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arXiv 2021年

作者： Ablikim, M. Achasov, M.N. Adlarson, P. Ahmed, S. Albrecht, M. Aliberti, R. Amoroso, A. An, M.R. An, Q. Bai, X.H. Bai, Y. Bakina, O. Ferroli, R. Baldini Balossino, I. Ban, Y. Begzsuren, K. Berger, N. Bertani, M. Bettoni, D. Bianchi, F. Bloms, J. Bortone, A. Boyko, I. Briere, R.A. Cai, H. Cai, X. Calcaterra, A. Cao, G.F. Cao, N. Cetin, S.A. Chang, J.F. Chang, W.L. Chelkov, G. Chen, D.Y. Chen, G. Chen, H.S. Chen, M.L. Chen, S.J. Chen, X.R. Chen, Y.B. Chen, Z.J. Cheng, W.S. Cibinetto, G. Cossio, F. Cui, X.F. Dai, H.L. Dai, X.C. Dbeyssi, A. de Boer, R.E. 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. Dong, X. Du, S.X. Fan, Y.L. Fang, J. Fang, S.S. Fang, Y. Farinelli, R. Fava, L. Feldbauer, F. Felici, G. Feng, C.Q. Feng, J.H. Fritsch, M. Fu, C.D. Gao, Y. Gao, Y. Gao, Y. Gao, Y.G. Garzia, I. Ge, P.T. 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, S. Gu, Y.T. Guan, C.Y. Guo, A.Q. Guo, L.B. Guo, R.P. Guo, Y.P. Guskov, A. Han, T.T. Han, W.Y. Hao, X.Q. Harris, F.A. Hüsken, N. He, K.L. Heinsius, F.H. Heinz, C.H. Held, T. Heng, Y.K. Herold, C. Himmelreich, M. Holtmann, T. Hou, G.Y. Hou, Y.R. Hou, Z.L. Hu, H.M. Hu, J.F. Hu, T. Hu, Y. Huang, G.S. Huang, L.Q. Huang, X.T. Huang, Y.P. Huang, Z. Hussain, T. Andersson, W. Ikegami Imoehl, W. Irshad, M. Jaeger, S. Janchiv, S. Ji, Q. Ji, Q.P. Ji, X.B. Ji, X.L. Ji, Y.Y. Jiang, H.B. Jiang, X.S. Jiao, J.B. Jiao, Z. Jin, S. Jin, Y. Jing, M.Q. 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.G. Kühn, W. Lane, J.J. Lange, J.S. Larin, P. Lavania, A. Lavezzi, 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 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 Staudinger Weg 18 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 Sezione di Perugia PerugiaI-06100 Italy University of Perugia PerugiaI-06100 Italy INFN Sezione di Ferrara FerraraI-44122 Italy University of Ferrara FerraraI-44122 Italy Institute of Modern Physics Lanzhou730000 China Institute of Physics and Technology Peace Ave. 54B Ulaanbaatar13330 Mongolia Jilin University Changchun130012 China Johannes Gutenberg University of Mainz Johann-Joachim-Becher-Weg 45 MainzD-55099 Germany Joint Institute for Nuclear Research Moscow region Dubna141980 Russia Justus-Liebig-Universitaet Giessen II. Physikalisches Institut Heinrich-Buff-Ring 16 GiessenD-35392 Germany Lanzhou University Lanzhou730000 China Liaoning Normal University Dalian116029 China Liaoning University Shenyang

Using 10.1 × 109 J/ψ events produced by the Beijing Electron Positron Collider (BEPCII) at a center-of-mass energy √s = 3.097 GeV and collected with the BESIII detector, we present a search for the rare semi-leptonic decay J/ψ → D−e+νe + c.c. No excess of signal above background is observed, and an upper limit on the branching fraction B(J/ψ → D−e+νe + c.c.) −8 is obtained at 90% confidence level. This is an improvement of more than two orders of magnitude over the previous best limit. Copyright © 2021, The Authors. All rights reserved.

关键词： Germanium alloys

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Search for the decay D0 → π0νν¯

