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Chinese Physics C 2020年第4期44卷 I0001-I0004,1-102页

作者： M.Ablikim M.N.Achasov P.Adlarson S.Ahmed M.Albrecht M.Alekseev A.Amoroso F.F.An Q.An Y.Bai O.Bakina R.Baldini Ferroli Y.Ban K.Begzsuren J.V.Bennett N.Berger M.Bertani D.Bettoni F.Bianchi J Biernat J.Bloms I.Boyko R.A.Briere L.Calibbi H.Cai X.Cai A.Calcaterra G.F.Cao N.Cao S.A.Cetin J.Chai J.F.Chang W.L.Chang J.Charles G.Chelkov Chen G.Chen H.S.Chen J.C.Chen M.L.Chen S.J.Chen Y.B.Chen H.Y.Cheng W.Cheng G.Cibinetto F.Cossio X.F.Cui H.L.Dai J.P.Dai X.C.Dai A.Dbeyssi D.dedovich Z.Y.deng A.denig denysenko M.destefanis S.descotes-Genon F.de Mori Y.Ding C.Dong J.Dong L.Y.Dong M.Y.Dong Z.L.Dou S.X.Du S.I.Eidelman J.Z.Fan J.Fang S.S.Fang Y.Fang R.Farinelli L.Fava F.Feldbauer G.Felici C.Q.Feng M.Fritsch C.D.Fu Y.Fu Q.Gao X.L.Gao Y.Gao Y.Gao Y.G.Gao Z.Gao B.Garillon I.Garzia E.M.Gersabeck A.Gilman K.Goetzen L.Gong W.X.Gong W.Gradl M.Greco L.M.Gu M.H.Gu Y.T.Gu A.Q.Guo F.K.Guo L.B.Guo R.P.Guo Y.P.Guo A.Guskov S.Han X.Q.Hao F.A.Harris K.L.He F.H.Heinsius T.Held Y.K.Heng Y.R.Hou Z.L.Hou H.M.Hu J.F.Hu T.Hu Y.Hu G.S.Huang J.S.Huang X.T.Huang X.Z.Huang Z.L.Huang N.Huesken T.Hussain W.Ikegami Andersson W.Imoehl M.Irshad Q.Ji Q.P.Ji X.B.Ji X.L.Ji H.L.Jiang X.S.Jiang X.Y.Jiang J.B.Jiao Z.Jiao D.P.Jin S.Jin Y.Jin T.Johansson N.Kalantar-Nayestanaki X.S.Kang R.Kappert M.Kavatsyuk B.C.Ke I.K.Keshk T.Khan A.Khoukaz P.Kiese R.Kiuchi R.Kliemt L.Koch O.B.Kolcu B.Kopf M.Kuemmel M.Kuessner A.Kupsc M.Kurth M.G.Kurth W.Kuhn J.S.Lange P.Larin L.Lavezzi H.Leithoff T.Lenz C.Li Cheng Li D.M.Li F.Li F.Y.Li G.Li H.B.Li H.J.Li J.C.Li J.W.Li Ke Li L.K.Li Lei Li P.L.Li P.R.Li Q.Y.Li W.D.Li W.G.Li X.H.Li X.L.Li X.N.Li X.Q.Li Z.B.Li H.Liang H.Liang Y.F.Liang Y.T.Liang G.R.Liao L.Z.Liao J.Libby C.X.Lin D.X.Lin Y.J.Lin B.Liu B.J.Liu C.X.Liu D.Liu D.Y.Liu F.H.Liu Fang Liu Feng Liu H.B.Liu H.M.Liu Huanhuan Liu Huihui Liu J.B.Liu J.Y.Liu K.Y.Liu Ke Liu Q.Liu S.B.Liu T.Liu X.Liu X.Y.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. 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

There has recently been a dramatic renewal of interest in hadron spectroscopy and charm physics. This renaissance has been driven in part by the discovery of a plethora of charmonium-like XYZ states at BESⅢ and B factories, and the observation of an intriguing proton-antiproton threshold enhancement and the possibly related X(1835) meson state at BESⅢ, as well as the threshold measurements of charm mesons and charm baryons. We present a detailed survey of the important topics in tau-charm physics and hadron physics that can be further explored at BESⅢ during the remaining operation period of BEPCⅡ. This survey will help in the optimization of the data-taking plan over the coming years, and provides physics motivation for the possible upgrade of BEPCⅡ to higher luminosity.

关键词： meson hadron optimization

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Evidence for the decays of ∧_c^+→∑^+η and ∑^+η’

