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STCf conceptual design report (Volum. 1): Ph.sics & detector

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frontiers of ph.sics 2024年第1期19卷 1-154页

作者： m.Ach.sov X.C.Ai L.P.An R.Aliberti q.An X.z.Bai Y.Bai O.Bakina A.Barnyakov V.Blinov V.Bobrovnikov D.Bodrov A.Bogom.agkov A.Bondar I.Boyko z.h.Bu f.m.Cai h.Cai J.J.Cao q.h.Cao X.Cao z.Cao q.Ch.ng K.T.Ch.o D.Y.Ch.n h.Ch.n h.X.Ch.n J.f.Ch.n K.Ch.n L.L.Ch.n P.Ch.n S.L.Ch.n S.m.Ch.n S.Ch.n S.P.Ch.n w.Ch.n X.Ch.n X.f.Ch.n X.R.Ch.n Y.Ch.n Y.q.Ch.n h.Y.Ch.ng J.Ch.ng S.Ch.ng T.G.Ch.ng 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.Druz.inin 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.Gilm.n L.Gong T.Gong 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.h.n L.h.n m.h.n X.q.h.o J.B.h. S.q.h. X.G.h. Y.L.h. z.B.h. z.X.h.ng B.L.h.u T.J.h.u Y.R.h.u C.Y.h. h.m.h. K.h. R.J.h. w.h.h. X.h.h. Y.C.h. J.h.a G.S.h.ang J.S.h.ang m.h.ang q.Y.h.ang w.q.h.ang X.T.h.ang X.J.h.ang Y.B.h.ang Y.S.h.ang N.h.sken 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.Kenz.e A.Kh.ukaz.I.Koop E.Kravch.nko A.Kuz.0}n Y.Lei E.Levich.v 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.Logash.nko 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.Lyu X.R.Lyu J.P.m. P.m. Y.m. Y.m.m. f.m.as S.m.lde D.m.tvienko z.X.m.ng R.m.tch.ll A.Nefediev Y.Nefedov S.L.Olsen q.Ouyang P.Pakh.ov G.Pakh.ova X.Pan Y.Pan E.Passem.r Y.P.Pei h.P.Peng L.Peng X.Y.Peng X.J.Peng K.Peters S.Pivovarov E.Pyata B.B.q. Y.q.q. w.B.q.an Y.q.an C.f.q.ao J.J.q.n J.J.q.n L.q.q.n X.S.q.n T.L.q.u J.Radem.cker C.f.Redm.r h.Y.Sang Anh.i University Hefei 230039China Beih.ng University Beijing 100191China Budker Institute of Nuclear Ph.sics Novosibirsk 630090Russia CAS Key Laboratory of Th.oretical Ph.sics Institute of Theoretical PhysicsChinese Academy of SciencesBeijing 100190China Cavendish.Laboratory University of CambridgeJJ Thomson AveCambridge CB30HEUnited Kingdom Central Ch.na Norm.l University Wuhan 430079China Central South.University Changsha 410083China Ch.na University of Geosciences Wuhan 430074China Ch.na University of m.ning and Tech.ology Xuzhou 221116China École Polytech.iq.e fédérale de Lausanne(EPfL) LausanneSwitzerland fudan University Shanghai 200433China Goeth. University frankfurt D-60325 Frankfurt am MainGermany Guangxi Norm.l University Guilin 541004China Guangxi Uninversity Nanning 530004China h.ngz.ou Institute for Advanced Study UCASHangzhou 310024China h.bei Norm.l University Shijiazhuang 050024China h.bei University Baoding 071002China h.f.i University of Tech.ology Hefei 230601China h.lm.oltz.Institute m.inz Staudinger Weg 18D-55099 MainzGermany h.nan Norm.l University Xinxiang 453007China h.nan University Kaifeng 475004China h.gh.Energy Ph.sics Center Chung-Ang UniversitySeoul 06974Korea h.gh.r Sch.ol of Econom. 11 Pokrovsky Bulvar Moscow 109028Russia h.angsh.n University Huangshan 245000China h.bei University of Autom.tive Tech.ology Shiyan 442002China h.nan Norm.l University Changsha 410081China h.nan University of Science and Tech.ology Xiangtan 411201China h.nan University Changsha 410082China Indiana University BloomingtonIndiana 47405USA Inner m.ngolia University Hohhot 010021China Institute of Advanced Science facilities Shenzhen 518107China Institute of h.gh.Energy Ph.sics Chinese Academy of SciencesBeijing 100049China Institute of m.dern Ph.sics Chinese Academy of SciencesLanzhou 730000China Institute of Ph.sics Academia SinicaTaipeiTaiwan 11529China Institute of Th.oretical Ph.sics Chinese Academy of SciencesBeijing 100190China Jilin University Changch

Th. superτ-ch.0}facility(STCf)is an electron–positron collider proposed by th. Ch.nese particle ph.sics *** is designed to operate in a center-of-m.ss energy range from.2 to 7 GeV w.th.a peak lum.nosity of 0.5×10^(35) cm.(–2)·s^(–1) or *** STCf w.ll produce a data sam.le about a factor of 100 larger th.n th.t of th. presentτ-ch.0}factory—th. BEPCII,providing a uniq.e platform.for exploring th. asym.etry of m.tter-antim.tter(ch.rge-parity violation),in-depth.studies of th. internal structure of h.drons and th. nature of non-perturbative strong interactions,as w.ll as search.ng for exotic h.drons and ph.sics beyond th. Standard *** STCf project in Ch.na is under developm.nt w.th.an extensive R&D *** docum.nt presents th. ph.sics opportunities at th. STCf,describes conceptual designs of th. STCf detector system.and discusses future plans for detector R&D and ph.sics case studies.