arXiv

引用

arXiv 2021年

作者： Ablikim, M. Achasov, M.N. Adlarson, P. Ahmed, S. Albrecht, M. Aliberti, R. Amoroso, A. An, Q. Anita Bai, X.H. Bai, Y. Bakina, O. Baldini Ferroli, R. Balossino, I. Ban, Y. Begzsuren, K. Berger, N. Bertani, M. Bettoni, D. Bianchi, F. Biernat, J. Bloms, J. Bortone, A. Boyko, I. Briere, R.A. Cai, H. Cai, X. Calcaterra, A. Cao, G.F. Cao, N. Cetin, S.A. Chang, J.F. Chang, W.L. Chelkov, G. Chen, D.Y. Chen, G. Chen, H.S. Chen, M.L. Chen, S.J. Chen, X.R. Chen, Y.B. Chen, Z.J. Cheng, W.S. Cibinetto, G. Cossio, F. Cui, X.F. Dai, H.L. Dai, X.C. Dbeyssi, A. de Boer, R.B. 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. Dong, X. Du, S.X. 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, Y. Gao, Y. Gao, Y. Gao, Y.G. 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. Guan, C.Y. Guo, A.Q. Guo, L.B. Guo, R.P. Guo, Y.P. Guo, Y.P. Guskov, A. Han, T.T. Hao, X.Q. Harris, F.A. He, K.L. Heinsius, F.H. Heinz, C.H. Held, T. Heng, Y.K. Herold, C. Himmelreich, M. Holtmann, T. Hou, Y.R. Hou, Z.L. Hu, H.M. Hu, J.F. Hu, T. Hu, Y. Huang, G.S. Huang, L.Q. Huang, X.T. Huang, Y.P. Huang, Z. Huesken, N. Hussain, T. Ikegami Andersson, W. Imoehl, W. Irshad, M. Jaeger, S. Janchiv, S. Ji, Q. Ji, Q.P. Ji, X.B. Ji, X.L. Jiang, H.B. Jiang, X.S. Jiang, X.Y. Jiang, Y. Jiao, J.B. Jiao, Z. 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.G. Kühn, W. Lane, J.J. Lange, J.S. Larin, P. Lavezzi, L. Lei, Z.H. Leithoff, H. Lellmann, M. Lenz, T. 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 Sezione di Perugia PerugiaI-06100 Italy University of Perugia PerugiaI-06100 Italy INFN Sezione di Ferrara INFN Sezione di Ferrara FerraraI-44122 Italy Institute of Modern Physics Lanzhou730000 China Institute of Physics and Technology Peace Ave. 54B Ulaanbaatar13330 Mongolia Jilin University Changchun130012 China Johannes Gutenberg University of Mainz Johann-Joachim-Becher-Weg 45 MainzD-55099 Germany Joint Institute for Nuclear Research Dubna Moscow region 141980 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 Normal Univ

We present the first experimental search for the rare charm decay D0 → π0νν¯. It is based on an e+e- collision sample consisting of 10.6 × 106 pairs of D0D¯0 mesons collected by the BESIII detector at √s=3.773 GeV, corresponding to an integrated luminosity of 2.93 fb-1. A data-driven method is used to ensure the reliability of the background modeling. No significant D0 → π0νν¯ signal is observed in data and an upper limit of the branching fraction is set to be 2.1 × 10-4 at the 90% confidence level. This is the first experimental constraint on charmed-hadron decays into dineutrino final states. Copyright © 2021, The Authors. All rights reserved.

关键词： Hadrons

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Observation of D0(+)→KS0π0(+)ω and improved measurement of D0→K−π+ω

引用

Physical Review D 2022年第3期105卷 032009-032009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 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 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 S. Gu Y. T. Gu C. Y. Guan A. Q. Guo L. B. Guo R. P. Guo Y. P. Guo Yupei Guo A. Guskov T. T. Han W. Y. Han X. Q. Hao F. A. Harris N. Hüsken K. L. He F. H. Heinsius C. H. Heinz T. Held Y. K. Heng C. Herold 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 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 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 C. X. Lin B. J. Liu C. X. Liu D. Liu F. H. Liu Fang Liu 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 Avenue 54B Ulaanbaatar 13330 Mongolia University of Muenster Wilhelm-Klemm-Street 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 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 Hunan University Changsha 410082 People’s Republic of China Nankai University Tianjin 300071 People’s Republic of China Liaoning University Shenyang 110036 People’s Republic of China Zhengzhou University Zhengzhou 45000

By analyzing an e+e− annihilation data sample with an integrated luminosity of 2.93 fb−1 taken at the center-of-mass energy of 3.773 GeV with the BESIII detector, we determine the absolute branching fractions of the hadronic decays D0→K−π+ω, D0→KS0π0ω, and D+→KS0π+ω to be (3.392±0.044stat±0.085syst)%, (0.848±0.046stat±0.031syst)%, and (0.707±0.041stat±0.029syst)%, respectively. The accuracy of the branching fraction measurement of the decay D0→K−π+ω is improved by a factor of seven compared to the world average value. The D0→KS0π0ω and D+→KS0π+ω decays are observed for the first time.

