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Expected energy.spectrum of cosmic ray.protons and helium below4 PeV measured by.LHAAsO

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Chinese Phy.ics C 2019年第7期43卷 86-96页

作者： L.Q.yin s.s.zhang z.Cao B.y.Bi C.Wang j.L.liu L.L.Ma M.j.yang y.zhang z.y.y.u z.z.zong Key.Laboratory.of Particle Astrophy.ics Institute of High Energy Physics Chinese Academy of Sciences University.of Chinese Academy.of science Institut für Astronomie und Astrophy.ik Eberhard Karls Universit?t Kunming University Institut de Phy.ique Nucléaire d’Orsay IN2P3-CNRS Université Paris-Sud China Nuclear Power Engineering Co. Ltd.

the Large High Altitude Air shower Observatory.LHAAsO) is a composite cosmic ray.observatory.consisting of three detector array.: kilometer square array.KM2 A), which includes the electromagnetic detector array.and muon detector array. water Cherenkov detector array.WCDA) and wide field-of-view Cherenkov telescope array.WFCtA). One of the main scientific objectives of LHAAsO is to precisely.measure the cosmic ray. energy.spectrum of individual components from 10^14 eV to 10^18 eV. the hy.rid observation will be employ.d by.the LHAAsO experiment, in which the lateral and longitudinal distributions of extensive air shower can be observed simultaneously. thus, many.kinds of parameters can be used for primary.nuclei identification. In this paper, high purity.cosmic ray.simulation samples of the light nuclei component are obtained using multi-variable analy.is. the apertures of 1/4 LHAAsO array.for pure proton and mixed proton and helium(H&He) samples are 900 m^2 sr and1800 m^2 sr, respectively. Prospect of obtaining proton and H&He spectra from 100 teV to 4 PeV is discussed.

关键词： LHAAsO hy.rid measurement energy spectrum composition tMVA

the Lobster Ey. Imager for Astronomy.Onboard the sAtech-01 satellite

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Research in Astronomy.and Astrophy.ics 2023年第9期23卷 66-78页

作者： z.X.Ling X.j.s.n C.zhang s.L.sun g.jin s.N.zhang X.F.zhang j.B.Chang F.s.Chen y.F.Chen z.W.Cheng W.Fu y.X.Han H.Li j.F.Li y.Li z.D.Li P.R.liu y.H.Lv X.H.Ma y.j.tang C.B.Wang R.j.Xie y.L.Xue A.L.y.n Q.zhang C.y.bao H.B.Cai H.Q.Cheng C.z.Cui y.F.Dai D.W.Fan H.B.Hu j.W.Hu M.H.Huang z.Q.jia C.C.jin D.y.Li j.Q.Li H.y.liu M.j.liu y.liu H.W.Pan y.L.Qiu M.sugizaki H.sun W.X.Wang y.L.Wang Q.y.Wu X.P.Xu y.F.Xu H.N.yang X.yang B.zhang M.zhang W.D.zhang z.zhang D.H.zhao X.Q.Cong B.W.jiang L.H.Li X.B.Qiu j.N.sun D.t.su j.Wang C.Wu z.Xu X.M.yang s.K.zhang z.zhang N.zhang y.F.zhu H.y.Ban X.z.Bi z.M.Cai W.Chen X.Chen y.H.Chen y.Cui X.L.Duan z.g Feng y.gao j.W.He t.He j.j.Huang F.Li j.s.Li t.j.Li t.t.Li H.Q.liu L.liu R.liu s.liu N.Meng Q.shi A.t.sun y.M.Wang y.B.Wang H.C.Wu D.X Xu y.Q yang y.yang X.s.y. K.X.zhang y.L.zhang y.H.zhang y.t.zhang H.zhou X.C.zhu j.s.Cheng L.Qin L.Wang Q.L.Wang M.Bai R.L.gao z.ji y.R.liu F.L.Ma y.j.s.i j.s. y.y.tan j.z.tong H.t.Xu C.B.Xue g.F.Xue W.y.an National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China school of Astronomy.and space science University of Chinese Academy of SciencesBeijing 100049China shanghai Institute of technical Phy.ics Chinese Academy of SciencesShanghai 200083China North Night Vision technology.Co. LTDNanjing 211106China Institute of High Energy.Phy.ics Chinese Academy of SciencesBeijing 100049China science and technology.on Low-Light-Level Night Vision Laboratory Xi'an 710065China Innovation Academy.for Microsatellites Chinese Academy of SciencesShanghai 201204China Institute of Electrical Engineering Chinese Academy of ScienceBeijing 100190China National space science Center Chinese Academy of ScienceBeijing 100190China

