. Cui, J.J. Dai, H.L. Dai, J.P. Dbeyssi, A. de Boer, R.E. Dedovich, D. Deng, C.Q. Deng, Z.Y. Denig, A. Denysenko, I. Destefanis, M. De Mori, F. Ding, B. Ding, X.X. Ding, Y. Dong, J. Dong, L.Y. Dong, M.Y. Dong, X. Du, M.C. Du, S.X. Duan, Y.Y. Duan, Z.H. Egorov, P. Fan, Y.H. Fang, J. Fang, S.S. Fang, W.X. Fang, Y. Fang, Y.Q. Farinelli, R. Fava, L. Feldbauer, F. Felici, G. Feng, C.Q. Feng, J.H. Feng, Y.T. Fritsch, M. Fu, C.D. Fu, J.L. Fu, Y.W. Gao, H. Gao, X.B. Gao, Y.N. Gao, Yang Garbolino, S. Garzia, I. Ge, L. Ge, P.T. Ge, Z.W. Geng, C. Gersabeck, E.M. Gilman, A. Goetzen, K. Gong, L. Gong, W.X. Gradl, W. Gramigna, S. Greco, M. Gu, M.H. Gu, Y.T. Guan, C.Y. Guo, A.Q. Guo, L.B. Guo, M.J. Guo, R.P. Guo, Y.P. Guskov, A. Gutierrez, J. Han, K.L. Han, T.T. Hanisch, F. Hao, X.Q. Harris, F.A. He, K.K. He, K.L. Heinsius, F.H. Heinz, C.H. Heng, Y.K. Herold, C. Holtmann, T. Hong, P.C. Hou, G.Y. Hou, X.T. Hou, Y.R. Hou, Z.L. Hu, B.Y. Hu, H.M. Hu, J.F. Hu, S.L. Hu, T. Hu, Y. Huang, G.S. Huang, K.X. Huang, L.Q. Huang, X.T. Huang, Y.P. Huang, Y.S. Hussain, T. Hölzken, F. Hüsken, N. in der Wiesche, N. Jackson, J. Janchiv, S. Jeong, J.H. Ji, Q. Ji, Q.P. Ji, W. Ji, X.B. Ji, X.L. Ji, Y.Y. Jia, X.Q. Jia, Z.K. Jiang, D. Jiang, H.B. Jiang, P.C. Jiang, S.S. Jiang, T.J. Jiang, X.S. Jiang, Y. Jiao, J.B. Jiao, J.K. Jiao, Z. Jin, S. Jin, Y. Jing, M.Q. Jing, X.M. Johansson, T. Kabana, S. Kalantar-Nayestanaki, N. Kang, X.L. Kang, X.S. Institute of High Energy Physics Beijing 100049 China Beihang University Beijing 100191 China Bochum Ruhr-University Bochum D-44780 Germany Budker Institute of Nuclear Physics SB RAS (BINP) Novosibirsk 630090 Russian Federation Carnegie Mellon University Pittsburgh 15213 PA United States Central China Normal University Wuhan 430079 China Central South University Changsha 410083 China China Center of Advanced Science and Technology Beijing 100190 China China University of Geosciences Wuhan 430074 China Chung-Ang University Seoul 06974 South Korea COMSATS University Islamabad Lahore Campus Defence Road Off Raiwind Road Lahore 54000 Pakistan Fudan University Shanghai 200433 China GSI Helmholtzcentre for Heavy Ion Research GmbH Darmstadt D-64291 Germany Guangxi Normal University Guilin 541004 China Guangxi University Nanning 530004 China Hangzhou Normal University Hangzhou 310036 China Hebei University Baoding 071002 China Helmholtz Institute Mainz Staudinger Weg 18 Mainz D-55099 Germany Henan Normal University Xinxiang 453007 China Henan University Kaifeng 475004 China Henan University of Science and Technology Luoyang 471003 China Henan University of Technology Zhengzhou 450001 China Huangshan College Huangshan 245000 China Hunan Normal University Changsha 410081 China Hunan University Changsha 410082 China Indian Institute of Technology Madras Chennai 600036 India Indiana University Bloomington 47405 IN United States INFN Laboratori Nazionali di Frascati Frascati I-00044 Italy INFN Sezione di Perugia Perugia I-06100 Italy University of Perugia Perugia I-06100 Italy INFN Sezione di Ferrara Ferrara I-44122 Italy University of Ferrara Ferrara I-44122 Italy Inner Mongolia University Hohhot 010021 China Institute of Modern Physics Lanzhou 730000 China Institute of Physics and Technology Peace Avenue 54B Ulaanbaatar 13330 Mongolia Instituto de Alta Investigación Universidad de Tarapacá Casilla 7D Arica 100