关键词： Particle interactions

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Observation of e+e− → ηψ(2S) at center-of-mass energies from 4.236 to 4.600 GeV

arXiv

引用

arXiv 2021年

作者： Ablikim, M. Achasov, M.N. Adlarson, P. Ahmed, S. Albrecht, M. Aliberti, R. Amoroso, A. An, M.R. An, Q. Bai, X.H. Bai, Y. Bakina, O. Ferroli, R. Baldini Balossino, I. Ban, Y. Begzsuren, K. Berger, N. Bertani, M. Bettoni, D. Bianchi, F. Bloms, J. Bortone, A. Boyko, I. Briere, R.A. Cai, H. Cai, X. Calcaterra, A. Cao, G.F. Cao, N. Cetin, S.A. Chang, J.F. Chang, W.L. Chelkov, G. Chen, D.Y. Chen, G. Chen, H.S. Chen, M.L. Chen, S.J. Chen, X.R. Chen, Y.B. Chen, Z.J. Cheng, W.S. Cibinetto, G. Cossio, F. Cui, X.F. Dai, H.L. Dai, X.C. Dbeyssi, A. de Boer, R.E. 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. Dong, X. Du, S.X. Fan, Y.L. Fang, J. Fang, S.S. Fang, Y. Farinelli, R. Fava, L. Feldbauer, F. Felici, G. Feng, C.Q. Feng, J.H. Fritsch, M. Fu, C.D. Gao, Y. Gao, Y. Gao, Y. Gao, Y.G. Garzia, I. Ge, P.T. 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, S. Gu, Y.T. Guan, C.Y. Guo, A.Q. Guo, L.B. Guo, R.P. Guo, Y.P. Guskov, A. Han, T.T. Han, W.Y. Hao, X.Q. Harris, F.A. He, K.L. Heinsius, F.H. Heinz, C.H. Held, T. Heng, Y.K. Herold, C. Himmelreich, M. Holtmann, T. Hou, G.Y. Hou, Y.R. Hou, Z.L. Hu, H.M. Hu, J.F. Hu, T. Hu, Y. Huang, G.S. Huang, L.Q. Huang, X.T. Huang, Y.P. Huang, Z. Hussain, T. Hüsken, N. Andersson, W. Ikegami Imoehl, W. Irshad, M. Jaeger, S. Janchiv, S. Ji, Q. Ji, Q.P. Ji, X.B. Ji, X.L. Ji, Y.Y. Jiang, H.B. Jiang, X.S. Jiao, J.B. Jiao, Z. Jin, S. Jin, Y. Jing, M.Q. 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.G. Kühn, W. Lane, J.J. Lange, J.S. Larin, P. Lavania, A. Lavezzi, L. Lei, Z.H. 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 Staudinger Weg 18 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 Italy INFN Laboratori Nazionali di Frascati FrascatiI-00044 Italy INFN Sezione di Perugia PerugiaI-06100 Italy INFN Sezione di Ferrara Italy INFN Sezione di Ferrara FerraraI-44122 Italy University of Ferrara FerraraI-44122 Italy Institute of Modern Physics Lanzhou730000 China Institute of Physics and Technology Peace Ave. 54B Ulaanbaatar13330 Mongolia Jilin University Changchun130012 China 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 Lanzhou University Lanzhou730000 China Liaoning Normal University Dalian116029 China L

Using a total of 5.25 fb−1 of e+e− collision data with center-of-mass energies from 4.236 to 4.600 GeV, we report the first observation of the process e+e− → ηψ(2S) with a statistical significance of 5σ. The data sets were collected by the BESIII detector operating at the BEPCII storage ring. We measure the yield of events integrated over center-of-mass energies and also present the energy dependence of the measured cross section. Copyright © 2021, The Authors. All rights reserved.

关键词： Germanium alloys

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Measurements of Born cross sections of e+e− → Ds∗+D−sJ + c.c.