the Lobster Ey. Imager for Astronomy.LEIA),a pathfinder of the Wide-field X-ray.telescope of the Einstein Probe mission,was successfully.launched onboard the sAtech-01 satellite of the Chinese Academy.of sciences on2022 july.*** this paper,we introduce the design and on-ground test results of the LEIA *** stateof-the-art Micro-Pore Optics(MPO),a wide field of view of 346 square degrees(18.6°×18.6°)of the X-ray.imager is *** optical assembly.composed of 36 MPO chips is used to focus incident X-ray.photons,and four large-format complementary.metal-oxide semiconductor(CMOs)sensors,each of size 6 cm×6 cm,are used as the focal plane *** instrument has an angular resolution of 4’-8’(in terms of FWHM)for the central focal spot of the point-spread function,and an effective area of 2-3 cm^(2) at 1 keV in essentially.all the directions within the field of *** detection passband is 0.5-4 keV in soft X-ray. and the sensitivity.is2-3×10^(-11) erg s^(-1) cm^(-2)(about 1 milliCrab)with a 1000 s *** total weight of LEIA is 56 kg and the power is 85 *** satellite,with a design lifetime of 2 y.,operates in a sun-sy.chronous orbit of 500 km with an orbital period of 95 *** is paving the way.for future missions by.verifying in flight the technologies of both novel focusing imaging optics and CMOs sensors for X-ray.observation,and by.optimizing the working setups of the instrumental *** addition,LEIA is able to carry.out scientific observations to find new transients and to monitor known sources in the soft X-ray.band,albeit with limited useful observing time available.

关键词： instrumentation detectors-space vehicles instruments-telescopes-X-ray. genera

stCF conceptual design report (Volume 1): Phy.ics & detector

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Frontiers of phy.ics 2024年第1期19卷 1-154页

