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Acta Metallurgica sinica(English letters) 2002年第2期15卷 167-171页

作者： j.l. xu, f.s. liu, c.g. zhou, s.k. gong and h.b. xu department of material science and engineering, beijing university of aeronautics and astronautics, beijing 100083, china Dept. of Mat. sci. and Eng. Beijing Univ. of Aero. and Astron. Beijing 100083 China

A multi-component diff.s.on coating has been developed to protect Mo-based alloys from high temperature environmental attack. Aluminum addition was made during the coating process to improve the oxidation resistance by developing hexagonal Mo(si, Al)2 through the development of the halide activated pack cementation coating process on pure Mo substrate. The results show that Mo(si, Al)2 formed as a main phase on the surface and a little amount of Mo5si3 also formed. The total thickness of coating is tens ofμm at 1373k. During the cyclic oxidation test at high temperature(at about 1323k in air), mullite (3Al2O3.2siO2) and some siO2 formed. The addition of Al is beneficial for Mosi2 coating and the Al-doped coating exh.b.ted only a small weight gain and protected the Mo substrate, while the Mosi2 coating without Al suffered a significant weight loss, indicating a loss of volatile MoO3 after cycles.

关键词： multi-component coating Mo(si A1)2 halide activated pack cementation 3Al2 O3. 2siO2 oxidation resistance

Amplitude analysis of the decays D^(0)→π^(+)π^(−)π^(+)π^(−)and D^(0)→π^(+)π^(−)π^(0)π^(0)

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chinese Physics c 2024年第8期48卷 6-33页

作者： M.Ablikim M.N.Achasov P.Adlarson O.Afedulidis X.c.Ai R.Aliberti A.Amoroso Q.An Y.bai O.bakina I.balossino Y.ban h.-R.bao V.batozskaya k.begzsuren N.berger M.berlowski M.bertani D.bettoni f.bianchi E.bianco A.bortone I.boyko R.A.briere A.brueggemann h.cai X.cai A.calcaterra g.f.cao N.cao s.A.cetin j.f.chang W.l.chang g.R.che g.chelkov c.chen c.h.chen chao chen g.chen h.s.chen M.l.chen s.j.chen s.l.chen s.M.chen T.chen X.R.chen X.T.chen Y.b.chen Y.Q.chen Z.j.chen Z.Y.chen s.k.choi X.chu g.cibinetto f.cossio j.j.cui h.l.Dai j.P.Dai A.Dbeyssi R.E.de boer D.Dedovich c.Q.Deng Z.Y.Deng A.Denig I.Denysenko M.Destefanis f.De Mori b.fang s.s.fang W.X.fang Y.fang Y.Q.fang R.farinelli l.fava f.feldbauer g.felici c.Q.feng j.h.feng Y.T.feng k.f.s.her M.fritsch c.D.fu j.l.fu Y.W.fu h.gao Y.N.gao Yang gao s.garbolino I.garzia P.T.ge Z.W.ge c.g.ng E.M.gersabeck 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 Z.h.Duan P.Egorov Y.h.fan j.fang jA.gilman k.goetzen l.gong W.X.gong W.gradl s.gramigna M.greco M.h.gu Y.T.gu c.Y.guan Z.l.guan A.Q.guo l.b.guo M.j.guo R.P.guo Y.P.guo A.guskov j.gutierrez k.l.han T.T.han X.Q.hao f.A.harris.k.k.he k.l.he f.h.heinsius c.h.heinz Y.k.heng c.herold T.holtmann P.c.hong g.Y.hou X.T.hou Y.R.hou Z.l.hou b.Y.hu h.M.hu j.f.hu T.hu Y.hu g.s.huang k.X.huang l.Q.huang X.T.huang Y.P.huang T.hussain f.h\"olzken N.h\"usken N.in der Wiesche M.Irshad j.jackson s.janchiv j.h.jeong Q.ji Q.P.ji W.ji X.b.ji X.l.ji Y.Y.ji X.Q.jia Z.k.jia D.jiang h.b.jiang P.c.jiang s.s.jiang T.j.jiang X.s.jiang Y.jiang j.b.jiao j.k.jiao Z.jiao s.jin Y.jin M.Q.jing X.M.jing T.johansson s.k.bana N.kalantar-Nayestanaki X.l.kang X.s.k.ng M.kavatsyuk b.c.ke V.khachatryan A.khoukaz R.kiuchi O.b.kolcu b.kopf M.kuessner X.kui A.kupsc W.k\"uhn j.j.l.ne P.larin l.lavezzi T.T.lei 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.b.li h.j.l. h.N.li hui li j.R.li j.s.li k.li l.j.l. 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 Y Institute of high Energy Physics Chinese Academy of SciencesBeijing 100049China beihang university Beijing 100191China 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 410083China china center of Advanced science and Technology Beijing 100190China 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 541004China guangxi university Nanning 530004China hangzhou Normal university Hangzhou 310036China h.b.i university Baoding 071002China helmholtz Institute Mainz Staudinger Weg 18D-55099 MainzGermany henan Normal university Xinxiang 453007China henan university Kaifeng 475004China 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 Inner Mongolia university Hohhot 010021China Institute of Modern Physics Lanzhou 730000China Institute of Physics and Technology Peace Avenue 54BUlaanbaatar 13330Mongolia Instituto de A