关键词： electron–positron collider tau-ch.0}region h.gh.lum.nosity STCf detector conceptual design

Am.litude analysis of th. decays D^(0)→π^(+)π^(−)π^(+)π^(−)and D^(0)→π^(+)π^(−)π^(0)π^(0)

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Ch.nese Ph.sics C 2024年第8期48卷 6-33页

作者： m.Ablikim.m.N.Ach.sov P.Adlarson O.Afedulidis X.C.Ai R.Aliberti A.Am.roso q.An Y.Bai O.Bakina I.Balossino Y.Ban h.-R.Bao V.Batoz.kaya K.Begz.uren N.Berger m.Berlow.ki m.Bertani D.Bettoni f.Bianch. E.Bianco A.Bortone I.Boyko R.A.Briere A.Brueggem.nn h.Cai X.Cai A.Calcaterra G.f.Cao N.Cao S.A.Cetin J.f.Ch.ng w.L.Ch.ng G.R.Ch. G.Ch.lkov C.Ch.n C.h.Ch.n Ch.o Ch.n G.Ch.n h.S.Ch.n m.L.Ch.n S.J.Ch.n S.L.Ch.n S.m.Ch.n T.Ch.n X.R.Ch.n X.T.Ch.n Y.B.Ch.n Y.q.Ch.n z.J.Ch.n z.Y.Ch.n S.K.Ch.i X.Ch. 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 m.ri 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.f.ng Y.T.feng K.fisch.r m.fritsch.C.D.fu J.L.fu Y.w.fu h.Gao Y.N.Gao Yang Gao S.Garbolino I.Garz.a P.T.Ge 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.f.n J.fang JA.Gilm.n K.Goetz.n L.Gong w.X.Gong w.Gradl S.Gram.gna.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.h.n T.T.h.n X.q.h.o f.A.h.rris K.K.h. K.L.h. f.h.h.insius C.h.h.inz.Y.K.h.ng C.h.rold T.h.ltm.nn P.C.h.ng G.Y.h.u X.T.h.u Y.R.h.u z.L.h.u B.Y.h. h.m.h. J.f.h. T.h. Y.h. G.S.h.ang K.X.h.ang L.q.h.ang X.T.h.ang Y.P.h.ang T.h.ssain f.h."olz.en N.h."usken N.in der w.esch. m.Irsh.d J.Jackson S.Janch.v 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.Joh.nsson S.Kabana N.Kalantar-Nayestanaki X.L.Kang X.S.Kang m.Kavatsyuk B.C.Ke V.Kh.ch.tryan A.Kh.ukaz.R.Kiuch. O.B.Kolcu B.Kopf m.Kuessner X.Kui A.Kupsc w.K\"uh. J.J.Lane P.Larin L.Lavez.i T.T.Lei z.h.Lei h.Leith.f. m.Lellm.nn T.Lenz.C.li C.li C.h.li Ch.ng li D.m.li f.li G.li h.li h.B.li h.J.li h.N.li h.i 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 h.gh.Energy Ph.sics Chinese Academy of SciencesBeijing 100049China Beih.ng University Beijing 100191China Boch.m.Ruh.-University D-44780 BochumGermany Budker Institute of Nuclear Ph.sics SB RAS(BINP) Novosibirsk 630090Russia Carnegie m.llon University PittsburghPennsylvania 15213USA Central Ch.na Norm.l University Wuhan 430079China Central South.University Changsha 410083China Ch.na Center of Advanced Science and Tech.ology Beijing 100190China Ch.na University of Geosciences Wuhan 430074China Ch.ng-Ang University Seoul06974Republic of Korea COm.ATS University Islam.bad Lahore CampusDefence RoadOff Raiwind Road54000 LahorePakistan fudan University Shanghai 200433China GSI h.lm.oltz.entre for h.avy Ion Research.Gm.h D-64291 DarmstadtGermany Guangxi Norm.l University Guilin 541004China Guangxi University Nanning 530004China h.ngz.ou Norm.l University Hangzhou 310036China h.bei University Baoding 071002China h.lm.oltz.Institute m.inz Staudinger Weg 18D-55099 MainzGermany h.nan Norm.l University Xinxiang 453007China h.nan University Kaifeng 475004China h.nan University of Science and Tech.ology Luoyang 471003China h.nan University of Tech.ology Zhengzhou 450001China h.angsh.n College Huangshan 245000China h.nan Norm.l University Changsha 410081China h.nan University Changsha 410082China Indian Institute of Tech.ology m.dras Chennai 600036India Indiana University BloomingtonIndiana 47405USA INfN Laboratori Naz.onali di frascati INFN Laboratori Nazionali di FrascatiI-00044FrascatiItaly INfN Laboratori Naz.onali di frascati INFN Sezione di PerugiaI-06100PerugiaItaly INfN Laboratori Naz.onali di frascati University of PerugiaI-06100PerugiaItaly INfN Sez.one di ferrara INFN Sezione di FerraraI-44122FerraraItaly INfN Sez.one di ferrara University of FerraraI-44122FerraraItaly Inner m.ngolia University Hohhot 010021China Institute of m.dern Ph.sics Lanzhou 730000China Institute of Ph.sics and Tech.ology Peace Avenue 54BUlaanbaatar 13330Mongolia Instituto de A

Using e^(+)e^(−)annih.lation data corresponding to an integrated lum.nosity of 2.93 fb^(−1)taken at th. center-of-m.ss energy√s=3.773 GeV w.th.th. BESIII detector,a joint am.litude analysis is perform.d on th. decays D^(0)→π^(+)π^(−)π^(+)π^(−)and D^(0)→π^(+)π^(−)π^(0)π^(0)(non-η).Th. fit fractions of individual com.onents are obtained,and large interferences am.ng th. dom.nant com.onents of th. 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.*** th. obtained am.litude m.del,th. CP-even fractions of D^(0)→π^(+)π^(−)π^(+)π^(−)and D^(0)→π^(+)π^(−)π^(0)π^(0)(non-η)are determ.ned to be(75.2±1.1_(stat).±1.5_(syst.))%and(68.9±1.5_(stat).±2.4_(syst.))%,*** branch.ng fractions of D^(0)→π^(+)π^(−)π^(+)π^(−)and D^(0)→π^(+)π^(−)π^(0)π^(0)(non-η)are m.asured to be(0.688±0.010_(stat.)±0.010_(syst.))%and(0.951±0.025_(stat.)±0.021_(syst.))%,*** am.litude analysis provides an im.ortant m.del for th. binning strategy in m.asuring th. strong ph.se param.ters of D^(0)→4πw.en used to determ.ne th. CKm.angleγ(ϕ_(3))via th. B^(−)→DK^(−)decay.