作者： M.Achasov X.C.Ai L.P.An R.Aliberti Q.An X.z.Bai y.Bai O.Bakina A.Barny.kov V.Blinov V.Bobrovnikov D.Bodrov A.Bogomy.gkov A.Bondar I.Boy.o z.H.Bu F.M.Cai H.Cai j.j.Cao Q.H.Cao X.Cao z.Cao Q.Chang K.t.Chao D.y.Chen H.Chen H.X.Chen j.F.Chen K.Chen L.L.Chen P.Chen s.L.Chen s.M.Chen s.Chen s.P.Chen W.Chen X.Chen X.F.Chen X.R.Chen y.Chen y.Q.Chen H.y.Cheng j.Cheng s.Cheng t.g.Cheng j.P.Dai L.y.Dai X.C.Dai D.Dedovich A.Denig I.Denisenko j.M.Dias D.z.Ding L.y.Dong W.H.Dong V.Druzhinin D.s.Du y.j.Du z.g.Du L.M.Duan D.Epifanov y.L.Fan s.s.Fang z.j.Fang g.Fedotovich C.Q.Feng X.Feng y.t.Feng j.L.Fu j.gao y.N.gao P.s.ge C.Q.geng L.s.geng A.gilman L.gong t.g.ng B.gou W.gradl j.L.gu A.guevara L.C.gui A.Q.guo F.K.guo j.C.guo j.guo y.P.guo z.H.guo A.guskov K.L.Han L.Han M.Han X.Q.Hao j.B.He s.Q.He X.g.He y.L.He z.B.He z.X.Heng B.L.Hou t.j.Hou y.R.Hou C.y.Hu H.M.Hu K.Hu R.j.Hu W.H.Hu X.H.Hu y.C.Hu j.Hua g.s.Huang j.s.Huang M.Huang Q.y.Huang W.Q.Huang X.t.Huang X.j.Huang y.B.Huang y.s.Huang N.Hüsken V.Ivanov Q.P.ji j.j.jia s.jia z.K.jia H.B.jiang j.jiang s.z.jiang j.B.jiao z.jiao H.j.jing X.L.Kang X.s.Kang B.C.Ke M.Kenzie A.Khoukaz I.Koop E.Kravchenko A.Kuzmin y.Lei E.Levichev C.H.Li C.Li D.y.Li F.Li g.Li g.Li H.B.Li H.Li H.N.Li H.j.Li H.L.Li j.M.Li j.Li L.Li L.Li L.y.Li N.Li P.R.Li R.H.Li s.Li t.Li W.j.Li X.Li X.H.Li X.Q.Li X.H.Li y.Li y.y.Li z.j.Li H.Liang j.H.Liang y.t.Liang g.R.Liao L.z.Liao y.Liao C.X.Lin D.X.Lin X.s.Lin B.j.liu C.W.liu D.liu F.liu g.M.liu H.B.liu j.liu j.j.liu j.B.liu K.liu K.y.liu K.liu L.liu Q.liu s.B.liu t.liu X.liu y.W.liu y.liu y.L.liu z.Q.liu z.y.liu z.W.liu I.Logashenko y.Long C.g.Lu j.X.Lu N.Lu Q.F.Lü y.Lu y.Lu z.Lu P.Lukin F.j.Luo t.Luo X.F.Luo y.H.Luo H.j.Ly. X.R.Ly. j.P.Ma P.Ma y.Ma y.M.Ma F.Maas s.Malde D.Matvienko z.X.Meng R.Mitchell A.Nefediev y.Nefedov s.L.Olsen Q.Ouyang P.Pakhlov g.Pakhlova X.Pan y.Pan E.Passemar y.P.Pei H.P.Peng L.Peng X.y.Peng X.j.Peng K.Peters s.Pivovarov E.Py.ta B.B.Qi y.Q.Qi W.B.Qian y.Qian C.F.Qiao j.j.Qin j.j.Qin L.Q.Qin X.s.Qin t.L.Qiu j.Rademacker C.F.Redmer H.y.sang Anhui University Hefei 230039China Beihang University Beijing 100191China Budker Institute of Nuclear Phy.ics Novosibirsk 630090Russia CAs Key.Laboratory.of theoretical Phy.ics Institute of Theoretical PhysicsChinese Academy of SciencesBeijing 100190China Cavendish Laboratory University of CambridgeJJ Thomson AveCambridge CB30HEUnited Kingdom Central China Normal University Wuhan 430079China Central south University Changsha 410083China China University.of geosciences Wuhan 430074China China University.of Mining and technology Xuzhou 221116China École Poly.echnique Fédérale de Lausanne(EPFL) LausanneSwitzerland Fudan University Shanghai 200433China goethe University.Frankfurt D-60325 Frankfurt am MainGermany guangxi Normal University Guilin 541004China guangxi Uninversity Nanning 530004China Hangzhou Institute for Advanced study UCASHangzhou 310024China Hebei Normal University Shijiazhuang 050024China Hebei University Baoding 071002China Hefei University.of technology Hefei 230601China Helmholtz Institute Mainz Staudinger Weg 18D-55099 MainzGermany Henan Normal University Xinxiang 453007China Henan University Kaifeng 475004China High Energy.Phy.ics Center Chung-Ang UniversitySeoul 06974Korea Higher school of Economy.11 Pokrovsky.Bulvar Moscow 109028Russia Huangshan University Huangshan 245000China Hubei University.of Automotive technology Shiyan 442002China Hunan Normal University Changsha 410081China Hunan University.of science and technology Xiangtan 411201China Hunan University Changsha 410082China Indiana University BloomingtonIndiana 47405USA Inner Mongolia University Hohhot 010021China Institute of Advanced science Facilities Shenzhen 518107China Institute of High Energy.Phy.ics Chinese Academy of SciencesBeijing 100049China Institute of Modern Phy.ics Chinese Academy of SciencesLanzhou 730000China Institute of Phy.ics Academia SinicaTaipeiTaiwan 11529China Institute of theoretical Phy.ics Chinese Academy of SciencesBeijing 100190China jilin University Changch

the superτ-charm facility.stCF)is an electron–positron collider proposed by.the Chinese particle phy.ics *** is designed to operate in a center-of-mass energy.range from 2 to 7 geV with a peak luminosity.of 0.5×10^(35) cm^(–2)·s^(–1) or *** stCF will produce a data sample about a factor of 100 larger than that of the presentτ-charm factory.the BEPCII,providing a unique platform for exploring the asy.metry.of matter-antimatter(charge-parity.violation),in-depth studies of the internal structure of hadrons and the nature of non-perturbative strong interactions,as well as searching for exotic hadrons and phy.ics bey.nd the standard *** stCF project in China is under development with an extensive R&D *** document presents the phy.ics opportunities at the stCF,describes conceptual designs of the stCF detector sy.tem,and discusses future plans for detector R&D and phy.ics case studies.

