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luminosities and energies of e^(+)e^(−) collision data taken between √s=4.61 GeV and 4.95 GeV at BEsⅢ

Chinese Physics C 2022年第11期46卷 64-75页

作者： M.Ablikim M.n.Achasov P.Adlarson 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 V.Batozskaya D.Becker K.Begzsuren n.Berger M.Bertani D.Bettoni F.Bianchi J.Bloms 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.Chelkov C.Chen G.Chen H.s.Chen M.L.Chen s.J.Chen T.Chen x.R.Chen x.T.Chen y.B.Chen z.J.Chen W.s.Cheng x.Chu G.Cibinetto F.Cossio J.J.Cui H.L.Dai J.P.Dai A.Dbeyssi R.Ede Boer D.Dedovich z.y.Deng A.Denig I.Denysenko M.Destefanis F.De Mori y.Ding J.Dong L.y.Dong M.y.Dong x.Dong s.x.Du P.Egorov y.L.Fan J.Fang s.s.Fang W.x.Fang y.Fang R.Farinelli L.Fava F.Feldbauer G.Felici C.Q.Feng J.H.Feng K Fischer M.Fritsch C.Fritzsch C.D.Fu H.Gao y.n.Gao yang Gao s.Garbolino I.Garzia P.T.Ge C.Geng E.M.Gersabeck A Gilman K.Goetzen L.Gong W.x.Gong W.Gradl M.Greco 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 K.x.Huang L.Q.Huang L.Q.Huang x.T.Huang y.P.Huang z.Huang T.Hussain n Husken W.Imoehl M.Irshad J.Jackson s.Jaeger s.Janchiv Q.Ji Q.P.Ji x.B.Ji x.L.Ji y.y.Ji z.K.Jia H.B.Jiang s.s.Jiang x.s.Jiang y.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 W.Kuhn J.J.Lane J.s.Lange P.Larin A.Lavania L.Lavezzi z.H.Lei H.Leithoff M.Lellmann T.Lenz C.Li C.Li C.H.Li Cheng Li D.M.Li F.Li G.Li H.Li H.Li H.B.Li H.J.Li H.n.Li J.Q.Li J.s.Li J.W.Li Ke Li L.J Li L.K.Li Lei Li M.H.Li P.R.Li s.x.Li s.y.Li T.Li W.D.Li W.G.Li x.H.Li x.L.Li xiaoyu Li z.y.Li H.Liang H.Liang H.Liang y.F.Liang y.T.Liang G.R.Liao L.z.Liao J.Libby A.Limphirat C.x.Lin D.x.Lin T.Lin B.J.Liu C.x.Liu D.Liu F.H.Liu Fang Liu Feng Liu G.M.Liu H.Liu H.M.Liu Huanhuan Liu Huihui Liu J.B.Liu J.L.Liu J.y.Liu K.Liu K.y.L Institute of High Energy Physics Beijing 100049China Beihang University Beijing 100191China Beijing Institute of Petrochemical Technology Beijing 102617China Bochum Ruhr-University D-44780 BochumGermany Carnegie Mellon University PittsburghPennsylvania 15213USA Central China normal University Wuhan 430079China China Center of Advanced science and Technology Beijing 100190China COMsATs University Islamabad Lahore CampusDefence RoadOff Raiwind Road54000 LahorePakistan Fudan University Shanghai 200433China G.I.Budker Institute of nuclear Physics sB RAs(BInP) Novosibirsk 630090Russia GsI Helmholtzcentre for Heavy Ion Research GmbH D-64291 DarmstadtGermany Guangxi normal University Guilin 541004China Hangzhou normal University Hangzhou 310036China Helmholtz Institute mainz Staudinger Weg 18D-55099 MainzGermany Henan normal University Xinxiang 453007China Henan University of science and Technology Luoyang 471003China Henan University of Technology Zhengzhou 450001China Huangshan College Huangshan 245000China Hunan normal University Changsha 410081China Hunan University Changsha 410082China Indian Institute of Technology.madras Chennai 600036India Indiana University BloomingtonIndiana 47405USA InFn Laboratori nazionali di Frascati INFN Laboratori Nazionali di FrascatiI-00044FrascatiItaly InFn Laboratori nazionali di Frascati INFN Sezione di PerugiaI-06100PerugiaItaly InFn Laboratori nazionali di Frascati University of PerugiaI-06100PerugiaItaly InFn sezione di Ferrara INFN Sezione di FerraraI-44122FerraraItaly InFn sezione di Ferrara University of FerraraI-44122FerraraItaly Institute of Modern Physics Lanzhou 730000China Institute of Physics and Technology Peace Ave.54BUlaanbaatar 13330Mongolia Jilin University Changchun 130012China Johannes Gutenberg University of mainz Johann-Joachim-Becher-Weg 45D-55099 MainzGermany Joint Institute for nuclear Research 141980 DubnaMoscow regionRussia Justus-Liebig-Universitaet Giessen II.Physikalisches InstitutHeinrich-Buff-Ring 16

From December 2019 to June 2021,the BEsⅢ experiment collected approximately 5.85 fb^(−1) of data at center-of-mass energies between 4.61 and 4.95 *** is the highest collision energy BEPCⅡ has reached to *** accumulated e^(+)e^(−) annihilation data samples are useful for studying charmonium(-like)states and charmed-hadron *** adopting a novel method of analyzing the production of A_(c)^(+)A_(c)^(-) pairs in e^(+)e^(−) annihilation,the center-of-mass energies are measured with a precision of 0.6 *** luminosities are measured with a precision of better than 1% by analyzing the events of large-angle Bhabha *** measurements provide important inputs to analyses based on these data samples.

关键词： luminosity center-of-mass energy BEsⅢdetector

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number of J/ψ events at BEsIII

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Chinese Physics C 2022年第7期46卷 74-84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 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 J.J.Cui x.F.Cu 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.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 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 Husken 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.Kuhn 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.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 H.Liang H.Liang y.F.Liang y.T.Liang G.R.Liao L.z.Liao J.Libby A.Limphirat C.x.Lin D.x.Lin T.Lin B.J.Liu C.x.Liu D.Liu F.H.Liu Fang Liu Feng Liu G.M.Liu H.M.Liu Huanhuan Liu Huihui Liu J.B.Liu J.L.Liu J.y.Liu K.Liu K.y.Liu Ke Liu L.Liu M.H.Liu P.L.Liu Q.Liu Q.Liu s.B.Liu T.Liu T.Liu W.M.Liu x.Liu y.Liu y.B.Liu z.A.Liu z.Q.Liu x.C.Lou F.x.lu H.J.lu J.D. Institute of High Energy Physics Beijing 100049China Beihang University Beijing 100191China Beijing Institute of Petrochemical Technology Beijing 102617China Bochum Ruhr-University D-44780 BochumGermany Camnegie Mellon University PittsburghPennsylvania 15213USA Central China normal University Wuhan 430079China China Center of Advanced science and Technology Beijing 100190China COMsATs University Islamabad Lahore CampusDefence RoadOff Raiwind Road54000 LahorePakistan Fudan University Shanghai 200443China G.I.Budker Institute of nuclear Physies sBRAs(BInP) Novosibirsk 630090Russia GsI Helmholtzcentre for Heavy Ion Research GmbH D-64291 DarmstadtGermany Guangxi normal University Guilin 541004China Hangzhou normal University Hangzhou 310036China Helmholtz Institute mainz Staudinger Weg 18D-55099 MainzGermany Henan normal University Xinxiang 453007China Henan University of science and Technology Luoyang 471003China Henan University of Technology Zhengzhou 450001China Huangshan College Huangshan 245000China Hunan normal University Changsha 410081China Hunan University Changsha 410082China Indian Institute of Technology.madras Chennai 600036India Indiana University BloomingtonIndiana 47405USA InFn Laboratori nazionali di Frascati I-00044FrascatiItaly InFn sezione di Perugia I-06100PerugiaItaly University of Perugia I-06100PerugiaItaly University of Ferrara I-44122FerraraItaly Institute of Modern Physics Lanzhou 730000China Institute of Physies and Technology Peace Ave 54BUlaanbaatar 13330Mongolia Jilin University Changchun 130012China Johannes Gutenberg University of mainz Johann-Joachim-Becher-Weg 45D-55099 MainzGermany Joint Institute for nuclear Research 141980 DubnaMoscow regionRussia Justus-Liebig-Universitaet Giessen Ⅱ.Physikaliches InstitutHeinricH-Buff-Ring 16D-35392 GiessenGermany Lanzhou University Lnzhou 730000China Liaoning normal University Dalian 116029China Liaoning University Shenyang 110036China nanjing normal University Nanjing 210023China nanjing Univ