We search for the radiative decays D+ → γρ+ and D+ → γK*+ using 20.3 fb−1 of e+e− annihilation data collected at the center-of-mass energy s = 3.773 GeV by the BESIII detector operating at the BEPCII collider. No... 详细信息

We search for the radiative decays D⁺ → γρ⁺ and D⁺ → γK^*+ using 20.3 fb⁻¹ of e⁺e⁻ annihilation data collected at the center-of-mass energy s = 3.773 GeV by the BESIII detector operating at the BEPCII collider. No significant signals are observed, and the upper limits on the branching fractions of D⁺→ γρ⁺ and D⁺→ γK^*+ at 90% confidence level are set to be 1.3 × 10⁻⁵ and 1.8 × 10⁻⁵, respectively. © The Author(s) 2024.

关键词： Charm Physics e+-e− Experiments

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Study of the decay D0→K¯0π−e+νe

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Physical Review D 2019年第1期99卷 011103(R)-011103(R)页

作者： M. Ablikim M. N. Achasov S. Ahmed M. Albrecht M. Alekseev A. Amoroso F. F. An Q. An 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 A. Calcaterra G. F. Cao S. A. Cetin J. Chai J. F. Chang W. L. 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 F. Feldbauer G. Felici C. Q. Feng 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 L. M. Gu M. H. Gu Y. T. Gu A. Q. Guo L. B. Guo R. P. Guo Y. P. Guo A. Guskov Z. Haddadi S. Han X. Q. Hao F. A. Harris K. L. 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 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 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. Kuemmel M. Kuessner A. Kupsc M. Kurth W. Kühn J. S. Lange P. Larin L. Lavezzi S. Leiber 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 K. J. Li Kang Li Ke Li Lei Li P. L. Li P. R. Li Q. Y. Li T. 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. Y. Liu Ke Liu L. D. Liu Q. Liu S. B. Liu X. Liu Y. B. Liu Z. A. Liu Z 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 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 430

We report a study of the decay D0→K¯0π−e+νe based on a sample of 2.93 fb−1 e+e− annihilation data collected at the center-of-mass energy of 3.773 GeV with the BESIII detector at the BEPCII collider. The total branching fraction is determined to be B(D0→K¯0π−e+νe)=(1.434±0.029(stat.)±0.032(syst.))%, which is the most precise to date. According to a detailed analysis of the involved dynamics, we find this decay is dominated with the K*(892)− contribution and present an improved measurement of its branching fraction to be B(D0→K*(892)−e+νe)=(2.033±0.046(stat.)±0.047(syst.))%. We further access their hadronic form-factor ratios for the first time as rV=V(0)/A1(0)=1.46±0.07(stat.)±0.02(syst.) and r2=A2(0)/A1(0)=0.67±0.06(stat.)±0.01(syst.). In addition, we observe a significant K¯0π− S-wave component accounting for (5.51±0.97(stat.)±0.62(syst.))% of the total decay rate.

关键词： Branching fraction Form factors Leptonic, semileptonic & radiative decays

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Measurement of the branching fraction of J/ψ→ωη′π+π− and search for J/ψ→ωX(1835), X(1835)→η′π+π− decay

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Physical Review D 2019年第7期99卷 071101(R)-071101(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 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 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 A. Gilman K. Goetzen L. Gong W. X. Gong W. Gradl M. Greco L. M. Gu M. H. 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 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 Z. L. 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 T. Khan 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. L. Li X. N. Li X. Q. Li X. H. 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 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. Y. Liu Ke Liu Q. Liu S. B. 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 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 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 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 Cxuhina University of Ferrara I-44122 Ferrara Italy University of Eastern Piedmont I-15121 Alessandria Italy University of Minnesota Min

Using a sample of 1.31×109 J/ψ events collected by the BESIII detector at BEPCII during 2009 and 2012, we study the J/ψ→ωη′π+π− hadronic process. For the first time, we measure the branching ratio B(J/ψ→ωη′π+π−)=(1.12±0.02±0.13)×10−3. We search for the X(1835) state in the η′π+π− invariant mass spectra. No evidence is found and we estimate the upper limit on the branching fraction at 90% confidence level to be B(J/ψ→ωX(1835),X(1835)→η′π+π−)<6.2×10−5.