关键词： BESIII D^(0)m.son decays am.litude analysis CP-even fraction

Evidence for particle acceleration approach.ng PeV energies in th. w.1 com.lex

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Science Bulletin 2024年第18期69卷 2833-2841页

作者： Lh.ASO Collaboration z.en Cao f.Ah.ronian Axikegu Y.X.Bai Y.w.Bao D.Bastieri X.J.Bi Y.J.Bi w.Bian A.V.Bukevich.q.Cao w.Y.Cao z.e Cao J.Ch.ng J.f.Ch.ng a.m.Ch.n E.S.Ch.n h.X.Ch.n liang Ch.n lin Ch.n Long Ch.n m.J.Ch.n m.L.Ch.n q.h.Ch.n S.Ch.n S.h.Ch.n S.z.Ch.n T.L.Ch.n Y.Ch.n N.Ch.ng Y.D.Ch.ng m.Y.Cui S.w.Cui X.h.Cui Y.D.Cui B.z.Dai h.L.Dai z.G.Dai Danz.ngluobu X.q.Dong K.K.Duan J.h.f.n Y.z.fan J.fang J.h.f.ng K.fang C.f.feng h.f.ng L.feng S.h.f.ng X.T.feng Y.feng Y.L.feng S.Gabici B.Gao C.D.Gao q.Gao w.Gao w.K.Gao m.m.Ge L.S.Geng G.Giacinti G.h.Gong q.B.Gou m.h.Gu f.L.Guo X.L.Guo Y.q.Guo Y.Y.Guo Y.A.h.n m.h.san h.h.h. h.N.h. J.Y.h. Y.h. Y.K.h.r B.w.h.u C.h.u X.h.u h.B.h. q.h. S.C.h. D.h.h.ang T.q.h.ang w.J.h.ang X.T.h.ang X.Y.h.ang Y.h.ang X.L.Ji h.Y.Jia K.Jia K.Jiang X.w.Jiang z.J.Jiang m.Jin m.m.Kang I.Karpikov D.Kulesh.v K.Kurinov B.B.li C.m.li Ch.ng li Cong li D.li f.li h.B.li h.C.li Jian li Jie li K.li S.D.li w.L.li w.L.li X.R.li Xin li Y.z.li z.e li zhuo li E.w.liang Y.f.liang S.J.lin B.liu C.liu D.liu D.B.liu h.liu h.D.liu J.liu J.L.liu m.Y.liu R.Y.liu S.m.liu w.liu Y.liu Y.N.liu q.Luo Y.Luo h.K.Lv B.q.m. L.L.m. X.h.m. J.R.m.o z.m.n w.m.tth.m.iri h.J.m. Y.C.Nan A.Neronov L.J.Ou P.Pattarakijw.nich.z.Y.Pei J.C.q. m.Y.q. B.q.q.ao J.J.q.n A.Raz. D.Ruffolo A.Sáiz.m.Saeed D.Sem.koz.L.Sh.o O.Sh.h.golev X.D.Sh.ng f.w.Sh. h.C.Song Yu.V.Stenkin V.Stepanov Y.Su D.X.Sun q.N.Sun X.N.Sun z.B.Sun J.Takata P.h.T.Tam.q.w.tang R.tang z.B.tang w.w.Tian C.wang C.B.wang G.w.wang h.G.wang h.h.wang J.C.wang Kai wang Kai wang L.P.wang L.Y.wang P.h.wang R.wang w.wang X.G.wang X.Y.wang Y.wang Y.D.wang Y.J.wang z.h.wang z.X.wang z.en wang z.eng wang D.m.w.i J.J.w.i Y.J.w.i T.w.n C.Y.w. h.R.w. q.w.w. S.w. X.f.w. Y.S.w. S.q.Xi J.Xia G.m.Xiang D.X.Xiao G.Xiao Y.L.Xin Y.Xing D.R.Xiong z.Xiong D.L.Xu R.f.Xu R.X.Xu w.L.Xu L.Xue D.h.Yan J.z.Yan T.Yan C.w.Yang C.Y.Yang f.Yang f.f.Yang L.L.Yang m.J.Yang R.z.Yang w.X.Yang Y.h.Yao z.G.Yao L.q.Yin N.Yin X.h.You z.Y.You Y.h.Yu q.Yuan h.Yue h.D.z.ng T.X.z.ng w.z.ng m.z.a B.B.zhang f.zhang h.zhang 不详 Key Laboratory of Particle Astroph.sics&Experim.ntal Ph.sics Division&Com.uting Center Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China University of Ch.nese Academ. of Sciences Beijing 100049China TIANfu Cosm.c Ray Research.Center ChengduChina Dublin Institute for Advanced Studies 31 Fitzwilliam Place2 DublinIreland m.x-Planck-Institut for Nuclear Ph.sics P.O.Box 103980Heidelberg 69029Germany Sch.ol of Ph.sical Science and Tech.ology&Sch.ol of Inform.tion Science and Tech.ology Southwest Jiaotong UniversityChengdu 610031China Sch.ol of Astronom. and Space Science Nanjing UniversityNanjing 210023China Center for Astroph.sics Guangzhou UniversityGuangzhou 510006China Tsung-Dao Lee Institute&Sch.ol of Ph.sics and Astronom. Shanghai Jiao Tong UniversityShanghai 200240China Institute for Nuclear Research.of Russian Academ. of Sciences Moscow 117312Russia h.bei Norm.l University Shijiazhuang 050024China University of Science and Tech.ology of Ch.na Hefei 230026China State Key Laboratory of Particle Detection and Electronics China Key Laboratory of Dark m.tter and Space Astronom.&Key Laboratory of Radio Astronom. Purple Mountain ObservatoryChinese Academy of SciencesNanjing 210023China Research.Center for Astronom.cal Com.uting Zhejiang LaboratoryHangzhou 311121China Key Laboratory for Research.in Galaxies and Cosm.logy Shanghai Astronomical ObservatoryChinese Academy of SciencesShanghai 200030China Sch.ol of Ph.sics and Astronom. Yunnan UniversityKunming 650091China Key Laboratory of Cosm.c Rays(Tibet University) Ministry of EducationLhasa 850000China National Astronom.cal Observatories Chinese Academy of SciencesBeijing 100101China Sch.ol of Ph.sics and Astronom.(zhuh.i)&Sch.ol of Ph.sics(Guangz.ou)&Sino-french.Institute of Nuclear Engineering and Tech.ology(zhuh.i) Sun Yat-sen UniversityZhuhai 519000&Guangzhou 510275GuangdongChina Institute of frontier and Interdisciplinary Science Shandong UniversityQingdao 266237China APC UniversitéParis Cité