Using inclusive decays of J/ψ aprecise determination of the number of J/ψ events collected with the BEsIII detector was *** the two data sets taken in 2009 and 2012,the numbers of J/ψ events were recalculated to be(224.0±1.3)×10^(6) and(1088.5±4.4)×10^(6),respectively;these numbers are in good agreement with the previous measurements. For the J/ψ sample taken in 2017-2019,the number of events was determined to be(8774.0±39.4)×10^(6).The total number of J/ψ events collected with the BEsIII detector was determined to be(10087±44)×10^(6),where the uncertainty is dominated by systematic effects,and the statistical uncertainty is negligible.

关键词： number of J/ψevents BEsIII detector inclusive J/ψdecays

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Observation of e^+e^-→D_s^+■^((*)0)K^- and study of the P-wave D_s mesons

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Chinese Physics C 2019年第3期43卷 5-16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 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 s.J.Chen y.B.Chen W.s.Cheng 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 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.n.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 s.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 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 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 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 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 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 Kai Liu Ke Liu Q.Liu s.B.Liu x.Liu y.B.Liu z.A.Liu zhiqing Liu y.F.Long x.C.Lou H.J.lu J.D.lu J.G.lu y.lu y.P.lu C.L.luo M.x.luo P.W.luo T.luo x.L.luo s.lusso x.R.Lyu F.C.ma H.L.ma L.L.ma M.M.ma Q.M.ma x.n.ma x.x.ma x.y.ma y.M.ma F.E.maas M.maggiora s.maldaner Q.A.malik A.mangoni y.J.mao z.P.mao s.marcello z.x.Meng J.G.Messchendorp G.Mezzadri J.Min T.J.Min R.E.Mitchell x.H.Mo y Institute of High Energy Physics Beijing 100049China Beihang University Beijing 100191China Beijing Institute of Petrochemical Technology Beijing 102617China Bochum Ruhr-University D-44780 BochumGermany Carnegie Mellon University PittsburghPennsylvania 15213USA Central China normal University Wuhan 430079China China Center of Advanced science and Technology Beijing 100190China COMsATs University Islamabad Lahore CampusDefence RoadOff Raiwind Road54000 LahorePakistan Fudan University Shanghai 200443China G.I.Budker Institute of nuclear Physics sB RAs(BInP) Novosibirsk 630090Russia GsI Helmholtzcentre for Heavy Ion Research GmbH D-64291 DarmstadtGermany Guangxi normal University Guilin 541004China Guangxi University Nanning 530004China Hangzhou normal University Hangzhou 310036China Helmholtz Institute mainz Johann-Joachim-Becher-Weg 45D-55099 MainzGermany Henan normal University Xinxiang 453007China Henan University of science and Technology Luoyang 471003China Huangshan College Huangshan 245000China Hunan normal University Changsha 410081China Hunan University Changsha 410082China Indian Institute of Technology.madras Chennai 600036India Indiana University BloomingtonIndiana 47405USA InFn Laboratori nazionali di Frascati I-00044FrascatiItaly InFn sezione di Ferrara I-44122FerraraItaly Institute of Physics and Technology Peace Ave.54BUlaanbaatar 13330Mongolia Johannes Gutenberg University of mainz Johann-Joachim-Becher-Weg 45D-55099 MainzGermany Joint Institute for nuclear Research 141980 DubnaMoscow regionRussia Justus-Liebig-Universitaet Giessen II.Physikalisches InstitutHeinrich-Buff-Ring 16D-35392 GiessenGermany KVI-CART University of GroningenNL-9747 AA GroningenThe Netherlands Lanzhou University Lanzhou 730000China Liaoning University Shenyang 110036China nanjing normal University Nanjing 210023China nanjing University Nanjing 210093China nankai University Tianjin 300071China Peking University Beijing 100871China shandong University Jinan 250100China shanghai

studies of e^+e~→D_s^+■^((*)0)K^-and the P-wave charmed-strange mesons are performed based on an e^+e^-collision data sample corresponding to an integrated luminosity of 567 pb^(-1) collected with the BEsIII detector at s^(1/2)=4.600 GeV. The processes of e^+e^-→D_s^+■^(*0)K^- and D_s^+■~0K^- are observed for the first time and are found to be dominated by the modes D_s^+D_(s1)(2536)^-and D_s^+D_(s2)~*(2573)^-, respectively. The Born cross sections are measured to be σ~B(e^+e^-→D_s^+■^(*0)K^-) =(10.1±2.3±0.8) pb and σ~B(e^+e^-→D_s^+■~0K^-) =(19.4±2.3± 1.6) pb, and the products of Born cross section and the decay branching fraction are measured to be σ~B(e^+e^-→D_s^+D_(s1)(2536)^-+c.c.)·B(D_(s1)(2536)^-→■^(*0)K^-)=(7.5±1.8±0.7) pb and σ~B(e^+e^-→D_s^+D_(s2)~*(2573)^-+ c.c.)·B(D_(s2)~*(2573)^-→■~0 K^-)=(19.7 ± 2.9 ±2.0) pb. For the D_(s1)(2536)^-and D_(s2)~*(2573)^-mesons, the masses and widths are measured to be M(D_(s1)(2536)^-)=(2537.7±0.5 ±3.1) MeV/c2, Γ(D_(s1)(2536)^-) =(1.7 ±1.2 ±0.6)MeV, and M(D_(s2)~*(2573)^-)=(2570.7±2.0 ±1.7) MeV/c^2, Γ(D_(s2)~*(2573)^-)=(17.2 ±3.6 ±1.1) MeV. The spin-parity of the D_(s2)~*(2573)^-meson is determined to be J^p= 2^+. In addition, the processes e^+e^-→D_s^+■^((*)0)K^-are searched for using the data samples taken at four(two) center-of-mass energies between 4.416(4.527) and 4.575 GeV, and upper limits at the 90% confidence level on the cross sections are determined.

