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Photoreflectance Study of GaN Films on Sapphire Substrate

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chinese Physics Letters 1996年第2期13卷 153-156页

作者： QIN Lin-liong YANG Kai ZHENG You-clou ZHANG Rong DAI Xing-jiang FENG Duan HUANG Zhen-chun j.c.chen Department of Physics Nanjing UniversityNanjing 210093 Department of Electrical Engineering University of Maryland Baltimore CountyBaltimoreMD 21228-5398USA

Photoreflectance was used to study the optical properties of single crystal hexagonal GaN finis on(0001)sapphire substrate grown by metalorganic chemical vapor *** energy gap of GaN was determined as 3.400 eV and the possible origin of the signal was *** absorption and reflection were *** optical absorption edge of 3.38 eV,and the reilectivity peak at 3.3 eV, confirmed the results of photoreiiectance.

关键词： GaN sapphire optical

Properties of Archaeological Pottery Tile Excavated from Sanyangzhuang Site Henan, china

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Properties of Archaeological Pottery Tile Excavated from San...

International conference on Industrial Technology and Management Science(ITMS 2015)

作者： j.c.chen X.HUANG H.W.LIU R.SH.ZHU Henan Provincial Institute of cultural Relics and Archaeology School of Materials Science and Engineering Zhengzhou University

Sanyangzhuang settlement sites is a ancient villages, which are flooded by the Yellow River in early Western Han Dynasty. A large number of pottery tiles as a part of ancient villages excavated from Sanyangzhuang sites has great value in the study of early chinese village building. In order to preserved those well, we analyzed the properties of pottery tile by XRD（X-ray diffraction）, ESEM（Environment scanning electron microscope） and Electronics omnipotent material trial instrument for the component, structure and mechanical. The results shown that the pottery tile’s main ingredients is silicide with loose structure, low mechanical strength and high salt content, which is main reasons for pottery tile weather.

关键词： Han Dynasty settlement sites excavated pottery tile property

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MOcVD生长GaN膜的光调制反射谱研究

固体电子学研究与进展 1997年第2期17卷 188-192页

作者：杨凯张荣臧岚秦林洪沈波施洪涛郑有炓 Z.c.Huang j.c.chen 南京大学物理系 Dept.ofElec.Eng. Univ.ofMarylandBalitimoreCountyBaltimoreMC21008-5398USA

采用光调制反射光谱（PR）研究了（0001）晶向蓝宝石村底上MOcVD方法生长的单晶六角GaN薄膜的室温光学性质。测得六角GaN薄膜的禁带宽度为3．400eV，对PR谱的调制机理进行了分析，发现信号来自缺陷作用下的表面电场调制。光吸收增和光... 详细信息

采用光调制反射光谱（PR）研究了（0001）晶向蓝宝石村底上MOcVD方法生长的单晶六角GaN薄膜的室温光学性质。测得六角GaN薄膜的禁带宽度为3．400eV，对PR谱的调制机理进行了分析，发现信号来自缺陷作用下的表面电场调制。光吸收增和光反射谱的测量，得到3．39eV的光学吸收边和3．3eV的反射峰，证实了光调制反射光谱的结果。

关键词：氮化镓光调制反射光谱 MOcVD生长

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用刚体界面加速度估算有效载荷的载荷

导弹与航天运载技术 1988年第10期 60-70页

作者： j.c.chen 于海昌

在有效载荷结构系统的设计/分析过程中,往往使用刚体有效载荷进行系统分析,并利用得到的有效载荷/运载器。界面处的加速度作为弹性有效载荷的输入力函数来确定有效载荷结构的设计载荷。这种分析充其量是一种近似,因为忽略了弹性耦合效... 详细信息

在有效载荷结构系统的设计/分析过程中,往往使用刚体有效载荷进行系统分析,并利用得到的有效载荷/运载器。界面处的加速度作为弹性有效载荷的输入力函数来确定有效载荷结构的设计载荷。这种分析充其量是一种近似,因为忽略了弹性耦合效应。本文研究了一种计及有效载荷弹性修改的运载器/刚体有效载荷界面加速度的方法。当用一组截断的广义坐标可以描述一个物理系统时,方法是精确的,方法的优点是完整的设计/分析过程可以由负责有效载荷设计的机构来完成。本方法需要计及由于有效载荷的改变而不断修改的主振型,但不需要用组合系统模型得到的全部瞬态解。本方法已用于一个实际的复杂结构——海盗飞船系统。本文将本方法用于海盗飞船得到的结果与用一个系统模型得到的精确解做了比较。

关键词：有效载荷计算方法

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超声显微镜及其应用

声学技术 1992年第Z1期 26-28页

作者： W.S.Gan,j.c.chen,L.james,c.S.chong Acoustical Services　PTE.LTD Singapore Acoustical Services　PTE.LTD Singapore Acoustical Services　PTE.LTD Singapore Acoustical Services　PTE.LTD Singapore

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超声显微镜及其应用

声学技术 1992年第1期11卷 26-28页

作者： W.S.Gan j.c.chen L.james c.S.chong Acoustical Services PTE.LTD Singapore Acoustical Services PTE.LTD SingaporeAcoustical Services PTE.LTD SingaporeAcoustical Services PTE.LTD Singapore

Future Physics Programme of BESⅢ

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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

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

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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）%（c+→∑+η’）=（1.34±0.53 ±0.19）%（certainties 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

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