Using e^(+)e^(−)annihilation data corresponding to an integrated luminosity of 2.93 fb^(−1)taken at the center-of-mass energy√s=3.773 geV with the bEsIII detector,a joint amplitude analysis is performed on the decays D^(0)→π^(+)π^(−)π^(+)π^(−)and D^(0)→π^(+)π^(−)π^(0)π^(0)(non-η).The fit fractions of individual components are obtained,and large interferences among the dominant components of the decays D^(0)→a_(1)(1260)π,D^(0)→π(1300)π,D^(0)→ρ(770)ρ(770),and D^(0)→2(ππ)_(s)are observed in both *** the obtained amplitude model,the cP-even fractions of D^(0)→π^(+)π^(−)π^(+)π^(−)and D^(0)→π^(+)π^(−)π^(0)π^(0)(non-η)are determined to be(75.2±1.1_(stat).±1.5_(syst.))%and(68.9±1.5_(stat).±2.4_(syst.))%,*** branching fractions of D^(0)→π^(+)π^(−)π^(+)π^(−)and D^(0)→π^(+)π^(−)π^(0)π^(0)(non-η)are measured to be(0.688±0.010_(stat.)±0.010_(syst.))%and(0.951±0.025_(stat.)±0.021_(syst.))%,*** amplitude analysis provides an important model for the binning strategy in measuring the strong phase parameters of D^(0)→4πwhen used to determine the ckM angleγ(ϕ_(3))via the b^(−)→Dk^(−)decay.

关键词： bEsIII D^(0)meson decays amplitude analysis cP-even fraction

INVEsTIgATIONs　ON　ThE　fORMATION　Of　INITIAl　cRAcks　IN　ThERMAl　bARRIER　cOATINgs　PREPARED　bY　Eb－PVD

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Acta Metallurgica sinica(English letters) 1996年第6期9卷 519-522页

作者： s.k.gong l. Deng f.s.liu and h.b.xu(department of material science and engineering,beijing university of aeronautics and astronautics,beijing 100083,china ) beijing Univ of aeronautics and Astronautics Beijing China

This paper deals with the mechanism of the formation of initial cracks in the yttria partially stabilized zirconia thermal barrier coatings prepared by Eb-PVD *** microcracks were only rec.g.ized inside the ceramic top coat of the thermalcycled Tbcs. sEM/EDs observations indicated that some special oxides exist in the area just below the *** seems that the formation of the initial cracks can result from the oxidation stress as well as the thermal stress.