关键词： Strong interaction

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Measurement of the absolute branching fraction of Ds0*(2317)±→π0Ds±

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Physical Review D 2018年第5期97卷 051103(R)-051103(R)页

作者： M. Ablikim M. N. Achasov S. Ahmed M. Albrecht A. Amoroso F. F. An Q. An J. Z. Bai Y. Bai O. Bakina R. Baldini Ferroli Y. Ban D. W. Bennett J. V. Bennett N. Berger M. Bertani D. Bettoni J. M. Bian 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 X. K. Chu G. Cibinetto 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 X. 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 I. Garzia K. Goetzen L. Gong W. X. Gong W. Gradl M. Greco M. H. Gu S. Gu Y. T. Gu A. Q. Guo L. B. Guo R. P. Guo Y. P. Guo Z. Haddadi S. Han X. Q. Hao F. A. Harris K. L. He X. Q. He F. H. Heinsius T. Held Y. K. Heng T. Holtmann Z. L. Hou C. Hu H. M. 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 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. L. Kang X. S. Kang M. Kavatsyuk B. C. Ke T. Khan A. Khoukaz P. Kiese R. Kliemt L. Koch O. B. Kolcu B. Kopf M. Kornicer M. Kuemmel M. Kuessner M. Kuhlmann A. Kupsc W. Kühn J. S. Lange M. Lara P. Larin L. Lavezzi S. Leiber H. Leithoff C. Leng C. Li Cheng Li D. M. Li F. Li F. Y. Li G. Li H. B. Li H. J. Li J. C. Li J. Q. Li K. J. Li Kang Li Ke Li Lei Li P. L. Li P. R. Li Q. Y. Li T. 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 D. X. Lin B. Liu B. J. Liu C. X. Liu D. Liu F. H. Liu Fang Liu Feng Liu H. B. Liu H. M. Liu Huanhuan Liu Huihui Liu J. B. Liu J. P. Liu J. Y. Liu K. Liu K. Y. Liu Ke Liu L. D. Liu P. L. Liu Q. Liu S. B. Liu X. Liu Y. B. Liu Z. A. Liu Zhiqing Liu Y. F. Long X. C. Lou H. J. 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 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 University of Minnesota Minneapolis Minnesota 55455 USA 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

The process e+e−→Ds*+Ds0*(2317)−+c.c. is observed for the first time with the data sample of 567 pb−1 collected with the BESIII detector operating at the BEPCII collider at a center-of-mass energy s=4.6 GeV. The statistical significance of the Ds0*(2317)± signal is 5.8σ and the mass is measured to be (2318.3±1.2±1.2) MeV/c2. The absolute branching fraction B(Ds0*(2317)±→π0Ds±) is measured as 1.00−0.14+0.00(stat)−0.14+0.00(syst) for the first time. The uncertainties are statistical and systematic, respectively.

关键词： Branching fraction Hadronic decays

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Measurement of Λ baryon polarization in e+e−→ΛΛ¯ at s=3.773 GeV

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Physical Review D 2022年第1期105卷 L011101-L011101页