关键词： cross section P-wave D_s mesons resonance parameters spin-parity BEsIII

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Measurement of the integrated luminosities of cross-section scan data samples around theψ(3770)mass region

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Chinese Physics C 2018年第6期42卷 1-8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 O. Cakir 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 x. K. Chu G. Cibinetto F. Cossio H. a. Dai, J. F. 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. nuan J. Fang s. s. Fang y. Fang R. Farinelli L. Fava s. Fegan F. Feldbauer G. Felici C. Q. Feng E. Fioravanti M. Fritsch C. D. Fu Q. Gao x. L. Gao y. Gao, y. G. Gao z. Gao B. Garillon I. Garzia A. Gilman K. Goetzen L. Gong W. x. Gong W. Gradl M. Greco L. M. Gu M. H. Gu y. T. Gu A. q. Guo L. B. Guo R. P. Guo y. F. Guo A. Guskov z. Haddadi s. Han x. Q. hao F. A. Harris z. L. He x. O. He F. H. Heinsius T. Held y. K. Heng T. Holtmann z. L. Hou H. M. Hu J. F. gu T. Hu y. Hu G. s. Huang J. s. Huang x. T. Huang x. z. Huang z. L. guang T. Hussain W. Ikegami Andersson M Irshad Q. Ji Q. P. Ji x. B. Ji x. L. Ji x. s. Jiang x. y. Jiang J. B. Jiao z. Jiao D. P. Jin s. Jin y. Jin T. Johansson A. Julin n. Kalantar-nayestanaki x. s. Kang M. Kavatsyuk B. C. Ke T. Khan A. Khoukaz P. Kiese R. Kliemt L. Koch O. B. Kolcu B. Kopf M. Kornicer M. Kuemmel M. Kuessner A. Kupsc M. Kurth W. Kiihn J. s. Lange M. Lara P. Larin L. Lavezzi s. Leiber H. Leithofi 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 s. Liu B. J. Liu C. x. Liu D. Liu D. y. Liu F. H. Liu Fang Liu Feng Liu H. B. Liu H. L Liu H. M. Liu Huanhuan Liu Huihui Liu J. B. Liu J. y. Liu K. Liu K. y. Liu Ke Liu L. D. Liu Q. Liu s B. Y. Zhang144 C. C. Zhang1D. H. Zhang1 H. H. Zhang45H. Y. Zhang144 J. Zhang151 J. L. Zhang65 J. Q. Zhang4 J. W. Zhang1 J. Y. Zhang1 J. Z. Zhang151 K. Zhang151 L. Zhang46 S. F. Zhang35 T. J. Zhang3975 X. Y. Zhang38 Y. Zhang4457 Y. H. Zhang144 Y. T. Zhang4557 Yang Zhang1 Yao Zhang1 Yu Zhang51 Z. H. Zhang6 Z. P. Zhan57Z. Y. Zhang64 G. Zhao1J. W. Zhao144 J. Y. Zhao151 J. Z. Zhao144 Lei Zhao4457 Ling Zhao1 M. G. Zhao35 Q. Zhao1 S. J. Zhao67 T. C. Zhao1 Y. B. Zhao144 Z. G. Zhao4457 A. Zhemehugov2869 B. Zheng58J. P. Zheng144 W. J. Zheng38 Y. H. Zheng51B. Zhong33 L. Zhou144 Q. Zhou151 X. Zhou64 X. K. Zhou4457 X. R. Zhou4457 X. Y. Zhou1 A. N. Zhu151 J. Zhu35 J. Zhu45 K. Zhu1 K. J. Zhu1 S. Zhu1 S. H. Zhu56 X. L. Zhu46 Y. C. Zhu4457 Y. S. Zhu151 Z. A. Zhu151 J. Zhuang144B. S. Zou1 J. H. Zou1 （ 1 Institute of High Energy Physics Beijing 100049 China Beihang University Beijing 100191 China Beijing Institute of Petrochemical Technology Beijing 102617 China Bochum Ruhr-University D-44780 Bochum Germany Carnegie Mellon University Pittsburgh Pennsylvania 15213 USA Central China normal University Wuhan 430079 China China Center of Advanced science and Technology Beijing 100190 China COMsATs Institute of Information Technology Lahore Defence Road Off Raiwind Road 54000 Lahore Pakistan G.I. Budker Institute of nuclear Physics sB RAs （BInP） Novosibirsk 630090 Russia GsI Helmholtzcentre for Heavy Ion Research GmbH D-64291 Darmstadt Germany Guangxi normal University Guilin 541004 China Guangxi University Nanning 530004 China Hangzhou normal University Hangzhou 310036 China Helmholtz Institute mainz JohannwJoachim-Becher-Weg 45 D-55099 Mainz Germany Henan normal University Xinxiang 453007 China Henan University of science and Technology Luoyang 471003 China Huangshan College Huangshan 245000 China Hunan normal University Changsha 410081 China Hunan University Changsha 410082 China Indian Institute of Tec

To investigate the nature of the Ψ（3770） resonance and to measure the cross section for e^＋e^-→DD, a cross-section scan data sample, distributed among 41 center-of-mass energy points from 3.73 to 3.89 GeV, was taken with the BEsIII detector operated at the BEPCII collider in the year 2010. By analyzing the large angle Bhabha scattering events, we measure the integrated luminosity of the data sample at each center-of-mass energy point. The total integrated luminosity of the data sample is 76.16±0.04±0.61 pb^-1, where the first uncertainty is statistical and the second systematic.

关键词： Bhabha scattering events integrated luminosity BEsⅢ

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search for hidden-charm tetraquark with strangeness in e^(+)e^(−)→K^(+)D_(s)^(∗−) D^(∗0 )+ c.c.

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Chinese Physics C 2023年第3期47卷 1-14页