关键词： electron–positron collider tau-charm region high luminosity stCF detector conceptual design

geometrical reconstruction of fluorescence events observed by.the LHAAsO experiment

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Chinese Phy.ics C 2021年第4期45卷 416-425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 H.Cai j.t.Cai z.Cao z.Cao j.Chang j.F.Chang X.C.Chang B.M.Chen j.Chen L.Chen L.Chen L.Chen M.j.Chen M.L.Chen Q.H.Chen s.H.Chen s.z.Chen t.L.Chen X.L.Chen y.Chen N.Cheng y.D.Cheng s.W.Cui X.H.Cui y.D.Cui B.z.Dai H.L.Dai z.g.Dai Danzengluobu D.della Volpe B.DEtorre Piazzoli X.j.Dong j.H.Fan y.z.Fan z.X.Fan j.Fang j.Fang C.F.Feng L.Feng s.H.Feng y.L.Feng B.gao C.D.gao Q.gao W.gao M.M.ge L.s.geng g.H.gong Q.B.gou M.H.gu j.g.guo X.L.guo y.Q.guo y.y.guo y.A.Han H.H.He H.N.He j.C.He s.L.He X.B.He y.He M.Heller y.K.Hor C.Hou X.Hou H.B.Hu s.Hu s.C.Hu X.j.Hu D.H.Huang Q.L.Huang W.H.Huang X.t.Huang z.C.Huang F.ji X.L.ji H.y.jia K.jiang z.j.jiang C.jin D.Kuleshov K.Levochkin B.B.Li C.Li C.Li F.Li H.B.Li H.C.Li H.y.Li j.Li K.Li W.L.Li X.Li X.Li X.R.Li y.Li y.z.Li z.Li z.Li E.W.Liang y.F.Liang s.j.Lin B.liu C.liu D.liu H.liu H.D.liu j.liu j.L.liu j.L.liu j.s.liu j.y.liu M.y.liu R.y.liu s.M.liu W.liu y.N.liu z.X.liu W.j.Long R.Lu H.K.Lv B.Q.Ma L.L.Ma X.H.Ma j.R.Mao A.Masood W.Mitthumsiri t.Montaruli y.C.Nan B.y..Pang P.Pattarakijwanich z.y.Pei M.y.Qi D.Ruffolo V.Rulev A.saiz L.shao O.shchegolev X.D.sheng j.R.shi H.C.song y..V.stenkin V.stepanov 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.N.Wang W.Wang W.Wang X.g.Wang X.j.Wang X.y.Wang y.D.Wang y.j.Wang y.P.Wang z.Wang z.Wang z.H.Wang z.X.Wang D.M.Wei j.j.Wei y.j.Wei t.Wen C.y.Wu H.R.Wu s.Wu W.X.Wu X.F.Wu s.Q.Xi j.Xia j.j.Xia g.M.Xiang g.Xiao H.B.Xiao g.g.Xin y.L.Xin y.Xing D.L.Xu R.X.Xu L.Xue D.H.y.n C.W.yang F.F.yang j.y.yang L.L.yang M.j.yang R.z.y.ng s.B.yang y.H.y.o z.g.y.o y.M.y. L.Q.yin N.yin X.H.y.u z.y.y.u y.H.y. Q.y.an H.D.zeng t.X.zeng W.zeng z.K.zeng M.zha X.X.zhai B.B.zhang H.M.zhang H.y.zhang j.L.zhang j.W.zhang L.zhang L.zhang L.X.zhang P.F.zhang P.F.zhang R.zhang s.R.zhang s.s.zhang X.zhang X.P.zhang y.zhang y.zhang y.F.zhang y.L.zhang B.zhao j.zhao L.zhao L.z.zhao s.P.zhao F.zheng y.zheng B.zhou H.zhou j.N.zhou P Key.Laboratory.of Particle Astrophy.cs&Experimental Phy.ics 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 state Key.Laboratory.of Paricle Detection and Electronics China University.of science and technology.of China HefeiAnhui 230026China Department of Engineering Phy.ics Tsinghua UniversityBeijing 100084China National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China National space science Center Chinese Academy of SciencesBeijing 100190China school of Phy.ics Peking UniversityBeijing 100871China Center for Astrophy.ics Guangzhou UniversityGuangzhouGuangdong 510006China school of Phy.ics and Astronomy.school of Phy.ics(guangzhou) Sun Yat-sen UniversityZhuhaiGuangdong 519000China school of Phy.ical science and technology Guangxi UniversityNanningGuangxi 530004China Hebei Normal University ShijiazhuangHebei 050024China school of Phy.ics and Microelectronics Zhengzhou UniversityZhengzhouHenan 450001China school of Astronomy.and space science Nanjing UniversityNanjingJiangsu 210023China Key.Laboratory.of Dark Matter and space Astronomy Purple Mountain ObservatoryChinese Academy of SciencesNanjingJiangsu 210023China Institute of Frontier and Interdisciplinary.science Shandong UniversityQingdaoShandong 266237China Key.Laboratory.for Research in galaxies and Cosmology Shanghai Astronomical ObservatoryChinese Academy of SciencesShanghai 200030China tsung-Dao Lee Institute&school of Phy.ics and Astronomy Shanghai Jiao Tong UniversityShanghai 200240China school of Phy.ical science and technology Southwest Jiaotong UniversityChengduSichuan 610031China College of Phy.ics Sichuan UniversityChengduSichuan 610065China Key.Laboratory.of Cosmic Ray.(tibet University. Ministry of EducationLhasaTibet 850000China school of phy.ics and technology Wuhan UniversityWuhanHubei 430072Ch