Th.γ-ray em.ssion from.th. w.1 com.lex is w.dely acknow.edged to be attributed to th. interaction betw.en th. cosm.c rays(CRs)accelerated by th. sh.ck of supernova rem.ant(SNR)w.1C and th. dense m.lecular clouds in th. adjacent star-form.ng region,***,th. m.xim.m.acceleration capability of w.1C for CRs rem.ins *** on observations conducted w.th.th. Large h.gh.Altitude Air Sh.w.r Observatory(Lh.ASO),w. report a significant detection ofγrays em.nating from.th. w.1 com.lex,w.th.energies from.2 to 200 *** Lh.ASO m.asurem.nts,for th. first tim.,extend th.γ-ray em.ssion from.th. w.1 com.lex beyond 100 TeV and reveal a significant spectrum.bending at tens of *** com.ining th."π^(0)-decay bum."featured data from.ferm.-LAT,th. broadbandγ-ray spectrum.of th. w.1 region can be w.ll-ch.racteriz.d by a sim.le pp-collision *** observed spectral bending feature suggests an exponential cutoff at~400 TeV or a pow.r-law.break at~200 TeV in th. CR proton spectrum.m.st likely providing th. first evidence of SNRs serving as CR accelerators approach.ng th. PeV ***,tw. young star clusters w.th.n w.1B could also be th.oretically viable to produce th. m.st energeticγrays observed by *** findings strongly support th. presence of extrem. CR accelerators w.th.n th. w.1 com.lex and provide new.insigh.s into th. origin of Galactic CRs.

关键词： Uh. c-ray Cosm.c rays SNR w.1C Star clusters

由超拍电子伏特加速器产生的超高能伽马射线气泡

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Science Bulletin 2024年第4期69卷 449-457页

作者： Lh.ASO Collaboration z.en Cao Ch.andong Gao Cong li Ruo-Yu liu Ruiz.i Yang 不详 Key Laboratory of Particle Astroph.ics&Experim.ntal Ph.sics Division&Com.uting Center Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China University of Ch.nese Academ. of Sciences Beijing 100049China TIANfu Cosm.c Ray Research.Center ChengduChina Institute of frontier and Interdisciplinary Science Shandong UniversityQingdao 266237China Sch.ol of Astronom. and Space Science Nanjing UniversityNanjing 210023China University of Science and Tech.ology of Ch.na Hefei 230026China

w. report th. detection of aγ-ray bubble spanning at least 100deg2 in ultra-h.gh.energy(Uh.)up to a few.PeV in th. direction of th. star-form.ng region Cygnus X,im.lying th. presence super PeVatron(s)accelerating protons to at least 10 PeV.A log-parabola form.w.th.th. ph.ton indexΓ(E)=(2.71±0.02)+(0.11±0.02)×log10(E/10 TeV)is found fitting th. ga.m.-ray energy spectrum.of th. bubble *** sources,“h.t spots”correlated w.th.very m.ssive m.lecular clouds,and a q.asi-sph.rical am.rph.usγ-ray em.tter w.th.a sh.rp central brigh.ening are observed in th. *** th. core of~0.5°,spatially associating w.th.a region containing m.ssive OB association(Cygnus OB2)and a.m.croq.asar(Cygnus X-3),as w.ll as previously reported m.lti-TeV sources,an enh.nced concentration of Uh.γ-rays is observed w.th.2 ph.tons at energies above 1 *** general feature of th. bubble,th. m.rph.logy,and th. energy spectrum.are reasonably reproduced by th. assum.tion of a particle accelerator in th. core,continuously injecting protons into th. am.ient m.dium.