arXiv

引用

arXiv 2021年

作者： Ablikim, M. Achasov, M.N. Adlarson, P. Ahmed, S. Albrecht, M. Aliberti, R. Amoroso, A. An, M.R. An, Q. Bai, X.H. Bai, Y. Bakina, O. Baldini Ferroli, R. Balossino, I. Ban, Y. Begzsuren, K. Berger, N. Bertani, M. Bettoni, D. Bianchi, F. Bloms, J. Bortone, A. Boyko, I. Briere, R.A. Cai, H. Cai, X. Calcaterra, A. Cao, G.F. Cao, N. Cetin, S.A. Chang, J.F. Chang, W.L. Chelkov, G. Chen, D.Y. Chen, G. Chen, H.S. Chen, M.L. Chen, S.J. Chen, X.R. Chen, Y.B. Chen, Z.J. Cheng, W.S. Cibinetto, G. Cossio, F. Cui, X.F. Dai, H.L. Dai, X.C. Dbeyssi, A. de Boer, R.E. 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. Dong, X. Du, S.X. Fan, Y.L. Fang, J. Fang, S.S. Fang, Y. Farinelli, R. Fava, L. Feldbauer, F. Felici, G. Feng, C.Q. Feng, J.H. Fritsch, M. Fu, C.D. Gao, Y. Gao, Y. Gao, Y. Gao, Y.G. Garzia, I. Ge, P.T. 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, S. Gu, Y.T. Guan, C.Y. Guo, A.Q. Guo, L.B. Guo, R.P. Guo, Y.P. Guskov, A. Han, T.T. Han, W.Y. Hao, X.Q. Harris, F.A. He, K.L. Heinsius, F.H. Heinz, C.H. Held, T. Heng, Y.K. Herold, C. Himmelreich, M. Holtmann, T. Hou, G.Y. Hou, Y.R. Hou, Z.L. Hu, H.M. Hu, J.F. Hu, T. Hu, Y. Huang, G.S. Huang, L.Q. Huang, X.T. Huang, Y.P. Huang, Z. Hussain, T. Hüsken, N. Ikegami Andersson, W. Imoehl, W. Irshad, M. Jaeger, S. Janchiv, S. Ji, Q. Ji, Q.P. Ji, X.B. Ji, X.L. Ji, Y.Y. Jiang, H.B. Jiang, X.S. Jiao, J.B. Jiao, Z. Jin, S. Jin, Y. Jing, M.Q. 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.G. Kühn, W. Lane, J.J. Lange, J.S. Larin, P. Lavania, A. Lavezzi, 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 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 Staudinger Weg 18 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 INFN Laboratori Nazionali di Frascati FrascatiI-00044 Italy INFN Sezione di Perugia PerugiaI-06100 Italy University of Perugia PerugiaI-06100 Italy INFN Sezione di Ferrara INFN Sezione di Ferrara FerraraI-44122 Italy University of Ferrara FerraraI-44122 Italy Institute of Modern Physics Lanzhou730000 China Institute of Physics and Technology Peace Ave. 54B Ulaanbaatar13330 Mongolia Jilin University Changchun130012 China Johannes Gutenberg University of Mainz Johann-Joachim-Becher-Weg 45 MainzD-55099 Germany Joint Institute for Nuclear Research Moscow region Dubna141980 Russia Justus-Liebig-Universitaet Giessen II. Physikalisches Institut Heinrich-Buff-Ring 16 GiessenD-35392 Germany Lanzhou University Lanzhou730000 China Liaoning Normal Un

The Born cross sections are measured for the first time for the processes e+e− → Ds∗+Ds∗0(2317)−+ c.c. and e+e− → Ds∗+Ds1(2460)− + c.c. at the center-of-mass energy √s = 4.600 GeV, 4.612 GeV, 4.626_GeV, 4.640 GeV, 4.660 GeV, 4.68 GeV, and 4.700 GeV, and for e+e− → Ds∗+Ds1(2536)−+c.c. at √s = 4.660 GeV, 4.680 GeV, and 4.700 GeV, using data samples collected with the BESIII detector at the BEPCII collider. No structures are observed in cross-section distributions for any of the processes. Copyright © 2021, The Authors. All rights reserved.

关键词： Germanium alloys

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Measurement of the absolute branching fractions for purely leptonic Ds+ decays

arXiv

引用

arXiv 2021年

作者： Ablikim, M. Achasov, M.N. Adlarson, P. Ahmed, S. Albrecht, M. Aliberti, R. Amoroso, A. An, M.R. An, Q. Bai, X.H. Bai, Y. Bakina, O. Ferroli, R. Baldini Balossino, I. Ban, Y. Begzsuren, K. Berger, N. Bertani, M. Bettoni, D. Bianchi, F. Bloms, J. Bortone, A. Boyko, I. Briere, R.A. Cai, H. Cai, X. Calcaterra, A. Cao, G.F. Cao, N. Cetin, S.A. Chang, J.F. Chang, W.L. Chelkov, G. Chen, D.Y. Chen, G. Chen, H.S. Chen, M.L. Chen, S.J. Chen, X.R. Chen, Y.B. Chen, Z.J. Cheng, W.S. Cibinetto, G. Cossio, F. Cui, X.F. Dai, H.L. Dai, X.C. Dbeyssi, A. de Boer, R.E. 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. Dong, X. Du, S.X. Fan, Y.L. Fang, J. Fang, S.S. Fang, Y. Farinelli, R. Fava, L. Feldbauer, F. Felici, G. Feng, C.Q. Feng, J.H. Fritsch, M. Fu, C.D. Gao, Y. Gao, Y. Gao, Y. Gao, Y.G. Garzia, I. Ge, P.T. 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, S. Gu, Y.T. Guan, C.Y. Guo, A.Q. Guo, L.B. Guo, R.P. Guo, Y.P. Guskov, A. Han, T.T. Han, W.Y. Hao, X.Q. Harris, F.A. Hüsken, N. He, K.L. Heinsius, F.H. Heinz, C.H. Held, T. Heng, Y.K. Herold, C. Himmelreich, M. Holtmann, T. Hou, Y.R. Hou, Z.L. Hu, H.M. Hu, J.F. Hu, T. Hu, Y. Huang, G.S. Huang, L.Q. Huang, X.T. Huang, Y.P. Huang, Z. Hussain, T. Andersson, W. Ikegami Imoehl, W. Irshad, M. Jaeger, S. Janchiv, S. Ji, Q. Ji, Q.P. Ji, X.B. Ji, X.L. Ji, Y.Y. Jiang, H.B. Jiang, X.S. Jiao, J.B. Jiao, Z. 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.G. Kühn, W. Lane, J.J. Lange, J.S. Larin, P. Lavania, A. Lavezzi, L. Lei, Z.H. Leithoff, H. 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 Sezione di Perugia PerugiaI-06100 Italy University of Perugia PerugiaI-06100 Italy INFN Sezione di Ferrara FerraraI-44122 Italy University of Ferrara FerraraI-44122 Italy Institute of Modern Physics Lanzhou730000 China Institute of Physics and Technology Peace Ave. 54B Ulaanbaatar13330 Mongolia Jilin University Changchun130012 China 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 Lanzhou University Lanzhou730000 China Liaoning Normal University Dalian116029 China Liaoning University