the LHAAsO-WFCtA experiment,which aims to observe cosmic ray. in the sub-EeV range using the fluorescence technique,uses a new generation of high-performance *** ensure that the experiment has ex-cellent detection capability.associated with the measurement of the energy.spectrum,the primary.composition of cosmic ray.,and so on,an accurate geometrical reconstruction of air-shower events is *** paper de-scribes the development and testing of geometrical reconstruction for stereo viewed events using the WFCtA(Wide Field of view Cherenkov/Fluorescence telescope Array.*** approaches,which take full advant.g. ofthe WFCtA *** *** is the stereo-angular method,which uses the pointing of triggered siPMs in the shower trajectory.and the other is the stereo-timing method,which uses the triggering time of the fired *** results show that both methods have good geometrical resolution:the resolution of the stereo-timing method is slightly.better than the stereo-angular method because the resolution of the latter is slightly.limited by.the shower track length.

关键词： cosmic ray fluorescence telescope stereo observation geometrical reconstruction

Observation of the Crab Nebula with LHAAsO-KM2A−a performance study

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Chinese Phy.ics C 2021年第2期45卷 518-530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 H.Cai j.t.Cai z.Cao j.Chang j.F.Chang X.C.Chang B.M.Chen j.Chen L.Chen M.j.Chen M.L.Chen Q.H.Chen s.H.Chen s.z.Chen t.L.Chen X.L.Chen y.Chen N.Cheng y.D.Cheng s.W.Cui X.H.Cui y.D.Cui B.z.Dai H.L.Dai z.g.Dai D.della Volpe B.D'Ettorre Piazzoli X.j.Dong j.H.Fan y.z.Fan z.X.Fan j.Fang K.Fang C.F.Feng L.Feng s.H.Feng y.L.Feng B.gao C.D.gao Q.gao W.gao M.M.ge L.s.geng g.H.gong Q.B.gou M.H.gu j.g.guo X.L.guo y.Q.guo y.y.guo y.A.Han H.H.He H.N.He j.C.He s.L.He X.B.He y.He M.Heller y.K.Hor C.Hou X.Hou H.B.Hu s.Hu s.C.Hu X.j.Hu D.H.Huang Q.L.Huang W.H.Huang X.t.Huang z.C.Huang F.ji X.L.ji H.y.jia K.jiang z.j.jiang C.jin D.Kuleshov K.Levochkin B.B.Li C.Li F.Li H.B.Li H.C.Li H.y.Li j.Li K.Li W.L.Li X.Li X.R.Li y.Li y.z.Li z.Li E.W.Liang y.F.Liang s.j.Lin B.liu C.liu D.liu H.liu H.D.liu j.liu j.L.liu j.s.liu j.y.liu M.y.liu R.y.liu s.M.liu W.liu y.N.liu z.X.liu W.j.Long R.Lu H.K.Lv B.Q.Ma L.L.Ma X.H.Ma j.R.Mao A.Masood W.Mitthumsiri t.Montaruli y.C.Nan B.y.Pang P.Pattarakijwanich z.y.Pei M.y.Qi D.Ruffolo V.Rulev A.sáiz L.shao O.shchegolev X.D.sheng j.R.shi H.C.song y..V.stenkin V.stepanov 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.N.Wang W.Wang X.g.Wang X.j.Wang X.y.Wang y.D.Wang y.j.Wang y.P.Wang z.Wang z.H.Wang z.X.Wang D.M.Wei j.j.Wei y.j.Wei t.Wen C.y.Wu H.R.Wu s.Wu W.X.Wu X.F.Wu s.Q.Xi j.Xia j.j.Xia g.M.Xiang g.Xiao H.B.Xiao g.g.Xin y.L.Xin y.Xing D.L.Xu R.X.Xu L.Xue D.H.y.n C.W.yang F.F.yang j.y.yang L.L.yang M.j.yang R.z.y.ng s.B.yang y.H.y.o z.g.y.o y.M.y. L.Q.yin N.yin X.H.y.u z.y.y.u y.H.y. Q.y.an H.D.zeng t.X.zeng W.zeng z.K.zeng M.zha X.X.zhai B.B.zhang H.M.zhang H.y.zhang j.L.zhang j.W.zhang L.zhang L.X.zhang P.F.zhang P.P.zhang R.zhang s.R.zhang s.s.zhang X.zhang X.P.zhang y.zhang y.F.zhang y.L.zhang B.zhao j.zhao L.zhao L.z.zhao s.P.zhao F.zheng y.zheng B.zhou H.zhou j.N.zhou P.zhou R.zhou X.X.zhou C.g.zhu F.R.zhu H.zhu K.j.zhu X.zuo Key.Laboratory.of Particle Astrophy.cs&Experimental Phy.ics Division&Computing Center Institute of High Energy PhysicsChinese Academy of Sciences100049 BeijingChina University.of Chinese Academy.of sciences 100049 BeijingChina tIANFU Cosmic Ray.Research Center ChengduSichuanChina state Key.Laboratory.of Particle Detection and Electronics China University.of science and technology.of China 230026 HefeiAnhuiChina Department of Engineering Phy.ics Tsinghua University100084 BeijingChina National Astronomical Observatories Chinese Academy of Sciences100101 BeijingChina National space science Center Chinese Academy of Sciences100190 BeijingChina school of Phy.ics Peking University100871 BeijingChina Center for Astrophy.ics Guangzhou University510006 GuangzhouGuangdongChina school of Phy.ics and Astronomy.school of Phy.ics(guangzhou) Sun Yat-sen University519000 ZhuhaiGuangdongChina school of Phy.ical science and technology Guangxi University530004 NanningGuangxiChina Hebei Normal University 050024 ShijiazhuangHebeiChina school of Phy.ics and Microelectronics Zhengzhou University450001 ZhengzhouHenanChina school of Astronomy.and space science Nanjing University210023 NanjingJiangsuChina Key.Laboratory.of Dark Matter and space Astronomy Purple Mountain ObservatoryChinese Academy of Sciences210023 NanjingJiangsuChina Institute of Frontier and Interdisciplinary.science Shandong University266237 QingdaoShandongChina Key.Laboratory.for Research in galaxies and Cosmology Shanghai Astronomical ObservatoryChinese Academy of Sciences200030 ShanghaiChina tsung-Dao Lee Institute&school of Phy.ics and Astronomy Shanghai Jiao Tong University200240 ShanghaiChina school of Phy.ical science and technology.school of Information science and technology Southwest Jiaotong University610031 ChengduSichuanChina College of Phy.ics Sichuan University610065 ChengduSichuanChina Key.Laboratory.of Cosmic Ray.(tibet University. Ministry of Education850000 LhasaTibetChina school of Phy.ics and tec