关键词： Tbcs Eb-PVD thermocycle initial cracks

Optimization of performance of the kM2A full array using the crab Nebula

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chinese Physics c 2024年第6期48卷 169-178页

作者：曹臻 f.Aharonian 安琪阿西克古白云翔包逸炜 D.bastieri 毕效军毕玉江蔡金庭曹晴曹文羽曹喆常进常劲帆陈尚明陈恩生陈亮陈林陈龙陈明君陈玛丽陈起辉陈素弘陈天禄陈阳程宁程耀东崔明阳崔树旺崔晓红崔昱东戴本忠代洪亮戴子高单增罗布 D.della Volpe 董绪强段凯凯樊军辉范一中方军方堃冯存峰封莉冯少辉丰晓婷冯有亮 s.gabici 高博高川东高林青高启高卫高伟康葛茂茂耿利斯 g.giacinti 龚光华苟全补顾旻皓郭福来郭晓磊郭义庆郭莹莹韩毅昂何会海贺昊宁何佳银何新波何钰 M.heller 贺远强侯博文侯超侯贤胡红波胡铨胡世聪黄代绘黄天奇黄文俊黄性涛黄晓渊黄勇黄志成季筱璐贾焕玉贾康江琨姜晓巍姜泽军金敏康明铭柯通 D.kuleshov.k.kurinov 李兵兵李澄李骢李丹李飞李海波李会财李华阳李军李剑李捷李凯李文龙李文莲李秀荣李昕李一卓李哲黎卓梁恩维梁云峰林苏杰刘冰刘成刘栋刘虎刘海东刘佳刘江来刘金艳刘茂元柳若愚刘四明刘伟刘怡刘以农鲁睿罗晴吕洪魁马伯强马玲玲马欣华毛基荣闵振 W.Mitthumsiri 穆慧君南云程 A.Neronov 区子维庞彬宇 P.Pattarakijwanich 裴致远齐孟尧祁业情乔冰强秦家军 D.Ruffolo A.sáiz D.semikoz 邵澄宇邵琅 O.shchegolev 盛祥东舒富文宋慧超 Yu.V.stenkin V.stepanov 苏扬孙秦宁孙晓娜孙志斌谭柏轩唐庆文唐泽波田文武王超王昌贝王广威王洪光王惠惠王建成汪凯王利苹王玲玉王培汉王冉王为王祥高王祥玉王阳王玉东王岩谨王忠海王仲翔王振王铮韦大明魏俊杰魏永健文韬吴超勇吴含荣武莎吴雪峰吴雨生席邵强夏捷夏君集项光漫肖迪泫肖刚辛广广辛玉良邢祎熊峥徐东莲徐仁峰徐仁新徐伟立薛良闫大海颜景志颜田杨朝文杨帆杨冯帆杨何文杨佳盈杨莉莉杨明洁杨睿智杨深邦姚玉华姚志国叶一锰尹丽巧尹娜游晓浩游智勇于艳红袁强岳华曾厚敦曾婷轩曾玮查敏张彬彬张丰张海明张恒英张建立张丽霞张力张鹏飞张佩佩张瑞张少博张少如张寿山张潇张笑鹏张云峰张毅张勇赵兵赵静赵雷赵立志赵世平郑福周斌周浩周佳能周猛周平周荣周勋秀祝成光祝凤荣朱辉朱科军左雄 lhAAsO collaboration key laboratory of Particle Astrophyics&Experimental Physics Division&computing center Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China university of chinese Academy of sciences Beijing 100049China Tianfu cosmic Ray Research center Chengdu 610000China Dublin Institute for Advanced studies 31 Fitzwilliam Place2 DublinIreland Max-Planck-Institut for Nuclear Physics P.O.Box 10398069029 HeidelbergGermany state key laboratory of Particle Detection and Electronics China university of science and Technology of china Hefei 230026China school of Physical science and Technology&school of Information science and Technology Southwest Jiaotong UniversityChengdu 610031China school of Astronomy and space science Nanjing UniversityNanjing 210023China center for Astrophysics Guangzhou UniversityGuangzhou 510006China h.b.i Normal university Shijiazhuang 050024China key laboratory of Dark Matter and space Astronomy&key laboratory of Radio Astronomy Purple Mountain ObservatoryChinese Academy of SciencesNanjing 210023China Tsung-Dao lee Institute&school of Physics and Astronomy Shanghai Jiao Tong UniversityShanghai 200240China key laboratory for Research in galaxies and cosmology Shanghai Astronomical ObservatoryChinese Academy of SciencesShanghai 200030China key laboratory of cosmic Rays(Tibet university) Ministry of EducationLhasa 850000TibetChina National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China school of Physics and Astronomy(Zhuhai)&school of Physics(guangzhou)&sino-french Institute of Nuclear engineering and Technology(Zhuhai) Sun Yat-sen UniversityZhuhai 519000&Guangzhou 510275China school of Physics and Astronomy Yunnan UniversityKunming 650091China Département de Physique Nucléaire et corpusculaire Facultéde SciencesUniversitéde Genève24 Quai Ernest Ansermet1211 GenevaSwitzerland Institute of frontier and Interdisciplinary science Shandong UniversityQingdao 266237China APc Universit'e Paris Cit'eCNRS/IN2P3CEA/IRFUObservat