作者：麦迪娜 M.n.Achasov P.Adlarson M.Albrecht R.Aliberti A.Amoroso 安美儒安琪白羽 O.Bakina R.Baldini Ferroli I.Balossino y.Ban V.Batozskaya D.Becker K.Begzsuren n.Berger M.Bertani D.Bettoni F.Bianchi E.Bianco J.Bloms A.Bortone I.Boyko R.A.Briere A.Brueggemann 蔡浩蔡啸 A.Calcaterra 曹国富曹宁 s.A.Cetin 常劲帆常万玲车国荣 G.Chelkov 陈琛陈超陈刚陈和生陈玛丽陈申见陈少敏 T.Chen 陈旭荣 x.T.Chen 陈元柏陈卓俊成伟帅 s.K.Choi 初晓 G.Cibinetto F.Cossio 崔佳佳代洪亮代建平 A.Dbeyssi R.E.de Boer D.Dedovich 邓子艳 A.Denig I.Denysenko M.Destefanis F.De Mori 丁勇丁逸董静董燎原董明义董翔杜书先段宗欢 P.Egorov 范玉兰方建房双世方文兴方易 R.Farinelli L.Fava F.Feldbauer G.Felici 封常青冯俊华 K Fischer M.Fritsch C.Fritzsch 傅成栋高涵高原宁高扬 s.Garbolino I.Garzia 葛潘婷葛振武耿聪 E.M.Gersabeck A Gilman K.Goetzen 龚丽龚文煊 W.Gradl M.Greco 谷立民顾旻皓顾运厅关春懿郭爱强郭立波郭如盼郭玉萍 A.Guskov 韩文颖郝喜庆 F.A.Harris 何凯凯何康林 F.H.Heinsius C.H.Heinz 衡月昆 C.Herold 侯国一侯颖锐侯治龙胡海明 J.F.Hu 胡涛胡誉黄光顺黄凯旋黄麟钦黄性涛黄燕萍黄震 T.Hussain n Hüsken W.Imoehl M.Irshad J.Jackson s.Jaeger s.Janchiv E.Jang J.H.Jeong 纪全姬清平季晓斌季筱璐吉钰瑶贾泽坤蒋沛成姜赛赛江晓山 y.Jiang 焦健斌焦铮金山金毅荆茂强 T.Johansson s.Kabana n.Kalantar-nayestanaki 康晓琳康晓珅 R.Kappert M.Kavatsyuk 柯百谦 I.K.Keshk A.Khoukaz R.Kiuchi R.Kliemt L.Koch O.B.Kolcu B.Kopf M.Kuemmel M.Kuessner A.Kupsc W.Kühn J.J.Lane J.s.Lange P.Larin A.Lavania L.Lavezzi 雷天天雷祚弘 H.Leithoff M.Lellmann T.Lenz 李聪李翠李春花李澄李德民李飞李刚李慧李贺李海波李惠静 H.n.Li J.Q.Li 李静舒李井文李科 L.J Li 李龙科李蕾李明浩李培荣李素娴栗帅迎李腾李卫东李卫国李旭红李晓玲李晓宇李彦谷李振轩李紫源梁畅梁浩梁昊梁勇飞梁羽铁廖广睿廖龙洲 J.Libby A.Limphirat 林创新林德旭 T.Lin 刘北江刘成刘春秀 D.Liu 刘福虎刘芳刘峰 G.M.Liu H.Liu 刘宏邦刘怀民刘欢欢刘汇慧刘建北刘佳俊刘晶译刘凯刘魁勇刘珂刘亮刘露刘美宏刘佩莲刘倩刘树彬刘桐刘维克刘卫民刘翔刘英刘玉斌刘振安刘智青娄辛丑卢飞翔吕海江吕军光陆小玲卢宇卢云鹏卢泽辉罗成林罗民兴罗涛罗小兰吕晓睿吕翌丰马凤才马海龙马连良马明明马秋梅马润秋马瑞廷马骁妍马尧 F.E.maas M.maggiora s.maldaner s.malde Q.A.malik A.mangoni 冒亚军毛泽普 s.marcello 孟召霞 J.G.Messchendorp G.Mezzadri H.Miao 闵天觉 R.E.Mitchell 莫晓虎 n.yu.Muchnoi y.nefedov F.nerling I.B.nikolaev 宁哲 s.nisar 牛艳 s.L.Olsen 欧阳群 s.Pacetti 潘祥潘越 A.Pathak 裴宇鹏 M.Pelizaeus 彭海平 K.Peters 平加伦平荣刚 s.Plura s.Pogodin V.Prasad 齐法制齐航漆红荣祁鸣齐天钰钱森钱文斌钱圳乔从丰秦佳佳秦丽清覃潇平秦小帅秦中华邱进发屈三强 K Institute of High Energy Physics Beijing 100049China Beihang University Beijing 100191China Beijing Institute of PetrochemicalTechnology Beijing 102617China Bochum Ruhr-University D-44780 BochumGermany Carnegie Mellon University PittsburghPennsylvania15213USA Central China normal University Wuhan 430079China Central south University Changsha 410083China China Center of Advancedscience and Technology Beijing 100190China China University of Geosciences Wuhan 430074China COMsATs University Islamabad LahoreCampusDefence RoadOff Raiwind Road54000 LahorePakistan Fudan University Shanghai 200433China G.I.Budker Institute of nuclearPhysics sB RAs(BInP) Novosibirsk 630090Russia GsI Helmholtzcentre for Heavy Ion Research GmbH D-64291 DarmstadtGermany Guangxinormal University Guilin 541004China Guangxi University Nanning 530004China Hangzhou normal University Hangzhou 310036China Hebei University Baoding 071002China Helmholtz Institute mainz Staudinger Weg 18D-55099 MainzGermany Henan normaluniversity Xinxiang 453007China Henan University of science and Technology Luoyang 471003China Henan University of Technology Zhengzhou 450001China Huangshan College Huangshan 245000China Hunan normal University Changsha 410081China Hunan University Changsha 410082China Indian Institute of Technology.madras Chennai 600036India Indiana University BloomingtonIndiana 47405USA InFn Laboratori nazionali di Frascati INFN Laboratori Nazionali di FrascatiI-00044FrascatiItaly InFn Laboratori nazionali di Frascati INFN Sezione di PerugiaI-06100PerugiaItaly InFn Laboratori nazionali di Frascati University of PerugiaI-06100PerugiaItaly InFn sezione di Ferrara INFN Sezione di FerraraI-44122FerraraItaly InFn sezione di Ferrara University of FerraraI-44122FerraraItaly Institute of Modern Physics Lanzhou 730000People's Republic of China Institute of Physics and Technology Peace Avenue 54BUlaanbaatar 13330Mongolia Instituto de Alta Investigación Universidad de TarapacáCasilla 7DAricaChile Jilin Univers

We report a search for a heavier partner of the recently observed z_(cs)(3985)^(-) state,denoted as z_(cs)^('-),in the process e^(+)e^(−)→K^(+)D_(s)^(∗−) D^(∗0 )+ c.c.,based on e^(*)e^(-)collision data collected at the center-of-mass energies of √s=4.661,4.682 and 4.699 GeV with the BEsIII *** z_(cs)^('-) is of interest as it is expected to be a candidate for a hidden-charm and open-strange tetraquark.A partial-reconstruction technique is used to isolate K^(+)recoil-mass spectra,which are probed for a potential contribution from z_(cs)^('-)→D_(s)^(∗−) D^(∗0 )+ *** find an excess of z_(cs)^('-)→D_(s)^(*-)-D^(*0)(c.c.)candidates with a significance of 2.1o,after considering systematic uncertainties,at a mass of(4123.5±0.7_(sat)±4.7_(syst.))MeV/c^(2).As the data set is limited in size,the upper limits are evaluated at the 90%confidence level on the product of the Born cross sections(σ^(Borm))and the branching fraction(B)of z_(cs)^('-)→D_(s)^(*-)-D^(*0),under different assumptions of the z_(cs)^('-) mass from 4.120 to 4.140 MeV and of the width from 10 to 50 MeV at the three center-of-mass *** upper limits of σ^(Born).B are found to be at the level of O(1)pb at each *** data samples are needed to confirm the z_(cs)^('-) state and clarify its nature in the coming years.

关键词： electron-positron collision BEsIl hadron spectroscopy tetraquark

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Observations of the Cabibbo-suppressed decays Λ_(c)^(+)→nπ+π^(0),nπ^(+)π^(-)π^(+) and the Cabibbo-Favored decay Λ_(c)^(+)→nK^(-)π^(+)π^(+)

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Chinese Physics C 2023年第2期47卷 1-18页