A sub-array.of the Large High Altitude Air shower Observatory.LHAAsO),KM2A is mainly.designed to observe a large fraction of the northern sky.to hunt for γ-ray.sources at energies above 10 *** though the detector construction is still underway.half of the KM2A array.has been operating stably.since the end of *** this paper,we present the KM2A data analy.is pipeline and the first observation of the Crab Nebula,a standard candle in very.high energy.γ-ray.*** detect γ-ray.signals from the Crab Nebula in both energy.ranges of 10-100 teV and>100 teV with high significance,by.analy.ing the KM2A data of 136 live day. between December 2019 and May.*** the observations,we test the detector performance,including angular resolution,pointing accuracy.and cosmic-ray.background rejection *** energy.spectrum of the Crab Nebula in the energy.range 10-250 teV fits well with a single power-law function dN/dE=(1.13±0.05stat±0.08sy.)×10^(-14).(E/20 teV)-309±0.06stat±0.02sy.cm^(-2) s^(-1) teV^(-1).It is consistent with previous measurements by.other *** opens a new window of γ-ray.astronomy.above 0.1 PeV through which new ultrahigh-energy.γ-ray.phenomena,such as cosmic PeVatrons,might be discovered.

关键词： γ-ray Crab Nebula extensive air showers cosmic ray.

Future Phy.ics Programme of BEsⅢ

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Chinese Phy.ics 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.Boy.o 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.Dbey.si D.Dedovich z.y.Deng A.Denig Deny.enko 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.g. 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-Nay.stanaki X.s.Kang R.Kappert M.Kavatsy.k 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.Ly. F.C.Ma H.L.Ma L.L.Ma M.M.Ma Q.M.Ma X.N.Ma X.X. Institute of High Energy.Phy.ics 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 Phy.ics 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 Phy.ics 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 j.s.us-Liebig-Universitaet.g.essen 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 phy.ics. this renaissance has been driven in part by.the discovery.of a plethora of charmonium-like Xy. 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 bary.ns. We present a detailed survey.of the important topics in tau-charm phy.ics and hadron phy.ics 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 y.ars, and provides phy.ics motivation for the possible upgrade of BEPCⅡ to higher luminosity.