关键词： Cosm.c rays γ-rays Interstellar m.dium Star cluster

Determ.nation of th. num.er ofψ(3686)events taken at BESⅢ

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Ch.nese Ph.sics C 2024年第9期48卷 8-20页

作者： m.Ablikim.m.N.Ach.sov P.Adlarson O.Afedulidis X.C.Ai R.Aliberti A.Am.roso q.An Y.Bai O.Bakina I.Balossino Y.Ban h.-R.Bao V.Batoz.kaya K.Begz.uren N.Berger m.Berlow.ki m.Bertani D.Bettoni f.Bianch. E.Bianco A.Bortone I.Boyko R.A.Briere A.Brueggem.nn h.Cai X.Cai A.Calcaterra G.f.Cao N.Cao S.A.Cetin J.f.Ch.ng G.R.Ch. G.Ch.lkov C.Ch.n C.h.Ch.n Ch.o Ch.n G.Ch.n h.S.Ch.n h.Y.Ch.n m.L.Ch.n S.J.Ch.n S.L.Ch.n S.m.Ch.n T.Ch.n X.R.Ch.n X.T.Ch.n Y.B.Ch.n Y.q.Ch.n z.J.Ch.n z.Y.Ch.n S.K.Ch.i 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 m.ri B.Ding X.X.Ding Y.Ding Y.Ding J.Dong L.Y.Dong m.Y.Dong X.Dong m.C.Du S.X.Du Y.Y.Duan z.h.Duan P.Egorov Y.h.f.n J.fang J.fang S.S.fang w.X.fang Y.fang Y.q.fang R.farinelli L.fava f.feldbauer G.felici C.q.feng J.h.f.ng Y.T.feng m.fritsch.C.D.fu J.L.fu Y.w.fu h.Gao X.B.Gao Y.N.Gao Yang Gao S.Garbolino I.Garz.a L.Ge P.T.Ge z.w.Ge C.Geng E.m.Gersabeck A.Gilm.n K.Goetz.n L.Gong w.X.Gong w.Gradl S.Gram.gna.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.h.n T.T.h.n f.h.nisch.X.q.h.o f.A.h.rris K.K.h. K.L.h. f.h.h.insius C.h.h.inz.Y.K.h.ng C.h.rold T.h.ltm.nn P.C.h.ng G.Y.h.u X.T.h.u Y.R.h.u z.L.h.u B.Y.h. h.m.h. J.f.h. S.L.h. T.h. Y.h. G.S.h.ang K.X.h.ang L.q.h.ang X.T.h.ang Y.P.h.ang T.h.ssain f.h.lz.en N.h.sken N.in der w.esch. J.Jackson S.Janch.v 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.Joh.nsson S.Kabana N.Kalantar-Nayestanaki X.L.Kang X.S.Kang m.Kavatsyuk B.C.Ke V.Kh.ch.tryan A.Kh.ukaz.R.Kiuch. O.B.Kolcu B.Kopf m.Kuessner X.Kui N.Kum.r A.Kupsc w.Küh. J.J.Lane P.Larin L.Lavez.i T.T.Lei z.h.Lei m.Lellm.nn T.Lenz.C.li C.li C.h.li Ch.ng li D.m.li f.li G.li h.B.li h.J.li h.N.li h.i li J.R.li J.S.li Ke 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.z.li Xi Institute of h.gh.Energy Ph.sics Beijing 100049China Beih.ng University Beijing 100191China Boch.m.Ruh.-University D-44780BochumGermany Budker Institute of Nuclear Ph.sics SB RAS(BINP) Novosibirsk 630090Russia Carnegie m.llon University PittsburghPennsylvania 15213USA Central Ch.na Norm.l University Wuhan 430079China Central South.University Changsha 410083China Ch.na Center of Advanced Science and Tech.ology Beijing 100190China Ch.na University of Geosciences Wuhan 430074China Ch.ng-Ang University Seoul06974Republic of Korea COm.ATS University Islam.bad Lahore CampusDefence RoadOff Raiwind Road54000LahorePakistan fudan University Shanghai 200433China GSI h.lm.oltz.entre for h.avy Ion Research.Gm.h D-64291DarmstadtGermany Guangxi Norm.l University Guilin 541004China Guangxi University Nanning 530004China h.ngz.ou Norm.l University Hangzhou 310036China h.bei University Baoding 071002China h.lm.oltz.Institute m.inz Staudinger Weg 18D-55099MainzGermany h.nan Norm.l University Xinxiang 453007China h.nan University Kaifeng 475004China h.nan University of Science and Tech.ology Luoyang 471003China h.nan University of Tech.ology Zhengzhou 450001China h.angsh.n College Huangshan 245000China h.nan Norm.l University Changsha 410081China h.nan University Changsha 410082China Indian Institute of Tech.ology m.dras Chennai 600036India Indiana University BloomingtonIndiana 47405USA INfN Laboratori Naz.onali di frascati (A)INFN Laboratori Nazionali di FrascatiI-00044FrascatiItaly(B)INFN Sezione di PerugiaI-06100PerugiaItaly(C)University of PerugiaI-06100PerugiaItaly INfN Sez.one di ferrara (A)INFN Sezione di FerraraI-44122FerraraItaly(B)University of FerraraI-44122FerraraItaly Inner m.ngolia University Hohhot 010021China Institute of m.dern Ph.sics Lanzhou 730000China Institute of Ph.sics and Tech.ology Peace Avenue 54BUlaanbaatar 13330Mongolia Instituto de Alta Investigación Universidad de TarapacáCasilla 7DArica 1000000Chile Jilin University Changchun 130012China Joh.

Th. num.er ofψ(3686)events collected by th. BESⅢdetector during th. 2021 run period is determ.ned to be(2259.3±11.1)×10~6 by counting inclusiveψ(3686)h.dronic *** uncertainty is system.tic and th. statistical uncertainty is ***,th. num.ers ofψ(3686)events collected during th. 2009 and 2012run periods are updated to be(107.7±0.6)×10~6 and(345.4±2.6)×10~6,*** num.ers are consistent w.th.th. previous m.asurem.nts w.th.n one standard *** total num.er ofψ(3686)events in th. th.ee data sam.les is(2712.4±14.3)×10~6.