We report new measurements of the branching fraction B(Ds+ → `+ν), where `+ is either µ+ or τ+(→ π+ν¯τ), based on 6.32 fb−1 of electron-positron annihilation data collected by the BESIII experiment at six center-of-mass energy points between 4.178 and 4.226 GeV. Simultaneously floating the Ds+ → µ+νµ and Ds+ → τ+ντ components yields B(Ds+ → τ+ντ) = (5.21 ±0.25 ±0.17) ×10−2, B(Ds+ → µ+νµ) = (5.35 ± 0.13 ± 0.16) × 10−3, and the ratio of decay widths R = Γ(Γ(DDs+s+→→µτ++νντµ)) = 9.73+0−0.6158 ±0.36, where the first uncertainties are statistical and the second systematic. No evidence of CP asymmetry is observed in the decay rates Ds± → µ±νµ and Ds± → τ±ντ: ACP(µ±ν) = (−1.2 ± 2.5 ± 1.0)% and ACP(τ±ν) = (+2.9 ± 4.8 ± 1.0)%. Constraining our measurement to the Standard Model expectation of lepton universality (R = 9.75), we find the more precise results B(Ds+ → τ+ντ) = (5.22 ± 0.10 ± 0.14) × 10−2 and ACP(τ±ντ) = (−0.1 ± 1.9 ± 1.0)%. Combining our results with inputs external to our analysis, we determine the c → s¯ quark mixing matrix element, Ds+ decay constant, and ratio of the decay constants to be |Vcs| = 0.973 ± 0.009 ± 0.014, fD+ = 249.9 ± 2.4 ± 3.5 MeV, and fDs+ /fD+ = 1.232 ± 0.035, respectively. s Copyright © 2021, The Authors. All rights reserved.

关键词： Uncertainty analysis

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Measurement of branching fractions of J/ψ and ψ(3686) decays to Σ+ and Σ−

arXiv

引用

arXiv 2021年

作者： Ablikim, M. Achasov, M.N. Adlarson, P. Ahmed, S. Albrecht, M. Aliberti, R. Amoroso, A. An, M.R. An, Q. Bai, X.H. Bai, Y. Bakina, O. Baldini Ferroli, R. Balossino, I. Ban, Y. Begzsuren, K. Berger, N. Bertani, M. Bettoni, D. Bianchi, F. Bloms, J. Bortone, A. Boyko, I. Briere, R.A. Cai, H. Cai, X. Calcaterra, A. Cao, G.F. Cao, N. Cetin, S.A. Chang, J.F. Chang, W.L. Chelkov, G. Chen, G. Chen, H.S. Chen, M.L. Chen, S.J. Chen, X.R. Chen, Y.B. Chen, Z.J. Cheng, W.S. Cibinetto, G. Cossio, F. Cui, X.F. Dai, H.L. Dai, J.P. Dai, X.C. Dbeyssi, A. de Boer, R.E. 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. Dong, X. Du, S.X. Fan, Y.L. Fang, J. Fang, S.S. Fang, Y. Farinelli, R. Fava, L. Feldbauer, F. Felici, G. Feng, C.Q. Feng, J.H. Fritsch, M. Fu, C.D. Gao, Y. Gao, Y. Gao, Y. Garzia, I. Ge, P.T. 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, T.T. Han, W.Y. Hao, X.Q. Harris, F.A. He, K.L. Heinsius, F.H. Heinz, C.H. Heng, Y.K. Herold, C. Himmelreich, M. Holtmann, T. Hou, G.Y. Hou, Y.R. Hou, Z.L. Hu, H.M. Hu, J.F. Hu, T. Hu, Y. Huang, G.S. Huang, L.Q. Huang, X.T. Huang, Y.P. Huang, Z. Hussain, T. Hüsken, N. Ikegami Andersson, W. Imoehl, W. Irshad, M. Jaeger, S. Janchiv, S. Ji, Q. Ji, Q.P. Ji, X.B. Ji, X.L. Ji, Y.Y. Jiang, H.B. Jiang, X.S. Jiao, J.B. Jiao, Z. Jin, S. Jin, Y. Jing, M.Q. 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.G. Kühn, W. Lane, J.J. Lange, J.S. Larin, P. Lavania, A. Lavezzi, L. Lei, Z.H. 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 Staudinger Weg 18 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 INFN Laboratori Nazionali di Frascati FrascatiI-00044 Italy INFN Sezione di Perugia PerugiaI-06100 Italy University of Perugia PerugiaI-06100 Italy INFN Sezione di Ferrara INFN Sezione di Ferrara FerraraI-44122 Italy University of Ferrara FerraraI-44122 Italy Institute of Modern Physics Lanzhou730000 China Institute of Physics and Technology Peace Ave. 54B Ulaanbaatar13330 Mongolia Jilin University Changchun130012 China Johannes Gutenberg University of Mainz Johann-Joachim-Becher-Weg 45 MainzD-55099 Germany Joint Institute for Nuclear Research Moscow region Dubna141980 Russia Justus-Liebig-Universitaet Giessen II. Physikalisches Institut Heinrich-Buff-Ring 16 GiessenD-35392 Germany Lanzhou University Lanzhou730000 China Liaoning Normal Un