作者： M. Ablikim M. N. Achasov P. Adlarson S. Ahmed M. Albrecht R. Aliberti A. Amoroso M. R. An Q. An X. H. Bai Y. Bai O. Bakina R. Baldini Ferroli I. Balossino Y. Ban K. Begzsuren N. Berger M. Bertani D. Bettoni F. Bianchi 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 Z. J. 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 X. Dong S. X. Du P. Egorov Y. L. Fan J. Fang S. S. Fang Y. Fang R. Farinelli L. Fava F. Feldbauer G. Felici C. Q. Feng J. H. Feng M. Fritsch C. D. Fu Y. Gao Y. G. Gao I. Garzia P. T. Ge C. Geng E. M. Gersabeck A. Gilman K. Goetzen L. Gong W. X. Gong W. Gradl M. Greco L. M. Gu M. H. Gu C. Y. Guan A. Q. Guo L. B. Guo R. P. Guo Y. P. Guo A. Guskov T. T. Han W. Y. Han X. Q. Hao F. A. Harris K. K. He K. L. He F. H. Heinsius C. H. Heinz Y. K. Heng C. Herold M. Himmelreich T. Holtmann G. Y. Hou 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 N. Hüsken 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 M. Q. Jing 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 Z. H. Lei 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 H. N. Li J. L. Li J. Q. Li J. S. Li Ke Li L. K. Li Lei Li P. R. Li S. Y. Li W. D. Li W. G. Li X. H. Li X. L. Li Xiaoyu Li Z. Y. Li H. Liang Y. F. Liang Y. T. Liang G. R. Liao L. Z. Liao J. Libby A. Limphirat C. X. Lin D. X. 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 Staudinger Weg 18 D-55099 Mainz Germany Bochum Ruhr-University D-44780 Bochum Germany Johannes Gutenberg University of Mainz Johann-Joachim-Becher-Weg 45 D-55099 Mainz Germany University of Turin I-10125 Turin Italy INFN I-10125 Turin Italy Liaoning Normal University Dalian 116029 People’s Republic of China 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 University of Muenster Wilhelm-Klemm-Str. 9 48149 Muenster Germany Carnegie Mellon University Pittsburgh Pennsylvania 15213 USA Wuhan University Wuhan 430072 People’s Republic of China University of Chinese Academy of Sciences Beijing 100049 People’s Republic of China Istinye University 34010 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 Hunan University Changsha 410082 People’s Republic of China Nankai University Tianjin 300071 People’s Republic of China Yunnan University Kunming 650500 People’s Republic of China Liaoning University Shenyang 110036 People’s Republic of China Zhengzhou University Zhengzhou 450001 Peo

Using a data sample of ψ(3770) events collected with the BESIII detector at BEPCII corresponding to an integrated luminosity of 2.9 fb−1, we report a measurement of Λ spin polarization in e+e−→ΛΛ¯ at s=3.773 GeV. The significance of polarization is found to be 2σ including the systematic uncertainty, which implies a zero phase between the transition amplitudes of the ΛΛ¯ helicity states. This phase can be interpreted in terms of psionic form factors, and is determined to be ΔΦΨ=ΦEΨ−ΦMΨ=(71−46+66±5)°. Similarly, the ratio between the form factors is found to be Rψ=|GEΨ/GMΨ|=0.48−0.35+0.21±0.03. The first uncertainties are statistical and the second systematic.

关键词： Form factors Hadronic decays Polarization in interactions & scattering

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Observation of the Y(4220) and Y(4390) in the process e+e−→ηJ/ψ

引用

Physical Review D 2020年第3期102卷 031101(R)-031101(R)页

作者： M. Ablikim M. N. Achasov P. Adlarson S. Ahmed M. Albrecht 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 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. B. 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 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 Z. Huang N. Huesken T. Hussain W. Ikegami Andersson W. Imoehl M. Irshad S. Jaeger S. Janchiv 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 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 L. Lavezzi H. Leithoff M. Lellmann T. Lenz C. Li C. H. Li Cheng Li D. M. Li F. Li G. 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. B. Li Z. Y. Li H. Liang Y. F. Liang Y. T. Liang 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. 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 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 Universi

The cross sections of the process e+e−→ηJ/ψ at center-of-mass energies (s) between 3.81 and 4.60 GeV are measured with high precision by using data samples collected with the BESIII detector operating at the BEPCII storage ring. Three structures are observed by analyzing the line shape of the measured cross sections, and a maximum-likelihood fit including three resonances is performed by assuming the lowest lying structure is the ψ(4040). For the other resonances, we obtain masses of (4218.6±3.8±2.5) and (4382.0±13.3±1.7) MeV/c2 with corresponding widths of (82.0±5.7±0.4) and (135.8±60.8±22.5) MeV, respectively, where the first uncertainties are statistical and the second ones systematic. The measured resonant parameters are consistent with those of the Y(4220) and Y(4390) from previous measurements of different final states. For the first time, we observe the decays of the Y(4220) and Y(4390) into ηJ/ψ final states.

关键词： Particle decays Particle phenomena Particle production

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