作者：麦迪娜 M.n.Achasov P.Adlarson M.Albrecht R.Aliberti A.Amoroso 安美儒安琪白羽 O.Bakina R.Baldini Ferroli I.Balossino 班勇 V.Batozskaya D.Becker K.Begzsuren n.Berger M.Bertani D.Bettoni F.Bianchi E.Bianco J.Bloms A.Bortone I.Boyko R.A.Briere A.Brueggemann 蔡浩蔡啸 A.Calcaterra 曹国富曹宁 s.A.Cetin 常劲帆常万玲车国荣 G.Chelkov 陈琛陈超陈刚陈和生陈玛丽陈申见陈少敏 T.Chen 陈旭荣 x.T.Chen 陈元柏陈卓俊成伟帅 s.K.Choi 初晓 G.Cibinetto F.Cossio 崔佳佳代洪亮代建平 A.Dbeyssi R.Ede Boer D.Dedovich 邓子艳 A.Denig I.Denysenko M.Destefanis F.De Mori 丁勇丁逸董静董燎原董明义董翔杜书先段宗欢 P.Egorov 范玉兰方建房双世方文兴方易 R.Farinelli L.Fava F.Feldbauer G.Felici 封常青冯俊华 K Fischer M.Fritsch C.Fritzsch 傅成栋高涵高原宁高扬 s.Garbolino I.Garzia 葛潘婷葛振武耿聪 E.M.Gersabeck A Gilman K.Goetzen 龚丽龚文煊 W.Gradl M.Greco 谷立民顾旻皓顾运厅关春懿郭爱强郭立波郭如盼郭玉萍 A.Guskov 韩文颖郝喜庆 F.A.Harris 何凯凯何康林 F.H.Heinsius C.H.Heinz 衡月昆 C.Herold 侯国一侯颖锐侯治龙胡海明 J.F.Hu 胡涛胡誉黄光顺黄凯旋黄麟钦黄性涛黄燕萍黄震 T.Hussain n Hüsken W.Imoehl M.Irshad J.Jackson s.Jaeger s.Janchiv E.Jang J.H.Jeong 纪全姬清平季晓斌季筱璐吉钰瑶贾泽坤姜赛赛江晓山 y.Jiang 焦健斌焦铮金山金毅荆茂强 T.Johansson n.Kalantar-nayestanaki 康晓珅 R.Kappert M.Kavatsyuk 柯百谦 I.K.Keshk A.Khoukaz R.Kiuchi R.Kliemt L.Koch O.B.Kolcu B.Kopf M.Kuemmel M.Kuessner A.Kupsc W.Kühn J.J.Lane J.s.Lange P.Larin A.Lavania L.Lavezzi 雷祚弘 H.Leithoff M.Lellmann T.Lenz 李翠李聪李春花李澄李德民李飞李刚李慧李贺李海波李惠静 H.n.Li J.Q.Li 李静舒李井文李科 L.J Li 李龙科李蕾李明浩李培荣李素娴栗帅迎李腾李卫东李卫国李旭红李晓玲李晓宇李彦谷李振轩李紫源梁畅梁昊梁浩梁浩梁勇飞梁羽铁廖广睿廖龙洲 J.Libby A.Limphirat 林创新林德旭 T.Lin 刘北江刘成刘春秀 D.Liu 刘福虎刘芳刘峰 G.M.Liu H.Liu 刘宏邦刘怀民刘欢欢刘汇慧刘建北刘佳俊刘晶译刘凯刘魁勇刘珂刘亮刘露刘美宏刘佩莲刘倩刘树彬刘桐刘维克刘卫民刘翔刘英刘玉斌刘振安刘智青娄辛丑卢飞翔吕海江吕军光陆小玲卢宇卢云鹏 z.H.lu 罗成林罗民兴罗涛罗小兰吕晓睿吕翌丰马凤才马海龙马连良马明明马秋梅马润秋马瑞廷马骁妍马尧 F.E.maas M.maggiora s.maldaner s.malde Q.A.malik A.mangoni 冒亚军毛泽普 s.marcello 孟召霞 J.G.Messchendorp G.Mezzadri H.Miao 闵天觉 R.E.Mitchell 莫晓虎 n.yu.Muchnoi y.nefedov F.nerling I.B.nikolaev 宁哲 s.nisar 牛艳 s.L.Olsen 欧阳群 s.Pacetti 潘祥潘越 A.Pathak P.Patteri M.Pelizaeus 彭海平 K.Peters 平加伦平荣刚 s.Plura s.Pogodin V.Prasad 齐法制齐航漆红荣祁鸣齐天钰钱森钱文斌钱圳乔从丰秦佳佳秦丽清覃潇平秦小帅秦中华邱进发屈三强 K.H.Rashid C.F Institute of High Energy Physics Beijing 100049China Beihang University Beijing 100191China Beijing Institute of Petrochemical Technology Beijing 102617China Bochum Ruhr-University D-44780 BochumGermany Carnegie Mellon University PittsburghPennsylvania 15213USA Central China normal University Wuhan 430079China Central south University Changsha 410083China China Center of Advanced science and Technology Beijing 100190China COMsATs University Islamabad Lahore CampusDefence RoadOff Raiwind Road54000 LahorePakistan Fudan University Shanghai 200433China G.I.Budker Institute of nuclear Physics sB RAs(BInP) Novosibirsk 630090Russia GsI Helmholtzcentre for Heavy Ion Research GmbH D-64291 DarmstadtGermany Guangxi normal University Guilin 541004China Guangxi University Nanning 530004China Hangzhou normal University Hangzhou 310036China Hebei University Baoding 071002China Helmholtz Institute mainz Staudinger Weg 18D-55099 MainzGermany Henan normal University Xinxiang 453007China Henan University of science and Technology Luoyang 471003China Henan University of Technology Zhengzhou 450001China Huangshan College Huangshan 245000China Hunan normal University Changsha 410081China Hunan University Changsha 410082China Indian Institute of Technology.madras Chennai 600036India Indiana University BloomingtonIndiana 47405USA InFn Laboratori nazionali di Frascati I-00044FrascatiItaly InFn sezione di Perugia I-06100PerugiaItaly University of Perugia I-06100PerugiaItaly InFn sezione di Ferrara I-44122FerraraItaly University of Ferrara I-44122FerraraItaly Institute of Modern Physics Lanzhou 730000China Institute of Physics and Technology Peace Avenue 54BUlaanbaatar 13330Mongolia Jilin University Changchun 130012China Johannes Gutenberg University of mainz Johann-Joachim-Becher-Weg 45D-55099 MainzGermany Joint Institute for nuclear Research 141980 DubnaMoscow regionRussia Justus-Liebig-Universitaet Giessen II.Physikalisches InstitutHeinrich-Buff-Ring 16D-35392 GiessenGermany Lanzhou Un

Using electron-positron annihilation data samples corresponding to an integrated luminosity of 4.5 fb-1,collected by the BEsⅢdetector in the energy region between 4599.53 MeV and 4698.82 MeV,we report the first observations of the Cabibbo-suppressed decaysΛ_(c)^(+)→nπ^(+)π^(0),Λ_(c)^(+)→nπ^(+)π^(-)π^(+),and the Cabibbo-favored decayΛ_(c)^(+)→nK^(-)π^(+)π^(+)with statistical significances of 7.9σ,7.8σ,and>10σ,*** branching fractions of these decays are measured to be B(Λ_(c)^(+)→nπ^(+)π^(0))=(0.64±0.09±0.02)%,B(Λ_(c)^(+)→nπ^(+)π^(-)π^(+))=(0.45±0.07±0.03)%,and B(Λ_(c)^(+)→nK^(-)π^(+)π^(+))=(1.90±0.08±0.09)%,where the first uncertainties are statistical and the second are *** find that the branching fraction of the decayΛ_(c)^(+)→nπ^(+)π^(0)is about one order of magnitude higher than that ofΛ_(c)^(+)→nπ^(+).

关键词： ∧_(c)^(+)baryon Branching fraction BEsⅢdetector

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Observation of e^(+)e^(-)→pppñπ-+c.c.

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Chinese Physics C 2023年第4期47卷 16-25页