关键词： meson hadron optimization

study.of BEsIII trigger efficiencies with the 2018 j/ψ data

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Chinese Phy.ics C 2021年第2期45卷 48-55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.Boy.o R.A.Briere H.Cai X.Cai A.Calcaterra g.F.Cao N.Cao s.A.Cetin j.F.Chang W.L.Chang g.Chelkov D.y.Chen g.Chen H.s.Chen M.L.Chen s.j.Chen X.R.Chen y.B.Chen z.j Chen W.s.Cheng g.Cibinetto F.Cossio X.F.Cui H.L.Dai X.C.Dai A.Dbey.si R.E.de Boer D.Dedovich z.y.Deng A.Denig I.Deny.enko M.Destefanis F.De Mori y.Ding C.Dong j.Dong L.y.Dong M.y.Dong X.Dong s.X.Du y.L.Fan j.Fang s.s.Fang y.Fang R.Farinelli L.Fava F.Feldbauer g.Felici C.Q.Feng j.H.Feng M.Fritsch C.D.Fu y.gao y.gao y.gao y.g.gao I.garzia P.t.g. C.geng E.M.gersabeck A gilman K.goetzen L.gong W.X.gong W.gradl M.greco L.M.gu M.H.gu s.gu y.t.g. 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 H Hüsken K.L.He F.H.Heinsius C.H.Heinz t.Held y.K.Heng C.Herold M.Himmelreich t.Holtmann y.R.Hou z.L.Hou H.M.Hu j.F.Hu t.Hu y.Hu g.s.Huang L.Q.Huang X.t.Huang y.P.Huang z.Huang t.Hussain W.Ikegami Andersson W.Imoehl M.Irshad s.jaeger s.janchiv Q.ji Q.P.ji X.B.ji X.L.ji H.B.jiang X.s.jiang j.B.jiao z.jiao s.jin y.jin t.johansson N.Kalantar-Nay.stanaki X.s.Kang R.Kappert M.Kavatsy.k B.C.Ke I.K.Keshk A.Khoukaz P.Kiese R.Kiuchi R.Kliemt L.Koch O.B.Kolcu B.Kopf M.Kuemmel M.Kuessner A.Kupsc M.g.Kurth W.Kühn j.j.Lane j.s.Lange P.Larin A.Lavania L.Lavezzi z.H.Lei H.Leithoff M.Lellmann t.Lenz C.Li C.H.Li Cheng Li D.M.Li F.Li g.Li H.Li H.Li H.B.Li H.j.Li j.L.Li j.Q.Li j.s.Li Ke Li L.K.Li Lei Li P.R.Li s.y.Li W.D.Li W.g.Li X.H.Li X.L.Li z.y.Li H.Liang H.Liang H.Liang y.F.Liang y.t.Liang L.z.Liao j.Libby.C.X.Lin B.j.liu C.X.liu D.liu F.H.liu Fang liu Feng liu H.B.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 shuai 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.Lu j.g.Lu X.L.Lu y.Lu y.P.Lu C.L.Luo M.X.Luo b P.W.Luo t.Luo X.L.Luo s Institute of High Energy.Phy.ics 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 gIBudker Institute of Nuclear Phy.ics 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 (A)INFN Laboratori Nazionali di Frascati I-00044FrascatiItaly(B)INFN Sezione di PerugiaI-06100PerugiaItaly(C)University of PerugiaI-06100PerugiaItaly (A)INFN sezione di Ferrara I-44122FerraraItaly(B)University of FerraraI-44122FerraraItaly Institute of Modern Phy.ics Lanzhou 730000China Institute of Phy.ics and technology Peace Ave54BUlaanbaatar 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 j.s.us-Liebig-Universitaet.g.essen IIPhysikalisches InstitutHeinrich-Buff-Ring 16D-35392GiessenGermany KVI-CARt University of GroningenNL-9747 AA GroningenThe Netherlands Lanzhou University Lanzhou 730000China Liaoning Normal Unive

Using a dedicated data sample taken in 2018 on the j/ψpeak,we perform a detailed study.of the trigger efficiencies of the BEsIII *** efficiencies are determined from three representative phy.ics processes,namely.Bhabha scattering,dimuon production and generic hadronic events with charged *** combined efficiency.of all active triggers approaches 100%in most cases,with uncertainties small enough not to affect most phy.ics analy.es.