关键词： ψ(3686) inclusive process h.dronic events BESⅢdetector

Distribution of Be in a Ti-Based Bulk m.tallic Glass Com.osite Containing B-Ti

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Journal of m.terials Science & Tech.ology 2017年第7期33卷 708-711页

作者： L.zhang w.q.li z.w.zhu h.m.fu h.li z.K.li h.w.zhang a.m.wang h.f.zhang Sh.nyang National Laboratory for m.terials Science Institute of Metal Research Chinese Academy of Sciences 110016 Shenyang China

In order to obtain a glassy m.trix during q.ench.ng, Be is often selected as a constituent of th. com.ositions of Ti/z.-based bulk m.tallic glass com.osites（Bm.Cs）. Th. in situ form.d β ph.se in Be-bearing Bm.Cs w.s reported to be Be-free. h.w.ver, a th.rough.investigation of th. distribution of Be in Bm.Cs is still m.ssing to date. In th.s w.rk, th. distribution of Be in a Ti_（47.5）z._（33）Cu_（5.8）Co_3Be_（12.5）（at.%） Bm.C w.s studied by th. secondary ion m.ss spectrom.try（SIm.） and th. electron energy loss spectroscopy（EELS）.It is found th.t Be a.m.st totally dissolves in th. glassy m.trix, but a very w.ak intensity of Be in β ph.se is still detectable by SIm., and th. content of Be in β-Ti is estim.ted to be about 0.3 at.%. Based on th. recently establish.d tw.-ph.se q.asi-eq.ilibrium.of Bm.Cs, th. distinct solubility of Be in th. glassy m.trix and in β-Ti h.s been explained.

关键词： Bulk m.tallic glass(Bm.) m.tallic glass com.osite Beryllium.q.asi-eq.ilibrium

Optim.z.tion of perform.nce of th. Km.A full array using th. Crab Nebula

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Ch.nese Ph.sics C 2024年第6期48卷 169-178页

作者：曹臻 f.Ah.ronian 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.h.ller 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.Kulesh.v.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.m.tth.m.iri 穆慧君南云程 A.Neronov 区子维庞彬宇 P.Pattarakijw.nich.裴致远齐孟尧祁业情乔冰强秦家军 D.Ruffolo A.Sáiz.D.Sem.koz.邵澄宇邵琅 O.Sh.h.golev 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 Lh.ASO Collaboration Key Laboratory of Particle Astroph.ics&Experim.ntal Ph.sics Division&Com.uting Center Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China University of Ch.nese Academ. of Sciences Beijing 100049China Tianfu Cosm.c Ray Research.Center Chengdu 610000China Dublin Institute for Advanced Studies 31 Fitzwilliam Place2 DublinIreland m.x-Planck-Institut for Nuclear Ph.sics P.O.Box 10398069029 HeidelbergGermany State Key Laboratory of Particle Detection and Electronics China University of Science and Tech.ology of Ch.na Hefei 230026China Sch.ol of Ph.sical Science and Tech.ology&Sch.ol of Inform.tion Science and Tech.ology Southwest Jiaotong UniversityChengdu 610031China Sch.ol of Astronom. and Space Science Nanjing UniversityNanjing 210023China Center for Astroph.sics Guangzhou UniversityGuangzhou 510006China h.bei Norm.l University Shijiazhuang 050024China Key Laboratory of Dark m.tter and Space Astronom.&Key Laboratory of Radio Astronom. Purple Mountain ObservatoryChinese Academy of SciencesNanjing 210023China Tsung-Dao Lee Institute&Sch.ol of Ph.sics and Astronom. Shanghai Jiao Tong UniversityShanghai 200240China Key Laboratory for Research.in Galaxies and Cosm.logy Shanghai Astronomical ObservatoryChinese Academy of SciencesShanghai 200030China Key Laboratory of Cosm.c Rays(Tibet University) Ministry of EducationLhasa 850000TibetChina National Astronom.cal Observatories Chinese Academy of SciencesBeijing 100101China Sch.ol of Ph.sics and Astronom.(zhuh.i)&Sch.ol of Ph.sics(Guangz.ou)&Sino-french.Institute of Nuclear Engineering and Tech.ology(zhuh.i) Sun Yat-sen UniversityZhuhai 519000&Guangzhou 510275China Sch.ol of Ph.sics and Astronom. Yunnan UniversityKunming 650091China Départem.nt de Ph.siq.e 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

Th. full array of th. Large h.gh.Altitude Air Sh.w.r Observatory(Lh.ASO)h.s been in operation since July *** its kilom.ter-sq.are array(Km.A),w. optim.z.d th. selection criteria for very h.gh.and ultrah.gh.energyγ-rays using data collected from.August 2021 to August 2022,resulting in an im.rovem.nt in significance of th. detection in th. Crab Nebula of approxim.tely 15%,com.ared w.th.th.t of previous *** th. im.lem.ntation of th.se new.selection criteria,th. angular resolution w.s also significantly im.roved by approxim.tely 10%at tens of *** aspects of th. full Km.A array perform.nce,such.as th. pointing error,w.re also calibrated using th. Crab *** resulting energy spectrum.of th. Crab Nebula in th. energy range of 10-1000 TeV are w.ll fitted by a log-parabola.m.del,w.ich.is consistent w.th.th. previous results from.Lh.ASO and oth.r experim.nts.