作者：麦迪娜 M.n.Achasov P.Adlarson M.Albrecht R.Aliberti A.Amoroso 安美儒安琪白旭红白羽 O.Bakina R.Baldini Ferroli I.Balossino 班勇 V.Batozskaya D.Becker K.Begzsuren n.Berger M.Bertani D.Bettoni F.Bianchi J.Bloms A.Bortone I.Boyko R.A.Briere A.Brueggemann 蔡浩蔡啸 A.Calcaterra 曹国富曹宁 s.A.Cetin 常劲帆常万玲 G.Chelkov 陈琛陈超陈刚陈和生陈玛丽陈申见陈少敏 T.Chen 陈旭荣 x.T.Chen 陈元柏陈卓俊成伟帅初晓 G.Cibinetto F.Cossio 崔佳佳代洪亮代建平 A.Dbeyssi R.E.de Boer D.Dedovich 邓子艳 A.Denig I.Denysenko M.Destefanis F.De Mori 丁勇董静董燎原董明义董翔杜书先 P.Egorov 范玉兰方建房双世方文兴方易 R.Farinelli L.Fava F.Feldbauer G.Felici 封常青冯俊华 K Fischer M.Fritsch C.Fritzsch 傅成栋高涵高原宁高扬 s.Garbolino I.Garzia 葛潘婷葛振武耿聪 E.M.Gersabeck A Gilman K.Goetzen 龚丽龚文煊 W.Gradl M.Greco 谷立民顾旻皓顾运厅关春懿郭爱强郭立波郭如盼郭玉萍 A.Guskov 韩婷婷韩文颖郝喜庆 F.A.Harris 何凯凯何康林 F.H.Heinsius C.H.Heinz 衡月昆 C.Herold M.Himmelreich 侯国一侯颖锐侯治龙胡海明 J.F.Hu 胡涛胡誉黄光顺黄凯旋黄麟钦黄麟钦黄性涛黄燕萍黄震 T.Hussain n Hüsken W.Imoehl M.Irshad J.Jackson s.Jaeger s.Janchiv 纪全姬清平季晓斌季筱璐吉钰瑶贾泽坤姜侯兵姜赛赛江晓山 y.Jiang 焦健斌焦铮金山金毅荆茂强 T.Johansson n.Kalantar-nayestanaki 康晓珅 R.Kappert 柯百谦 I.K.Keshk A.Khoukaz P.Kiese R.Kiuchi R.Kliemt L.Koch O.B.Kolcu B.Kopf M.Kuemmel M.Kuessner A.Kupsc W.Kühn J.J.Lane J.s.Lange P.Larin A.Lavania L.Lavezzi 雷祚弘 H.Leithoff M.Lellmann T.Lenz 李翠李聪李春花李澄李德民李飞李刚李慧李贺李海波李惠静 H.n.Li J.Q.Li 李静舒李井文李科 L.J.Li 李龙科李蕾李明浩李培荣李素娴栗帅迎李腾李卫东李卫国李旭红李晓玲李晓宇梁昊梁浩梁浩梁勇飞梁羽铁廖广睿廖龙洲 J.Libby A.Limphirat 林创新林德旭 T.Lin 刘北江刘春秀 D.Liu 刘福虎刘芳刘峰 G.M.Liu H.Liu, 刘宏邦刘怀民刘欢欢刘汇慧刘建北刘佳俊刘晶译刘凯刘魁勇刘珂刘亮刘露刘美宏刘佩莲刘倩刘树彬刘桐刘维克刘卫民刘翔刘英刘玉斌刘振安刘智青娄辛丑卢飞翔吕海江吕军光陆小玲卢宇卢云鹏 z.H.lu 罗成林罗民兴罗涛罗小兰吕晓睿吕翌丰马凤才马海龙马连良马明明马秋梅马润秋马瑞廷马骁妍马尧 F.E.maas M.maggiora s.maldaner s.malde Q.A.malik A.mangoni 冒亚军毛泽普 s.marcello 孟召霞 J.G.Messchendorp G.Mezzadri H.Miao 闵天觉 R.E.Mitchell 莫晓虎 n.yu.Muchnoi y.nefedov F.nerling I.B.nikolaev 宁哲 s.nisar 牛艳 s.L.Olsen 欧阳群 s.Pacetti 潘祥潘越 A.Pathak M.Pelizaeus 彭海平 K.Peters 平加伦平荣刚 s.Plura s.Pogodin V.Prasad 齐法制齐航漆红荣祁鸣齐天钰钱森钱文斌钱圳乔从丰秦佳佳秦丽清覃潇平秦小帅秦中华邱进发屈三强 K.H.Rashid C.F.Redmer 任旷洁 A.Rivetti V.Rodin M.Rolo 荣刚 Ch.Ros Institute of High Energy Physics Beijing 100049China Beihang University Beijing 100191China Beijing Institute of Petrochemical Technology Beijing 102617China Bochum Ruhr-University D-44780 BochumGermany Carnegie Mellon University PittsburghPennsylvania 15213USA Central China normal University Wuhan 430079China Central south University Changsha 410083China China Center of Advanced science and Technology Beijing 100190China COMsATs University Islamabad Lahore CampusDefence RoadOff Raiwind Road54000 LahorePakistan Fudan University Shanghai 200433China G.I.Budker Institute of nuclear Physics sB RAs(BInP) Novosibirsk 630090Russia GsI Helmholtzcentre for Heavy Ion Research GmbH D-64291 DarmstadtGermany Guangxi normal University Guilin 541004China Guangxi University Nanning 530004China Hangzhou normal University Hangzhou 310036China Hebei University Baoding 071002China Helmholtz Institute mainz Staudinger Weg 18D-55099 MainzGermany Henan normal University Xinxiang 453007China Henan University of science and Technology Luoyang 471003China Henan University of Technology Zhengzhou 450001China Huangshan College Huangshan 245000China Hunan normal University Changsha 410081China Hunan University Changsha 410082China Indian Institute of Technology.madras Chennai 600036India Indiana University BloomingtonIndiana 47405USA InFn Laboratori nazionali di Frascati I-00044FrascatiItaly InFn sezione di Perugia I-06100PerugiaItaly University of Perugia I-06100PerugiaItaly InFn sezione di Ferrara I-44122FerraraItaly University of Ferrara I-44122FerraraItaly Institute of Modern Physics Lanzhou 730000China B Ulaanbaatar 13330Mongolia Jilin University Changchun 130012China Johannes Gutenberg University of mainz Johann-Joachim-Becher-Weg 45D-55099 MainzGermany Joint Institute for nuclear Research 141980 DubnaMoscow regionRussia Justus-Liebig-Universitaet Giessen II.Physikalisches InstitutHeinrich-Buff-Ring 16D-35392 GiessenGermany Lanzhou University Lanzhou 730000China Liaoning normal Unive

Using data taken at 29 center-of-mass energies between 4.16 and 4.70 GeV with the BEsⅢdetector at the Beijing Electron Positron Collider corresponding to a total integrated luminosity of approximately 18.8 fb^(-1),the process e^(+)e^(-)→pppñπ+*** observed for the first time with a statistical significance of 11.5σ.The average Born cross sections in the energy ranges of(4.160,4.380)GeV,(4.400,4.600)GeV and(4.610,4.700)GeV are measured to be(21.5±5.7±1.2)fb,(46.3±10.6±2.5)fb and(59.0±9.4±3.2)fb,respectively,where the first uncertainties are statistical and the second are *** line shapes of the pñ and ppπ^(-)invariant mass spectra are consistent with phase space distributions,indicating that no hexaquark or di-baryon state is observed.

关键词： Multi-baryon channel hexaquark di-baryon states cross section measurement

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search for the weak decayψ(3686)→■+c.c.

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Chinese Physics C 2023年第1期47卷 19-27页