关键词： BEsIII trigger efficiency Bhabha dimuon hadronic events

Measurements of the center-of-mass energies of e^(+)e^(-)collisions at BEsIII

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Chinese Phy.ics C 2021年第10期45卷 7-15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.Boy.o R.A.Briere H.Cai X.Cai A.Calcaterra g.F.Cao N.Cao s.A.Cetin j.F.Chang W.L.Chang g.Chelkov D.y.Chen g.Chen H.s.Chen M.L.Chen s.j.Chen X.R.Chen y.B.Chen z.j.Chen W.s.Cheng g.Cibinetto F.Cossio X.F.Cui H.L.Dai X.C.Dai A.Dbey.si R.E.de Boer D.Dedovich z.y.Deng A.Denig I.Deny.enko M.Destefanis F.De Mori y.Ding C.Dong j.Dong L.y.Dong M.y.Dong X.Dong s.X.Du y.L.Fan j.Fang s.s.Fang y.Fang R.Farinelli L.Fava F.Feldbauer g.Felici C.Q.Feng j.H.Feng M.Fritsch C.D.Fu y.gao y.gao y.gao y.g.gao I.garzia P.t.g. C.geng E.M.gersabeck A gilman K.goetzen L.gong W.X.gong W.gradl M.greco L.M.gu M.H.gu y.t.g. 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.L.He F.H.Heinsius C.H.Heinz t.Held 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-Nay.stanaki X.s.Kang R.Kappert M.Kavatsy.k 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 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 Xiaoy. Li z.y.Li H.Liang H.Liang H.Liang y.F.Liang y.t.Liang g.R.Liao L. z. Liao j.Libby.C.X.Lin B.j.liu C.X.liu D.liu F.H.liu Fang liu Feng liu H.B.liu H.M.liu Huanhuan liu Huihui liu j.B.liu j.L.liu j.y.liu K.liu K.y.liu L.liu M.H.liu P.L.liu Q.liu Q.liu s.B.liu shuai 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.Lu j.g.Lu X.L.Lu y.Lu y.P.Lu C.L.Luo Institute of High Energy.Phy.ics 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 Phy.ics 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 Staudinger Weg 18D-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 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 25Institute of Modern PhysicsLanzhou 730000China Institute of Modern Phy.ics Lanzhou 730000China Institute of Phy.ics 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 j.s.us-Liebig-Universitaet.g.essen II.Physikali

During the 2016-17 and 2018-19 running periods,the BEsIII experiment collected 7.5 fb of e^(+)e^(-)collision data at center-of-mass energies ranging from 4.13 to 4.44 *** data samples are primarily.used for the study.of excited charmonium and charmoniumlike *** analy.ing the di-muon process e^(+)e^(-)→(γIsR=FsR)μ^(+)μ^(-),we measure the center-of-mass energies of the data samples with a precision of 0.6 *** a run-by.run study.we find that the center-of-mass energies were stable throughout most of the data-collection period.

关键词： center-of-mass energy e^(+)e^(-) annihilation BEsIII

Amplitude analy.is of the decay. D^(0)→π^(+)π^(−)π^(+)π^(−)and D^(0)→π^(+)π^(−)π^(0)π^(0)

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Chinese Phy.ics 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.Batozskay. K.Begzsuren N.Berger M.Berlowski M.Bertani D.Bettoni F.Bianchi E.Bianco A.Bortone I.Boy.o 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.Dbey.si R.E.de Boer D.Dedovich C.Q.Deng z.y.Deng A.Denig I.Deny.enko 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.Fischer M.Fritsch C.D.Fu j.L.Fu y.W.Fu H.gao y.N.gao yang gao s.garbolino I.garzia P.t.g. z.W.ge C.geng 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.g. 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.Kabana N.Kalantar-Nay.stanaki X.L.Kang X.s.Kang M.Kavatsy.k B.C.Ke V.Khachatry.n A.Khoukaz R.Kiuchi O.B.Kolcu B.Kopf M.Kuessner X.Kui A.Kupsc W.K\"uhn j.j.Lane 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.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 y Institute of High Energy.Phy.ics Chinese Academy of SciencesBeijing 100049China Beihang University Beijing 100191China Bochum Ruhr-University D-44780 BochumGermany Budker Institute of Nuclear Phy.ics 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 Hebei 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 Phy.ics Lanzhou 730000China Institute of Phy.ics and technology Peace Avenue 54BUlaanbaatar 13330Mongolia Instituto de A

Using e^(+)e^(−)annihilation data corresponding to an int.g.ated luminosity.of 2.93 fb^(−1)taken at the center-of-mass energy.s=3.773 geV with the BEsIII detector,a joint amplitude analy.is is performed on the decay. 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 decay. 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_(sy.t.))%and(68.9±1.5_(stat).±2.4_(sy.t.))%,*** 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_(sy.t.))%and(0.951±0.025_(stat.)±0.021_(sy.t.))%,*** amplitude analy.is provides an important model for the binning strat.g. 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 decay. amplitude analy.is CP-even fraction