The full array of the large high Altitude Air shower Observatory(lhAAsO)has been in operation since j.l. *** its.k.lometer-square array(kM2A),we optimized the selection criteria for very high and ultrahigh energyγ-rays using data collected from August 2021 to August 2022,resulting in an improvement in significance of the detection in the crab Nebula of approximately 15%,compared with that of previous *** the implementation of these new selection criteria,the angular resolution was also significantly improved by approximately 10%at tens of *** aspects of the full kM2A array performance,such as the pointing error,were also calibrated using the crab *** resulting energy spectrum of the crab Nebula in the energy range of 10-1000 TeV are well fitted by a log-parabola model,which is consistent with the previous results from lhAAsO and other experiments.

关键词： γ-ray crab Nebula significance

The design and performance of gRD onboard the gEcAM satellite

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Radiation Detection Technology and Methods 2022年第1期6卷 43-52页

作者： Z.h.An X.l.sun D.l.Zhang s.Yang X.Q.li X.Y.Wen k.gong X.h.liang X.j.l.u Y.Q.liu Y.g.li s.l.Xiong Y.b.xu fan Zhang X.Y.Zhao c.cai Z.chang g.chen c.chen Y.Y.Du P.Y.feng M.gao R.gao D.Y.guo j.j.he D.j.hou c.Y.li g.li l.li X.f.li M.s.li f.j.l. h.lu b.Meng W.X.Peng f.s.i h.Wang j.Z.Wang Y.s.Wang h.Z.Wang X.Wen s.Xiao Y.P.xu j.W.Yang Q.b.Yi s.N.Zhang c.Y.Zhang c.M.Zhang fei Zhang Y.Zhao X.zhou cAs Institute of High Energy PhysicsBeijing 100049China state key laboratory of Particle Detection and Electronics Beijing 100049China 3 Xiangtan UniversityXiangtan 411105China 4 Beijing Normal UniversityBeijing 110875China Xiangtan university Xiangtan 411105China beijing Normal university Beijing 110875China

bac.g.ound Each gEcAM satellite payload contains 25 gamma-ray detectors(gRDs),which can detect gamma-rays and particles and can roughly localize the gamma-Ray bursts(gRbs).gRD was designed using lanthanum bromide(labr3)crystal as the sensitive material with the rear end coupled with silicon photomultiplier(siPM)array for *** In aerospace engineering design of gRD,there are many key points to be *** this paper,we present the specific design scheme of gRD,the assembly and the performance test results of *** based on Monte carlo simulation and experimental test results,the specific schematic design and assembling process of gRD were *** being fully assembled,the gRDs were conducted performance tests by using radioactive source and also conducted random vibration *** and conclusion The test results show that all satellite-borne gRDs have energy resolutionkeV,meeting requirements of.s.tellite in scientific *** random vibration test shows that gRD can maintain in a stable performance,which meets the requirement of.s.atial application.