作者：麦迪娜 M.n.Achasov P.Adlarson M.Albrecht R.Aliberti A.Amoroso 安美儒安琪白旭红白羽 O.Bakina R.Baldini Ferroli I.Balossino 班勇 V.Batozskaya D.Becker K.Begzsuren n.Berger M.Bertani D.Bettoni F.Bianchi J.Bloms A.Bortone I.Boyko R.A.Briere A.Brueggemann 蔡浩蔡啸 A.Calcaterra 曹国富曹宁 s.A.Cetin 常劲帆常万玲 G.Chelkov 陈琛陈超陈刚陈和生陈玛丽陈申见陈少敏 T.Chen 陈旭荣 x.T.Chen 陈元柏陈卓俊成伟帅初晓 G.Cibinetto F.Cossio 崔佳佳代洪亮代建平 A.Dbeyssi R.E.de Boer D.Dedovich 邓子艳 A.Denig I.Denysenko M.Destefanis F.De Mori 丁勇董静董燎原董明义董翔杜书先 P.Egorov 范玉兰方建房双世方文兴方易 R.Farinelli L.Fava F.Feldbauer G.Felici 封常青冯俊华 K Fischer M.Fritsch C.Fritzsch 傅成栋高涵高原宁高扬 s.Garbolino I.Garzia 葛潘婷葛振武耿聪 E.M.Gersabeck A Gilman K.Goetzen 龚丽龚文煊 W.Gradl M.Greco 谷立民顾旻皓顾运厅关春懿郭爱强郭立波郭如盼郭玉萍 A.Guskov 韩婷婷韩文颖郝喜庆 F.A.Harris 何凯凯何康林 F.H.Heinsius C.H.Heinz 衡月昆 C.Herold M.Himmelreich 侯国一侯颖锐侯治龙胡海明 J.F.Hu 胡涛胡誉黄光顺黄凯旋黄麟钦黄麟钦黄性涛黄燕萍黄震 T.Hussain n Hüsken W.Imoehl M.Irshad J.Jackson s.Jaeger s.Janchiv 纪全姬清平季晓斌季筱璐吉钰瑶贾泽坤姜侯兵姜赛赛江晓山 y.Jiang 焦健斌焦铮金山金毅荆茂强 T.Johansson n.Kalantar-nayestanaki 康晓珅 R.Kappert 柯百谦 I.K.Keshk A.Khoukaz P.Kiese R.Kiuchi R.Kliemt L.Koch O.B.Kolcu B.Kopf M.Kuemmel M.Kuessner A.Kupsc W.Kühn J.J.Lane J.s.Lange P.Larin A.Lavania L.Lavezzi 雷祚弘 H.Leithoff M.Lellmann T.Lenz 李翠李聪李春花李澄李德民李飞李刚李慧李贺李海波李惠静 H.n.Li J.Q.Li 李静舒李井文李科 L.J.Li 李龙科李蕾李明浩李培荣李素娴栗帅迎李腾李卫东李卫国李旭红李晓玲李晓宇梁昊梁浩梁浩梁勇飞梁羽铁廖广睿廖龙洲 J.Libby A.Limphirat 林创新林德旭 T.Lin 刘北江刘春秀 D.Liu 刘福虎刘芳刘峰 G.M.Liu H.Liu 刘宏邦刘怀民刘欢欢刘汇慧刘建北刘佳俊刘晶译刘凯刘魁勇刘珂刘亮刘露刘美宏刘佩莲刘倩刘树彬刘桐刘维克刘卫民刘翔刘英刘玉斌刘振安刘智青娄辛丑卢飞翔吕海江吕军光陆小玲卢宇卢云鹏 z.H.lu 罗成林罗民兴罗涛罗小兰吕晓睿吕翌丰马凤才马海龙马连良马明明马秋梅马润秋马瑞廷马骁妍马尧 F.E.maas M.maggiora s.maldaner s.malde Q.A.malik A.mangoni 冒亚军毛泽普 s.marcello 孟召霞 J.G.Messchendorp G.Mezzadri H.Miao 闵天觉 R.E.Mitchell 莫晓虎 n.yu.Muchnoi y.nefedov F.nerling I.B.nikolaev 宁哲 s.nisar 牛艳 s.L.Olsen 欧阳群 s.Pacetti 潘祥潘越 A.Pathak M.Pelizaeus 彭海平 K.Peters 平加伦平荣刚 s.Plura s.Pogodin V.Prasad 齐法制齐航漆红荣祁鸣齐天钰钱森钱文斌钱圳乔从丰秦佳佳秦丽清覃潇平秦小帅秦中华邱进发屈三强 K.H.Rashid C.F.Redmer 任旷洁 A.Rivetti V.Rodin M.Rolo 荣刚 Ch.Rosn Institute of High Energy Physics Beijing 100049China Beihang University Beijing 100191China Beijing Institute of Petrochemical Technology Beijing 102617China Bochum Ruhr-University D-44780 BochumGermany Carnegie Mellon University PittsburghPennsylvania 15213USA Central China normal University Wuhan 430079China Central south University Changsha 410083China China Center of Advanced science and Technology Beijing 100190China COMsATs University Islamabad Lahore CampusDefence RoadOff Raiwind Road54000 LahorePakistan Fudan University Shanghai 200433China G.I.Budker Institute of nuclear Physics sB RAs(BInP) Novosibirsk 630090Russia GsI Helmholtzcentre for Heavy Ion Research GmbH D-64291 DarmstadtGermany Guangxi normal University Guilin 541004China Guangxi University Nanning 530004China Hangzhou normal University Hangzhou 310036China Hebei University Baoding 071002China Helmholtz Institute mainz Staudinger Weg 18D-55099 MainzGermany Henan normal University Xinxiang 453007China Henan University of science and Technology Luoyang 471003China Henan University of Technology Zhengzhou 450001China Huangshan College Huangshan 245000China Hunan normal University Changsha 410081China Hunan University Changsha 410082China Indian Institute of Technology.madras Chennai 600036India Indiana University BloomingtonIndiana 47405USA AInFn Laboratori nazionali di Frascati I-00044FrascatiItaly InFn sezione di Perugia I-06100PerugiaItaly University of Perugia I-06100PerugiaItaly InFn sezione di Ferrara I-44122FerraraItaly University of Ferrara I-44122FerraraItaly Institute of Modern Physics Lanzhou 730000China Institute of Physics and Technology Peace Avenue 54BUlaanbaatar 13330Mongolia Jilin University Changchun 130012China Johannes Gutenberg University of mainz Johann-Joachim-Becher-Weg 45D-55099 MainzGermany Joint Institute for nuclear Research 141980 DubnaMoscow regionRussia Justus-Liebig-Universitaet Giessen II.Physikalisches InstitutHeinrich-Buff-Ring 16D-35392 GiessenGermany Lanzhou U

Using(448.1±2.9)×10^(6)ψ(3686)for the weak baryonic decayψ(3686)→Λc+∑-+c.c..The analysis procedure is optimized using a blinded *** significant signal is observed,and the upper limit on the branching fraction(B... 详细信息

关键词： weak decay upper limit BEsIII detector

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Measurement of integrated luminosity of data collected at 3.773 GeV by BEsIII from 2021 to 2024

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Chinese Physics C 2024年第12期48卷 1-10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 G.R.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.y.Chen s.K.Choi 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.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 y.H.Fan J.Fang 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 M.Fritsch C.D.Fu J.L.Fu y.W.Fu H.Gao x.B.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 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 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 s.L.Hu T.Hu y.Hu G.s.Huang K.x.Huang L.Q.Huang x.T.Huang y.P.Huang y.s.Huang T.Hussain F.Hölzken n.Hüsken n.in der Wiesche 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.Kupsc W.Kühn J.J.Lane L.Lavezzi T.T.Lei z.H.Lei M.Lellmann T.Lenz C.Li C.Li C.H.Li Cheng Li D.M.Li F.Li G.Li H.B.Li H.J.Li H.n.Li Hui Li J.R.Li J.s.Li K.Li L.J.Li L.K.Li Lei Li M.H.Li P.R.Li Q.M.Li Q.x.Li R.Li s.x.Li T.Li W.D.Li W.G.Li x.Li x.H.Li x.L.Li x.y.Li x.z.Li y.G Institute of High Energy Physics Beijing 18049China Beihang University Beijing 18191China Bochum Ruhr-University D-44780 BochumGermany Budker Institute of nuclear Physics sB RAs(BInP) Novosibirsk 630090Russia Carnegie Mellon University PittsburghPennsylvania 15213USA Central China normal University Wuhan 430079China Central south University Changsha 41883China China Center of Advanced science and Technology Beijing 18190China China University of Geosciences Wuhan 430074China Chung-Ang University Seoul06974Republic of Korea COMsATs University Islamabad Lahore CampusDefence RoadOff Raiwind Road54000 LahorePakistan Fudan University Shanghai 200433China GsI Helmholtzcentre for Heavy Ion Research GmbH D-64291 DarmstadtGermany Guangxi normal University Guilin 54184China Guangxi University Nanning 530004China Hangzhou normal University Hangzhou 31836China Hebei University Baoding 07182China Helmholtz Institute mainz Staudinger Weg 18D-55099 MainzGermany Henan normal University Xinxiang 453007China Henan University Kaifeng 475004China Henan University of science and Technology Luoyang 47183China Henan University of Technology Zhengzhou 450001China Huangshan College Huangshan 245000China Hunan normal University Changsha 41881China Hunan University Changsha 41882China Indian Institute of Technology.madras Chennai 600036India Indiana University BloomingtonIndiana 47405USA InFn Laboratori nazionali di Frascati INFN Laboratori Nazionali di FrascatiI-00044FrascatiItaly InFn Laboratori nazionali di Frascati INFN Sezione di PerugiaI-0618PerugiaItaly InFn Laboratori nazionali di Frascati University of PerugiaI-0618PerugiaItaly InFn sezione di Ferrara INFN Sezione di FerraraI-44122FerraraItaly InFn sezione di Ferrara University of FerraraI-44122FerraraItaly Inner Mongolia University Hohhot 01821China Institute of Modern Physics Lanzhou 730000China Institute of Physics and Technology Peace Avenue 54BUlaanbaatar 13330Mongolia Instituto de Alta Investigación Universidad de Tarapacá

We present a measurement of the integrated luminosity of e^(+)e^(-)collision data collected by the BEsIII detector at the BEPCII collider at a center-of-mass energy of Ecm=3.773 *** integrated luminosities of the datasets taken from December 2021 to June 2022,from november 2022 to June 2023,and from October 2023 to February 2024 were determined to be 4.995±0.019 fb^(-1),8.157±0.031 fb^(-1),and 4.191±0.016 fb^(-1),respectively,by analyzing large angle Bhabha scattering *** uncertainties are dominated by systematic effects,and the statistical uncertainties are *** results provide essential input for future analyses and precision measurements.