Using 1310.6 × 106 J/ψ and 448.1 × 106 ψ(3686) events collected with the BESIII detector, the branching fractions of J/ψ decays to Σ+Σ− is measured to be (10.61± 0.04±0.36)×10−4, which is significantly more precise than the current world average. The branching fractions of ψ(3686) decays to Σ+Σ− is measured to be (2.52±0.04±0.09)×10−4, which is consistent with the previous measurements. In addition, the ratio of B(ψ(3686) → Σ+Σ−)/B(J/ψ → Σ+Σ−) is determined to be (23.8 ±1.1)% which violates the "12% rule". © 2021, CC BY-NC-ND.

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Measurement of the absolute branching fraction of inclusive semielectronic Ds+ decays

arXiv

引用

arXiv 2021年

作者： Ablikim, M. Achasov, M.N. Adlarson, P. Ahmed, S. Albrecht, M. Aliberti, R. Amoroso, A. An, M.R. An, Q. Bai, X.H. Bai, Y. Bakina, O. Baldini Ferroli, R. Balossino, I. Ban, Y. Begzsuren, K. Berger, N. Bertani, M. Bettoni, D. Bianchi, F. Bloms, J. Bortone, A. Boyko, I. Briere, R.A. Cai, H. Cai, X. Calcaterra, A. Cao, G.F. Cao, N. Cetin, S.A. Chang, J.F. Chang, W.L. Chelkov, G. Chen, D.Y. Chen, G. Chen, H.S. Chen, M.L. Chen, S.J. Chen, X.R. Chen, Y.B. Chen, Z.J. Cheng, W.S. Cibinetto, G. Cossio, F. Cui, X.F. Dai, H.L. Dai, X.C. Dbeyssi, A. de Boer, R.E. 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. Dong, X. Du, S.X. Fan, Y.L. Fang, J. Fang, S.S. Fang, Y. Farinelli, R. Fava, L. Feldbauer, F. Felici, G. Feng, C.Q. Feng, J.H. Fritsch, M. Fu, C.D. Gao, Y. Gao, Y. Gao, Y. Gao, Y.G. Garzia, I. Ge, P.T. 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, T.T. Han, W.Y. Hao, X.Q. Harris, F.A. He, K.L. Heinsius, F.H. Heinz, C.H. Held, T. Heng, Y.K. Herold, C. Himmelreich, M. Holtmann, T. Hou, G.Y. Hou, Y.R. Hou, Z.L. Hu, H.M. Hu, J.F. Hu, T. Hu, Y. Huang, G.S. Huang, L.Q. Huang, X.T. Huang, Y.P. Huang, Z. Hussain, T. Hüsken, N. Ikegami Andersson, W. Imoehl, W. Irshad, M. Jaeger, S. Janchiv, S. Ji, Q. Ji, Q.P. Ji, X.B. Ji, X.L. Ji, Y.Y. Jiang, H.B. Jiang, X.S. Jiao, J.B. Jiao, Z. Jin, S. Jin, Y. Jing, M.Q. 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.G. Kühn, W. Lane, J.J. Lange, J.S. Larin, P. Lavania, A. Lavezzi, L. Lei, Z.H. 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 Staudinger Weg 18 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 INFN Laboratori Nazionali di Frascati FrascatiI-00044 Italy INFN Sezione di Perugia PerugiaI-06100 Italy University of Perugia PerugiaI-06100 Italy INFN Sezione di Ferrara INFN Sezione di Ferrara FerraraI-44122 Italy University of Ferrara FerraraI-44122 Italy Institute of Modern Physics Lanzhou730000 China Institute of Physics and Technology Peace Ave. 54B Ulaanbaatar13330 Mongolia Jilin University Changchun130012 China Johannes Gutenberg University of Mainz Johann-Joachim-Becher-Weg 45 MainzD-55099 Germany Joint Institute for Nuclear Research Moscow region Dubna141980 Russia Justus-Liebig-Universitaet Giessen II. Physikalisches Institut Heinrich-Buff-Ring 16 GiessenD-35392 Germany Lanzhou University Lanzhou730000 China Liaoning Normal Un