关键词： lanthanum bromide scintillator siPM array gEcAM gamma-ray detector Energy resolution

Reconstruction of cherenkov image bymultiple telescopes of lhAAsO-WfcTA

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Radiation Detection Technology and Methods 2022年第4期6卷 544-557页

作者： f.Aharonian Q.An Axikegu l.X.bai Y.X.bai Y.W.bao D.bastieri X.j.bi Y.j.bi j.T.cai Zhe cao Zhen cao j.chang j.f.chang E.s.chen liang chen liang chen long chen M.j.chen M.l.chen Q.h.chen s.h.chen s.Z.chen T.l.chen Y.chen h.l.cheng N.cheng Y.D.cheng s.W.cui X.h.cui Y.D.cui b.D’Ettorre Piazzoli b.Z.Dai h.l.Dai Z.g.Dai Danzengluobu Ddella Volpe k.k.Duan j.h.fan Y.Z.fan Z.X.fan j.fang k.fang c.f.feng l.feng s.h.feng X.T.feng Y.l.feng b.gao c.D.gao l.Q.gao Q.gao W.gao W.k.gao M.M.ge l.s.geng g.h.gong Q.b.gou M.h.gu f.l.guo j.g.guo X.l.guo Y.Q.guo Y.Y.guo Y.A.han h.h.he h.N.he s.l.he X.b.he Y.he M.heller Y.k.hor c.hou X.hou h.b.hu Q.hu s.hu s.c.hu X.j.hu D.h.huang W.h.huang X.T.huang X.Y.huang Y.huang Z.c.huang X.l.ji h.Y.jia k.jia k.jiang Z.j.jiang M.jin M.M.kang T.ke D.kuleshov k.levochkin b.b.li cheng li cong li f.li h.b.li h.c.li h.Y.li j.l. jian li jie li k.li Wlli XRli Xin li Xin li YZli Zhe li Zhuo li E.W.liang Y.f.liang s.j.l.n b.liu c.liu D.liu h.liu h.D.liu j.l.u j.l.liu j.s.liu j.Y.liu M.Y.liu R.Y.liu s.M.liu W.liu Y.liu Y.N.liu W.j.l.ng R.lu Q.luo h.k.lv b.Q.Ma l.l.Ma X.h.Ma j.R.Mao A.Masood Z.Min W.Mitthumsiri Y.c.Nan Z.W.Ou b.Y.Pang P.Pattarakijwanich Z.Y.Pei M.Y.Qi Y.Q.Qi b.Q.Qiao j.j.Qin D.Ruffolo A.sáiz c.Y.shao l.shao O.shchegolev X.D.sheng j.Y.shi h.c.song Yu.V.stenkin V.stepanov Y.su Q.N.sun X.N.sun Z.b.sun P.h.T.Tam Z.b.Tang W.W.Tian b.D.Wang c.Wang h.Wang h.g.Wang j.c.Wang j.s.Wang l.P.Wang l.Y.Wang R.Wang R.N.Wang W.Wang X.g.Wang X.Y.Wang Y.Wang Y.D.Wang Y.j.Wang Y.P.Wang Z.h.Wang Z.X.Wang Zhen Wang Zheng Wang D.M.Wei j.j.Wei Y.j.Wei T.Wen c.Y.Wu h.R.Wu s.Wu X.f.Wu Y.s.Wu s.Q.Xi j.Xia j.j.Xia g.M.Xiang D.X.Xiao g.Xiao g.g.Xin Y.l.Xin Y.Xing Z.Xiong D.l.xu R.X.xu l.xue D.h.Yan j.Z.Yan c.W.Yang f.f.Yang h.W.Yang j.Y.Yang l.l.Yang M.j.Yang R.Z.Yang s.b.Yang Y.h.Yao Z.g.Yao Y.M.Ye l.Q.Yin N.Yin X.h.You Z.Y.You Y.h.Yu