关键词： Bhabha scattering events integrated luminosity cross-section

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search for the rare decays W^(+)→D_(s)^(+)γ and z→D^(0)γ at LHCb

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Chinese Physics C 2023年第9期47卷 14-26页

作者： R.Aaij A.s.W.Abdelmotteleb C.Abellan Beteta F.Abudinén T.Ackernley B.Adeva M.Adinolfi P.Adlarson H.Afsharnia C.Agapopoulou C.A.Aidala z.Ajaltouni s.Akar K.Akiba J.Albrecht F.Alessio M.Alexander A.Alfonso Albero z.Aliouche P.Alvarez Cartelle R.Amalric s.Amato J.L.Amey y.Amhis L.An L.Anderlini M.Andersson A.Andreianov M.Andreotti D.Andreou D.Ao F.Archilli A.Artamonov M.Artuso E.Aslanides M.Atzeni B.Audurier s.Bachmann M.Bachmayer J.J.Back A.Bailly-reyre P.Baladron Rodriguez V.Balagura W.Baldini J.Baptista de souza Leite M.Barbetti R.J.Barlow s.Barsuk W.Barter M.Bartolini F.Baryshnikov J.M.Basels G.Bassi B.Batsukh A.Battig A.Bay A.Beck M.Becker F.Bedeschi I.B.Bediaga A.Beiter V.Belavin s.Belin V.Bellee K.Belous I.Belov I.Belyaev G.Benane G.Bencivenni E.Ben-Haim A.Berezhnoy *** *** Andres D.Berninghoff H.C.Bernstein C.Bertella A.Bertolin C.Betancourt F.Betti Ia.Bezshyiko s.Bhasin J.Bhom L.Bian M.s.Bieker n.V.Biesuz s.Bifani P.Billoir A.Biolchini M.Birch F.C.R.Bishop A.Bitadze A.Bizzeti M.P.Blago T.Blake F.Blanc J.E.Blank s.Blusk D.Bobulska J.A.Boelhauve O.Boente Garcia T.Boettcher A.Boldyrev C.s.Bolognani R.Bolzonella n.Bondar F.Borgato s.Borghi M.Borsato J.T.Borsuk s.A.Bouchiba T.J.V.Bowcock A.Boyer C.Bozzi M.J.Bradley s.Braun A.Brea Rodriguez J.Brodzicka A.Brossa Gonzalo J.Brown D.Brundu A.Buonaura L.Buonincontri A.T.Burke C.Burr A.Bursche A.Butkevich J.s.Butter J.Buytaert W.Byczynski s.Cadeddu H.Cai R.Calabrese L.Calefice s.Cali R.Calladine M.Calvi M.Calvo Gomez P.Campana D.H.Campora Perez A.F.Campoverde Quezada s.Capelli L.Capriotti A.Carbone G.Carboni R.Cardinale A.Cardini P.Carniti L.Carus A.Casais Vidal R.Caspary G.Casse M.Cattaneo G.Cavallero V.Cavallini s.Celani J.Cerasoli D.Cervenkov A.J.Chadwick M.G.Chapman M.Charles Ph.Charpentier C.A.Chavez Barajas M.Chefdeville C.Chen s.Chen A.Chernov s.Chernyshenko V.Chobanova s.Cholak M.Chrzaszcz A.Chubykin V.Chulikov P.Ciambrone M.F.Cicala x.Cid Vidal G.Ciezarek G.Ciullo P.E.L.Clarke M.Clemencic H.V.Cliff J.Closier J.L.Cobbledick V.Coco J.A.B.Coelho J.Cogan E.Cognera Centro Brasileiro de Pesquisas Físicas(CBPF) Rio de JaneiroBrazil Universidade Federal do Rio de Janeiro(UFRJ) Rio de JaneiroBrazil Center for High Energy Physics Tsinghua UniversityBeijingChina Institute Of High Energy Physics(IHEP) BeijingChina school of Physics state Key Laboratory of nuclear Physics and Technology Peking UniversityBeijingChina University of Chinese Academy of sciences BeijingChina Institute of Particle Physics Central China Normal UniversityWuhanHubeiChina Université savoie Mont Blanc CNRSIN2P3-LAPPAnnecyFrance UniversitéClermont Auvergne CNRS/IN2P3LPCClermont-FerrandFrance Aix marseille Univ CNRS/IN2P3CPPMMarseilleFrance UniversitéParis-saclay CNRS/IN2P3IJCLabOrsayFrance Laboratoire Leprince-Ringuet CNRS/IN2P3Ecole PolytechniqueInstitut Polytechnique de ParisPalaiseauFrance LPnHE Sorbonne UniversitéParis Diderot Sorbonne Paris CitéCNRS/IN2P3ParisFrance I.Physikalisches Institut RWTH Aachen UniversityAachenGermany Fakultat Physik Technische Universitat DortmundDortmundGermany max-Planck-Institut für Kernphysik(MPIK) HeidelbergGermany Physikalisches Institut Ruprecht-Karls-Universitat HeidelbergHeidelbergGermany school of Physics University College DublinDublinIreland InFn sezione di Bari BariItaly InFn sezione di Bologna BolognaItaly InFn sezione di Ferrara FerraraItaly InFn sezione di Firenze FirenzeItaly InFn Laboratori nazionali di Frascati FrascatiItaly InFn sezione di Genova GenovaItaly InFn sezione di Milano MilanoItaly InFn sezione di Milano-Bicocca MilanoItaly InFn sezione di Cagliari MonserratoItaly Universitàdegli studi di Padova Universitàe INFNPadovaPadovaItaly InFn sezione di Pisa PisaItaly InFn sezione di Roma La sapienza RomaItaly InFn sezione di Roma Tor Vergata RomaItaly nikhef national Institute for subatomic Physics AmsterdamNetherlands nikhef national Institute for subatomic Physics and VU University Amsterdam AmsterdamNetherlands AGH-University of science and Technology Faculty of Physics and Applied Computer Scienc

A search for the rare decays W^(+)→D_(s)^(+)γ and z→D0γis performed using proton-proton collision data collected by the LHCb experiment at a centre-of-mass energy of 13TeV,corresponding to an integrated luminosity of 2.0fb−*** significant signal is observed for either decay mode and upper limits on their branching fractions are set using W^(+)→D_(s)^(+)γ and z→μ+μ−decays as normalization *** upper limits are 6.5×10^(−4) and 2.1×10^(−3) at 95% confidence level for the W^(+)→D_(s)^(+)γ and z→D^(0)γ decay modes,*** is the first reported search for the z→D^(0)γ decay,while the upper limit on the W+→D+sγbranching fraction improves upon the previous best limit.

关键词： W/z boson rare decay upper limit of branching fraction

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