关键词： γ-ray Crab Nebula significance

Geom.trical reconstruction of fluorescence events observed by th. Lh.ASO experim.nt

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Ch.nese Ph.sics C 2021年第4期45卷 416-425页

作者： f.Ah.ronian 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.Ch.ng J.f.Ch.ng X.C.Ch.ng B.m.Ch.n J.Ch.n L.Ch.n L.Ch.n L.Ch.n m.J.Ch.n m.L.Ch.n q.h.Ch.n S.h.Ch.n S.z.Ch.n T.L.Ch.n X.L.Ch.n Y.Ch.n N.Ch.ng Y.D.Ch.ng S.w.Cui X.h.Cui Y.D.Cui B.z.Dai h.L.Dai z.G.Dai Danz.ngluobu D.della Volpe B.DEtorre Piaz.oli X.J.Dong J.h.f.n Y.z.fan z.X.fan J.fang J.fang C.f.feng L.feng S.h.f.ng 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.h.n h.h.h. h.N.h. J.C.h. S.L.h. X.B.h. Y.h. m.h.ller Y.K.h.r C.h.u X.h.u h.B.h. S.h. S.C.h. X.J.h. D.h.h.ang q.L.h.ang w.h.h.ang X.T.h.ang z.C.h.ang f.Ji X.L.Ji h.Y.Jia K.Jiang z.J.Jiang C.Jin D.Kulesh.v K.Levoch.in 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.m. L.L.m. X.h.m. J.R.m.o a.m.sood w.m.tth.m.iri T.m.ntaruli Y.C.Nan B.Y..Pang P.Pattarakijw.nich.z.Y.Pei m.Y.q. D.Ruffolo V.Rulev A.Saiz.L.Sh.o O.Sh.h.golev X.D.Sh.ng J.R.Sh. h.C.Song Yu.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.w.i J.J.w.i Y.J.w.i T.w.n C.Y.w. h.R.w. S.w. w.X.w. X.f.w. 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.Yan C.w.Yang f.f.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.D.z.ng T.X.z.ng w.z.ng z.K.z.ng m.z.a X.X.z.ai 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.z.ao J.z.ao L.z.ao L.z.z.ao S.P.z.ao f.z.eng Y.z.eng B.z.ou h.z.ou J.N.z.ou P Key Laboratory of Particle Astroph.ics&Experim.ntal Ph.sics Division&Com.uting Center Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China University of Ch.nese Academ. of Sciences Beijing 100049China TIANfu Cosm.c Ray Research.Center ChengduSichuanChina State Key Laboratory of Paricle Detection and Electronics China University of Science and Tech.ology of Ch.na HefeiAnhui 230026China Departm.nt of Engineering Ph.sics Tsinghua UniversityBeijing 100084China National Astronom.cal Observatories Chinese Academy of SciencesBeijing 100101China National Space Science Center Chinese Academy of SciencesBeijing 100190China Sch.ol of Ph.sics Peking UniversityBeijing 100871China Center for Astroph.sics Guangzhou UniversityGuangzhouGuangdong 510006China Sch.ol of Ph.sics and Astronom.&Sch.ol of Ph.sics(Guangz.ou) Sun Yat-sen UniversityZhuhaiGuangdong 519000China Sch.ol of Ph.sical Science and Tech.ology Guangxi UniversityNanningGuangxi 530004China h.bei Norm.l University ShijiazhuangHebei 050024China Sch.ol of Ph.sics and m.croelectronics Zhengzhou UniversityZhengzhouHenan 450001China Sch.ol of Astronom. and Space Science Nanjing UniversityNanjingJiangsu 210023China Key Laboratory of Dark m.tter and Space Astronom. Purple Mountain ObservatoryChinese Academy of SciencesNanjingJiangsu 210023China Institute of frontier and Interdisciplinary Science Shandong UniversityQingdaoShandong 266237China Key Laboratory for Research.in Galaxies and Cosm.logy Shanghai Astronomical ObservatoryChinese Academy of SciencesShanghai 200030China Tsung-Dao Lee Institute&Sch.ol of Ph.sics and Astronom. Shanghai Jiao Tong UniversityShanghai 200240China Sch.ol of Ph.sical Science and Tech.ology Southwest Jiaotong UniversityChengduSichuan 610031China College of Ph.sics Sichuan UniversityChengduSichuan 610065China Key Laboratory of Cosm.c Rays(Tibet University) Ministry of EducationLhasaTibet 850000China Sch.ol of ph.sics and tech.ology Wuhan UniversityWuhanHubei 430072Ch

Th. Lh.ASO-w.CTA experim.nt,w.ich.a.m. to observe cosm.c rays in th. sub-EeV range using th. fluorescence tech.iq.e,uses a new.generation of h.gh.perform.nce *** ensure th.t th. experim.nt h.s ex-cellent detection capability associated w.th.th. m.asurem.nt of th. energy spectrum.th. prim.ry com.osition of cosm.c rays,and so on,an accurate geom.trical reconstruction of air-sh.w.r events is *** paper de-scribes th. developm.nt and testing of geom.trical reconstruction for stereo view.d events using th. w.CTA(w.de field of view.Ch.renkov/fluorescence Telescope Array)*** approach.s,w.ich.take full advantage ofth. w.CTA *** *** is th. stereo-angular m.th.d,w.ich.uses th. pointing of triggered SiPm. in th. sh.w.r trajectory,and th. oth.r is th. stereo-tim.ng m.th.d,w.ich.uses th. triggering tim. of th. fired *** results sh.w.th.t both.m.th.ds h.ve good geom.trical resolution:th. resolution of th. stereo-tim.ng m.th.d is sligh.ly better th.n th. stereo-angular m.th.d because th. resolution of th. latter is sligh.ly lim.ted by th. sh.w.r track length.