Q.Yuan h.Yue h.D.Zeng T.X.Zeng W.Zeng Z.k.Zeng M.Zha X.X.Zhai b.b.Zhang f.Zhang h.M.Zhang h.Y.Zhang j.l.Zhang l.X.Zhang li Zhang lu Zhang P.f.Zhang P.P.Zhang R.Zhang s.b.Zhang s.R.Zhang s. key laboratory of Particle Astrophyics&Experimental Physics Division&computing center Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China university of chinese Academy of sciences Beijing 100049China TIANfU cosmic Ray Research center ChengduSichuanChina Dublin Institute for Advanced studies 31 Fitzwilliam Place2DublinIreland Max-Planck-Institut for Nuclear Physics P.O.Box 10398069029 HeidelbergGermany state key laboratory of Particle Detection and Electronics BeijingChina university of science and Technology of china Hefei 230026AnhuiChina school of Physical science and Technology&school of Information science and Technology Southwest Jiaotong UniversityChengdu 610031SichuanChina college of Physics Sichuan UniversityChengdu 610065SichuanChina school of Astronomy and space science Nanjing UniversityNanjing 210023JiangsuChina center for Astrophysics Guangzhou UniversityGuangzhou 510006GuangdongChina key laboratory of Dark Matter and space Astronomy&key laboratory of Radio Astronomy Purple Mountain ObservatoryChinese Academy of SciencesNanjing 210023JiangsuChina key laboratory for Research in galaxies and cosmology Shanghai Astronomical ObservatoryChinese Academy of SciencesShanghai 200030China key laboratory of cosmic Rays(Tibet university) Ministry of EducationLhasa 850000TibetChina National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China h.b.i Normal university Shijiazhuang 050024HebeiChina school of Physics and Astronomy(Zhuhai)&sino-french Institute of Nuclear engineering and Technology(Zhuhai) Sun Yat-sen UniversityZhuhai 519000China school of Physics(guangzhou) Sun Yat-sen UniversityGuangzhou 510275GuangdongChina Dipartimento di f.s.ca dell’Universitàdi Napoli“federico II” Complesso Universitario di Monte Sant’Angelovia Cinthia80126 NapoliItaly school of Physics and Astronomy Yunnan UniversityKunming 650091YunnanChina Département de Physique Nucléaire et corpusculaire Facultéde SciencesUniversitéde Genève