We measure the inclusive semielectronic decay branching fraction of the Ds+ meson. A double-tag technique is applied to e+e− annihilation data collected by the BESIII experiment at the BEPCII collider, operating in the center-of-mass energy range 4.178 − 4.230 GeV. We select positrons from Ds+ → Xe+νe with momenta greater than 200 MeV/c, and determine the laboratory momentum spectrum, accounting for the effects of detector efficiency and resolution. The total positron yield and semielectronic branching fraction are determined by extrapolating this spectrum below the momentum cutoff. We measure the Ds+ semielectronic branching fraction to be B (Ds+ → Xe+νe) = (6.30 ± 0.13 (stat.) ± 0.10 (syst.)) %, showing no evidence for unobserved exclusive semielectronic modes. We combine this result with external data taken from literature to determine the ratio of the Ds+ and D0 semielectronic widths, (Equation presented) = 0.790 ± 0.016 (stat.) ± 0.020 (syst.). Our results are consistent with and more precise than previous measurements. Copyright © 2021, The Authors. All rights reserved.

关键词： Positrons

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Measurement of the Cross Section for e+e− → Hadrons at Energies from 2.2324 to 3.6710 GeV

arXiv

引用

arXiv 2021年

作者： Ablikim, M. Achasov, M.N. Adlarson, P. Ahmed, S. Albrecht, M. Aliberti, R. Amoroso, A. An, M.R. An, Q. Bai, X.H. Bai, Y. Bakina, O. Ferroli, R. Baldini Balossino, I. Ban, Y. Begzsuren, K. Berger, N. Bertani, M. Bettoni, D. Bianchi, F. Bloms, J. Bortone, A. Boyko, I. Briere, R.A. Cai, H. Cai, X. Calcaterra, A. Cao, G.F. Cao, N. Cetin, S.A. Chang, J.F. Chang, W.L. Chelkov, G. Chen, D.Y. Chen, G. Chen, H.S. Chen, M.L. Chen, S.J. Chen, X.R. Chen, Y.B. Chen, Z.J. Cheng, W.S. Cibinetto, G. Cossio, F. Cui, X.F. Dai, H.L. Dai, X.C. Dbeyssi, A. de Boer, R.E. 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. Dong, X. Du, S.X. Fan, Y.L. Fang, J. Fang, S.S. Fang, Y. Farinelli, R. Fava, L. Feldbauer, F. Felici, G. Feng, C.Q. Feng, J.H. Fritsch, M. Fu, C.D. Gao, Y. Gao, Y. Gao, Y.G. Garzia, I. Ge, P.T. Geng, C. Gersabeck, E.M. Gilman, A. Goetzen, K. Gong, L. Gong, W.X. Gradl, W. Greco, M. Gu, L.M. Gu, M.H. Guan, C.Y. Guo, A.Q. Guo, L.B. Guo, R.P. Guo, Y.P. Guskov, A. Han, T.T. Han, W.Y. Hao, X.Q. Harris, F.A. He, K.L. Heinsius, F.H. Heinz, C.H. Heng, Y.K. Herold, C. Himmelreich, M. Holtmann, T. Hou, G.Y. Hou, Y.R. Hou, Z.L. Hu, H.M. Hu, J.F. Hu, T. Hu, Y. Huang, G.S. Huang, L.Q. Huang, X.T. Huang, Y.P. Huang, Z. Hussain, T. Hüsken, N. Andersson, W. Ikegami Imoehl, W. Irshad, M. Jaeger, S. Janchiv, S. Ji, Q. Ji, Q.P. Ji, X.B. Ji, X.L. Ji, Y.Y. Jiang, H.B. Jiang, X.S. Jiao, J.B. Jiao, Z. Jin, S. Jin, Y. Jing, M.Q. 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.G. Kühn, W. Lane, J.J. Lange, J.S. Larin, P. Lavania, A. Lavezzi, L. Lei, Z.H. Leithoff, H. 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 Lahore Campus COMSATS University Islamabad 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 Hangzhou Normal University Hangzhou310036 China Helmholtz Institute Mainz Staudinger Weg 18 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 Indiana Bloomington47405 United States INFN Laboratori Nazionali di Frascati INFN Laboratori Nazionali di Frascati FrascatiI-00044 Italy INFN Sezione di Perugia PerugiaI-06100 Italy University of Perugia PerugiaI-06100 Italy INFN Sezione di Ferrara INFN Sezione di Ferrara FerraraI-44122 Italy University of Ferrara FerraraI-44122 Italy Institute of Modern Physics Lanzhou730000 China Institute of Physics and Technology Peace Avenue 54B Ulaanbaatar13330 Mongolia Jilin University Changchun130012 China Johannes Gutenberg University of Mainz Johann-Joachim-Becher-Weg 45 MainzD-55099 Germany Joint Institute for Nuclear Research Dubna Region Moscow141980 Russia Justus-Liebig-Universitaet Giessen II Physikalisches Institut Heinrich-Buff-Ring 16 GiessenD-35392 Germany Lanzhou University Lanzhou730000 China Liaoning Normal University Dalian116029 China