关键词： cosm.c ray fluorescence telescope stereo observation geom.trical reconstruction

Observation of th. Crab Nebula w.th.Lh.ASO-Km.A−a perform.nce study

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Ch.nese Ph.sics C 2021年第2期45卷 518-530页

作者： f.Ah.ronian 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.Ch.ng J.f.Ch.ng X.C.Ch.ng B.m.Ch.n J.Ch.n L.Ch.n m.J.Ch.n m.L.Ch.n q.h.Ch.n S.h.Ch.n S.z.Ch.n T.L.Ch.n X.L.Ch.n Y.Ch.n N.Ch.ng Y.D.Ch.ng S.w.Cui X.h.Cui Y.D.Cui B.z.Dai h.L.Dai z.G.Dai D.della Volpe B.D'Ettorre Piaz.oli X.J.Dong J.h.f.n Y.z.fan z.X.fan J.fang K.fang C.f.feng L.feng S.h.f.ng 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.h.n h.h.h. h.N.h. J.C.h. S.L.h. X.B.h. Y.h. m.h.ller Y.K.h.r C.h.u X.h.u h.B.h. S.h. S.C.h. X.J.h. D.h.h.ang q.L.h.ang w.h.h.ang X.T.h.ang z.C.h.ang f.Ji X.L.Ji h.Y.Jia K.Jiang z.J.Jiang C.Jin D.Kulesh.v K.Levoch.in 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.m. L.L.m. X.h.m. J.R.m.o a.m.sood w.m.tth.m.iri T.m.ntaruli Y.C.Nan B.Y.Pang P.Pattarakijw.nich.z.Y.Pei m.Y.q. D.Ruffolo V.Rulev A.Sáiz.L.Sh.o O.Sh.h.golev X.D.Sh.ng J.R.Sh. h.C.Song Yu.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.w.i J.J.w.i Y.J.w.i T.w.n C.Y.w. h.R.w. S.w. w.X.w. X.f.w. 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.Yan C.w.Yang f.f.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.D.z.ng T.X.z.ng w.z.ng z.K.z.ng m.z.a X.X.z.ai 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.z.ao J.z.ao L.z.ao L.z.z.ao S.P.z.ao f.z.eng Y.z.eng B.z.ou h.z.ou J.N.z.ou P.z.ou R.z.ou X.X.z.ou C.G.zhu f.R.zhu h.zhu K.J.zhu X.z.o Key Laboratory of Particle Astroph.ics&Experim.ntal Ph.sics Division&Com.uting Center Institute of High Energy PhysicsChinese Academy of Sciences100049 BeijingChina University of Ch.nese Academ. of Sciences 100049 BeijingChina TIANfu Cosm.c Ray Research.Center ChengduSichuanChina State Key Laboratory of Particle Detection and Electronics China University of Science and Tech.ology of Ch.na 230026 HefeiAnhuiChina Departm.nt of Engineering Ph.sics Tsinghua University100084 BeijingChina National Astronom.cal Observatories Chinese Academy of Sciences100101 BeijingChina National Space Science Center Chinese Academy of Sciences100190 BeijingChina Sch.ol of Ph.sics Peking University100871 BeijingChina Center for Astroph.sics Guangzhou University510006 GuangzhouGuangdongChina Sch.ol of Ph.sics and Astronom.&Sch.ol of Ph.sics(Guangz.ou) Sun Yat-sen University519000 ZhuhaiGuangdongChina Sch.ol of Ph.sical Science and Tech.ology Guangxi University530004 NanningGuangxiChina h.bei Norm.l University 050024 ShijiazhuangHebeiChina Sch.ol of Ph.sics and m.croelectronics Zhengzhou University450001 ZhengzhouHenanChina Sch.ol of Astronom. and Space Science Nanjing University210023 NanjingJiangsuChina Key Laboratory of Dark m.tter and Space Astronom. Purple Mountain ObservatoryChinese Academy of Sciences210023 NanjingJiangsuChina Institute of frontier and Interdisciplinary Science Shandong University266237 QingdaoShandongChina Key Laboratory for Research.in Galaxies and Cosm.logy Shanghai Astronomical ObservatoryChinese Academy of Sciences200030 ShanghaiChina Tsung-Dao Lee Institute&Sch.ol of Ph.sics and Astronom. Shanghai Jiao Tong University200240 ShanghaiChina Sch.ol of Ph.sical Science and Tech.ology&Sch.ol of Inform.tion Science and Tech.ology Southwest Jiaotong University610031 ChengduSichuanChina College of Ph.sics Sichuan University610065 ChengduSichuanChina Key Laboratory of Cosm.c Rays(Tibet University) Ministry of Education850000 LhasaTibetChina Sch.ol of Ph.sics and Tec

A sub-array of th. Large h.gh.Altitude Air Sh.w.r Observatory(Lh.ASO),Km.A is m.inly designed to observe a large fraction of th. north.rn sky to h.nt for γ-ray sources at energies above 10 *** th.ugh.th. detector construction is still underw.y,h.lf of th. Km.A array h.s been operating stably since th. end of *** th.s paper,w. present th. Km.A data analysis pipeline and th. first observation of th. Crab Nebula,a standard candle in very h.gh.energy γ-ray *** detect γ-ray signals from.th. Crab Nebula in both.energy ranges of 10-100 TeV and>100 TeV w.th.h.gh.significance,by analyz.ng th. Km.A data of 136 live days betw.en Decem.er 2019 and m.y *** th. observations,w. test th. detector perform.nce,including angular resolution,pointing accuracy and cosm.c-ray background rejection *** energy spectrum.of th. Crab Nebula in th. energy range 10-250 TeV fits w.ll w.th.a single pow.r-law.function dN/dE=(1.13±0.05stat±0.08sys)×10^(-14).(E/20 TeV)-309±0.06stat±0.02syscm.(-2) s^(-1) TeV^(-1).It is consistent w.th.previous m.asurem.nts by oth.r *** opens a new.w.ndow.of γ-ray astronom. above 0.1 PeV th.ough.w.ich.new.ultrah.gh.energy γ-ray ph.nom.na,such.as cosm.c PeVatrons,m.gh. be discovered.

关键词： γ-ray Crab Nebula extensive air sh.w.rs cosm.c rays