Introduction One of main scientiﬁc.g.als of the large high Altitude Air shower Observatory(lhAAsO)is to accurately measure the energy spectra of different cosmic ray compositions around the‘knee’*** Wide field-of-View(foV)cherenkov Telescope Array(WfcTA),which is one of the main detectors of lhAAsO and has 18 telescopes,is built to achieve this *** telescopes are put together and point to connected directions for a larger *** Telescopes are deployed spatially as close as possible,but due to their own size,the distance between two adjacent telescopes is about 10 ***,the cherenkov lateral distribution and the parallax between the two telescopes should be considered in the event building process for images crossing over the boundaries of foVs of the *** event building method for cherenkov images measured by multiple telescopes of WfcTA is *** performance of the shower measurements using the combined images is evaluated by comparing with showers that are fully contained by a virtual telescope in *** and conclusion It is proved that the developed event building process can help to increase the foV of WfcTA by 30%while maintaining the same reconstruction quality,compared to the separate telescope reconstruction method.

关键词： method directions conclusion

Observation of the Y(4230)and a new structure in e^(+)e^(-)→k^(+)k^(-)j/Ψ

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chinese Physics c 2022年第11期46卷 7-21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 陈琛陈刚陈和生陈玛丽陈申见 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.Ede 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.f.s.her M.fritsch c.fritzsch 傅成栋高涵高原宁高扬 s.garbolino I.garzia 葛潘婷耿聪 E.M.gersabeck A gilman k.goetzen 龚丽龚文煊 W.gradl M.greco 顾旻皓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 T.holtmann 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 Z.huang T.hussain N hüsken W.Imoehl M.Irshad j.jackson s.jaeger s.janchiv Q.ji 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 M.kavatsyuk 柯百谦 I.k.kes.k.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.l.ne j.s.lange P.larin A.lavania l.lavezzi 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贺 h.li 李海波李惠静 h.N.li j.Q.li 李静舒李井文李科 l.j.l. 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紫源梁浩梁昊梁浩梁勇飞梁羽铁廖广睿廖龙洲 j.l.bby A.limphirat c.X.lin 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 fEMaas 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 h.Muramatsu Y.Nefedov f.Nerling I.b.Nikolaev 宁哲 s.Nisar 牛艳 s.l.Olsen 欧阳群 s.Pacetti 潘祥 Y.Pan A.Pathak A.Pathak M.Pelizaeus 彭海平 k.Peters j.Pettersson 平加伦平荣刚 s.Plura s.Pogodin R.Poling V.Prasad 齐法制齐航漆红荣祈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 s.Q.Qu 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 j.l.n 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

The cross sections of e^(+)e^(-)→k^(+)k^(-)j/Ψat center-of-mass energies from 4.127 to 4.600 geV are measured based on 15.6 fb-1data collected with the bEsⅢ detector operating at the bEPcⅡ storage *** resonant structures are observed in the line shape of the cross *** mass and width of the first structure are measured to be(4225.3±2.3±21.5)MeV and(72.9±6.1±30.8)MeV,*** are consistent with those of the established Y(4230).The second structure is observed for the first time with a statistical significance greater than 8σ,denoted as Y(4500).Its mass and width are determined to be(4484.7±13.3±24.1)MeV and(111.1±30.1±15.2)MeV,*** first presented uncertainties are statistical and the second ones are *** product of the electronic partial width with the decay branching fractionΓ(Y(4230)→e^(+)e^(−))b(Y(4230)→k^(+)k^(−)j/Ψ)is reported.

关键词： Y states charmonium-like states bEsⅢ

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

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中国物理c:英文版 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.Aj.l.ouni 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.bars.k.W.barter M.bartolini f.baryshnikov j.M.basels g.bassi b.bats.k. 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.bors.k.s.A.bouch.b. 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.ch.b.nova s.cholak M.chrzaszcz A.ch.b.kin 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.c.g.n E.c.g.era centro brasileiro de Pesquisas f.s.cas(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.Phys.k.lisches Institut RWTH Aachen UniversityAachenGermany fakultat Physik Technische Universitat DortmundDortmundGermany Max-Planck-Institut für kernphys.k.MPIk) HeidelbergGermany Phys.k.lisches 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 c.g.iari 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 lh.b.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

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 f.s.her 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.k.bana N.kalantar-Nayestanaki 康晓琳康晓珅 R.kappert M.kavatsyuk 柯百谦 I.k.kes.k.A.khoukaz R.kiuchi R.kliemt l.koch O.b.kolcu b.kopf M.kuemmel M.kuessner A.kupsc W.kühn j.j.l.ne 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.l. 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.l.bby 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 h.b.i 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 j.l.n 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

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 f.s.her 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.kes.k.A.khoukaz R.kiuchi R.kliemt l.koch O.b.kolcu b.kopf M.kuemmel M.kuessner A.kupsc W.kühn j.j.l.ne 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.l. 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.l.bby 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 h.b.i 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 j.l.n 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