Based on electron-positron collision data collected with the BESIII detector operating at the Beijing Electron-Positron Collider II storage rings, the value of R ≡ σ(e+e− → hadrons)/σ(e+e− → µ+µ−) is measured at 14 center-of-mass energies from 2.2324 to 3.6710 GeV. The resulting uncertainties are less than 3.0%, and are dominated by systematic uncertainties. © 2021, CC BY.

关键词： Hadrons

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Cross sections for the reactions e+e- → K+K-π+π-(π0), K+K-K+K-(π0), π+π-π+π-(π0), pp¯π+π-(π0) in the energy region between 3.773 and 4.600 GeV

arXiv

引用

arXiv 2021年

作者： Ablikim, M. Achasov, M.N. Adlarson, P. Ahmed, S. Albrecht, M. Aliberti, R. Amoroso, A. An, Q. Anita Bai, X.H. Bai, Y. Bakina, O. Baldini Ferroli, R. Balossino, I. Ban, Y. Begzsuren, K. Berger, N. Bertani, M. Bettoni, D. Bianchi, F. Biernat, J. Bloms, J. Bortone, A. Boyko, I. Briere, R.A. Cai, H. Cai, X. Calcaterra, A. Cao, G.F. Cao, N. Cetin, S.A. Chang, J.F. Chang, W.L. Chelkov, G. Chen, D.Y. Chen, G. Chen, H.S. Chen, M.L. Chen, S.J. Chen, X.R. Chen, Y.B. Chen, Z.J. Cheng, W.S. Cibinetto, G. Cossio, F. Cui, X.F. Dai, H.L. Dai, X.C. Dbeyssi, A. de Boer, R.B. 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. Dong, X. Du, S.X. 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, Y. Gao, Y. Gao, Y. Gao, Y.G. 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. Guan, C.Y. Guo, A.Q. Guo, L.B. Guo, R.P. Guo, Y.P. Guo, Y.P. Guskov, A. Han, T.T. Hao, X.Q. Harris, F.A. He, K.L. Heinsius, F.H. Heinz, C.H. Held, T. Heng, Y.K. Herold, C. Himmelreich, M. Holtmann, T. Hou, Y.R. Hou, Z.L. Hu, H.M. Hu, J.F. Hu, T. Hu, Y. Huang, G.S. Huang, L.Q. Huang, X.T. Huang, Y.P. Huang, Z. Huesken, N. Hussain, T. Ikegami Andersson, W. Imoehl, W. Irshad, M. Jaeger, S. Janchiv, S. Ji, Q. Ji, Q.P. Ji, X.B. Ji, X.L. Jiang, H.B. Jiang, X.S. Jiang, X.Y. Jiang, Y. Jiao, J.B. Jiao, Z. 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.G. Kühn, W. Lane, J.J. Lange, J.S. Larin, P. Lavezzi, L. Lei, Z.H. Leithoff, H. Lellmann, M. Lenz, T. 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 Sezione di Perugia PerugiaI-06100 Italy University of Perugia PerugiaI-06100 Italy INFN Sezione di Ferrara INFN Sezione di Ferrara FerraraI-44122 Italy Institute of Modern Physics Lanzhou730000 China Institute of Physics and Technology Peace Ave. 54B Ulaanbaatar13330 Mongolia Jilin University Changchun130012 China Johannes Gutenberg University of Mainz Johann-Joachim-Becher-Weg 45 MainzD-55099 Germany Joint Institute for Nuclear Research Moscow region Dubna141980 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 Normal Unive

Using the data samples collected in the energy range from 3.773 to 4.600 GeV with the BESIII detector at the BEPCII collider, we measure the dressed cross sections as a function of center-of-mass energy for e+e- → K+K-π+π-(π0), K+K-K+K-(π0), π+π-π+π-(π0), and pp¯π+π-(π0). The cross sections for e+e- → K+K-K+K-π0, pp¯π+π-(π0) are the first measurements. Cross sections for the other five channels are much more precise than previous results in this energy region. We also search for charmonium and charmonium-like resonances, such as the Y (4230), decaying into the same final states. We find evidence of the ψ(4040) decaying to π+π-π+π-π0 with a statistical significance of 3.6σ. Upper limits are provided for other decays since no clear signals are observed. Copyright © 2021, The Authors. All rights reserved.

关键词： Germanium alloys

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