引用

Chinese Physics C 2019年第8期43卷 15-23页

作者： M.Ablikim F.F.An Q.An Y.Bai Y.Ban H.Cai X.Cai G.F.Cao J.F.Chang G.Chen H.S.Chen J.C.Chen M.L.Chen P.L.Chen S.J.Chen Y.B.Chen W.Cheng H.LDai J.P.Dai Z.Y.deng Y.Ding C.Dong J.Dong L.Y.Dong M.Y.Dong Z.L.Dou S.X.Du P.F.Duan J.Z.Fan J.Fang S.S.Fang Y.Fang C.Q.Feng C.D.Fu Y.Fu Q.Gao X.L.Gao Y.Gao Y.G.Gao Z.Gao L.Gong W.X.Gong L.M.Gu M.H.Gu Y.T.Gu A.Q.Guo L.B.Guo R.P.Guo Y.P.Guo S.Han X.Q.Hao K.L.He 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 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 X.S.Kang B.C.Ke 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 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 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.Liu K.Y.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 T.Luo X.L.Luo 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 Y.J.Mao Z.P.Mao Z.X.Meng J.Min T.J.Min X.H.Mo Y.J.Mo Z.Ning S.L.Niu S.L.Olsen Q.Ouyang Y.Pan H.P.Peng J.L.Ping R.G.Ping H.R.Qi M.Qi T.Y.Qi S.Qian C.F.Qiao N.Qin Z.H.Qin J.F.Qiu S.Q.Qu G.Rong W.Shan X.Y.Shan M.Shao C.P. Shen P.X.Shen X.Y.Shen H.Y.Sheng X.Shi J.J.Song X.Y.Song G.X.Sun J.F.Sun L.Sun S.S.Sun X.H.Sun Y.J.Sun Y.K.Sun Y.Z.Sun Z.J.Sun Z.T.Sun Y.T.Tan C.J.Tang G.Y.Tang X.Tang B.Wang B.L.Wang C.W.Wang D.Y.Wang Dan Wang K.Wang L.L.Wang L.S.Wang M.Wang Meng Wang P.Wang P.L.Wang W.P.Wang X.F.Wang Y.Wang Y.F.Wang Z.Wang Z.G.Wang Z.Y.Wang Zongyuan Wang D.H.Wei S.P.Wen L.H.Wu L.J.Wu Z.Wu L.Xia Y.Xia D.Xiao Y.J.Xiao Z.J.Xiao Y.G.Xie Y.H.Xie X.A.Xiong Q.L.Xiu G.F.Xu J.J.Xu L.Xu Q.J.Xu Q.N.Xu X.P.Xu F.Yan L.Yan w.B.Yan W.C.Yan Y.H.Yan H.J.Yang H.X.Yang L.Yang S.L.Yang Y.H.Yang Y.X.Yang Yifan Yang Z.Q.Yang M.Ye M.H.Ye J.H.Yin Z.Y.You B.X.Yu C.X.Yu J.S.Yu C.Z.Yuan Y.Yuan Y.Zeng B.X.Zhang B.Y.Zhang Institute of High Energy Physics G.I.Budker Institute of Nuclear Physics SB RAS(BINP) the Novosibirsk State University Helmholtz Institute Mainz Bochum Ruhr-University University of Turin infn State Key Laboratory of Particle detection and Electronics University of Science and Technology of China Southeast University Joint Institute for Nuclear Research infn laboratori nazionali di Frascati Peking University Institute of Physics and Technology Indiana University Bloomington Carnegie Mellon University Johannes Gutenberg University of Mainz infn Sezione di Ferrara Wuhan University Ankara University University of Chinese Academy of Sciences Istanbul Bilgi University the Moscow Institute of Physics and Technology the Functional Electronics Laboratory Tomsk State University University of South China Nanjing University Shanghai Jiao Tong University Key Laboratory for Particle Physics Astrophysics and CosmologyMinistry of EducationShanghai Key Laboratory for Particle Physics and CosmologyInstitute of Nuclear and Particle Physics Liaoning University Nankai University Zhengzhou University Tsinghua University University of Ferrara University of Eastern Piedmont Central China Normal University University of Minnesota Minneapolis GSI Helmholtzcentre for Heavy Ion Research GmbH Guangxi University Nanjing Normal University KVI-CART University of Groningen Henan Normal University University of Hawaii Honolulu Shandong University University of the Punjab University of Muenster Uppsala University Huangshan College University of Jinan Justus-Liebig-Universitaet Giessen II.Physikalisches Institut Istanbul Arel University Soochow University Beijing Institute of Petrochemical Technology China Center of Advanced Science and Technology Sun Yat-Sen University Sichuan University Guangxi Normal University Indian Institute of Technology Madras Shanxi University Henan University of Science and Technology Lanzhou University Zhejiang University Fudan University Key Laboratory of Nuclear Physics and Ion-beam Application(MOE)and Institute of

We study the hadronic decays of ∧c+ to the final states ∑+η and ∑+η’,using an e+e-annihilation data sample of 567 pb-1 taken at a center-of-mass energy of 4.6 GeV with the BESIII detector at the BEPCⅡ *** find evidence for the decays ∧c+→∑+η and ∑+η’ with statistical significance of 2.5σ and 3.2σ,*** to the reference decays ∧c+→∑+π0 and ∑+ω,we obtain the ratios of the branching fractions■and ■to be 0.35±0.16±0.02 and 0.86±0.34±0.04,*** upper limits at the 90% confidence level are set to be■and■.Using BESIII measurements of the branching fractions of the reference decays,we determine B（∧c+→∑+η）=（0.41±0.19±0.05）%（<0.68%）and B（∧c+→∑+η’）=（1.34±0.53 ±0.19）%（<1.9%）.Here,the first uncertainties are statistical and the second *** obtained branching fraction of ∧c+→∑+η is consistent with the previous measurement,and the branching fraction of ∧c+→∑+η’ is measured for the first time.

关键词： charmed baryon ∧c^+ decays branching fractions

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