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search for electron-antineutrinos associated with gravitational-wave events GW150914,GW151012,GW151226,GW170104,GW170608,GW170814,and GW170817 at Daya Bay

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chinese physics c 2021年第5期45卷 190-201页

作者： F.p.An A.B.Balantekin H.R.Band m.Bishai s.Blyth G.F.cao j.cao j.F.chang y.chang H.s.chen s.m.chen y.chen y.x.chen j.cheng Z.K.cheng j.j.cherwinka m.c.chu j.p.cummings O.Dalager F.s.Deng y.y.Ding m.V.Diwan T.Dohnal j.Dove m.Dvorak D.A.Dwyer j.p.Gallo m.Gonchar G.H.Gong H.Gong W.Q.Gu j.y.Guo L.Guo x.H.Guo y.H.Guo Z.Guo R.W.Hackenburg s.Hans m.He K.m.Heeger y.K.Heng A.Higuera y.K.Hor y.B.Hsiung B.Z.Hu j.R.Hu T.Hu Z.j.Hu H.x.Huang x.T.Huang y.B.Huang p.Huber D.e.jaffe K.L.jen x.L.ji x.p.ji R.A.johnson D.jones L.Kang s.H.Kettell s.Kohn m.Kramer T.j.Langford j.Lee j.H.c.Lee R.T.Lei R.Leitner j.K.c.Leung F.Li j.j.Li Q.j.Li s.Li s.c.Li W.D.Li x.N.Li x.Q.Li y.F.Li Z.B.Li H.Liang c.j.Lin G.L.Lin s.Lin j.j.Ling j.m.Link L.Littenberg B.R.Littlejohn j.c.Liu j.L.Liu c.Lu H.Q.Lu j.s.Lu K.B.Luk x.B.ma x.y.ma y.Q.ma c.marshall D.A.martinez caicedo K.T.meDonald R.D.mcKeown y.meng j.Napolitano D.Naumov e.Naumova j.p.Ochoa-Ricoux A.OIshevskiy H.-R.pan j.park s.patton j.c.peng c.s.j.pun F.Z.Qi m.Qi x.Qian N.Raper j.Ren c.morales Reveco R.Rosero B.Roskovec x.c.Ruan H.steiner j.L.sun T.Tmej K.Treskov W.-H.Tse c.e.Tull B.Viren V.Vorobel c.H.Wang j.Wang m.Wang N.y.Wang R.G.Wang W.Wang W.Wang x.Wang y.Wang y.F.Wang Z.Wang Z.Wang Z.m.Wang H.y.Wei L.H.Wei L.j.Wen K.Whisnant c.G.White H.L.H.Wong e.Worcester D.R.Wu F.L.Wu Q.Wu W.j.Wu D.m.xia Z.Q.xie Z.Z.xing j.L.xu T.xu T.xue c.G.yang L.yang y.Z.yang H.F.yao m.ye m.yeh B.L.young H.Z.yu Z.y.yu B.B.yue s.zeng y.zeng L.Zhan c.zhang F.y.zhang H.H.zhang j.W.zhang Q.m.zhang x.T.zhang y.m.zhang y.x.zhang y.y.zhang Z.j.zhang Z.p.zhang Z.y.zhang j.Zhao L.Zhou H.L.Zhuang j.H.Zou Instiute of modern physics East China University of Science and TechnologyShanghai 200237 University of Wisconsin MadisonWisconsin 53706 Wright Laboratory and Department of physics Yale UniversityNew HavenConnecticut 06520 Brookhaven National Laboratory UptonNew York 11973 Department of physics National Taiwan UniversityTaipei Institute of High energy physics Beijing 100049 National United University Miao-Li Department of engineering physics Tsinghua UniversityBejing 100084 shenzhen University Shenzhen 518060 sun yat-sen(Zhongshan)University Guangzhou North china electric power University Bejjing 102206 chinese University of Hong Kong Hong Kong 999077 siena college LoudonvilleNew York 12211 Department of physics and Astronomy University of CaliforniaIrvineCaliformia 92697 University of science and Technology of china Hefei 230026 charles University Faculty of Mathematics and PhysicsPrague Department of physics University of llinois at Urbana-ChampaignUrbanaIlinois 61801 Lawrence Berkeley National Laboratory BerkeleyCalifornia 94720 Department of physics Illinois Institute of TechnologyChicagoIllinois 60616 joint Institute for Nuclear Research DubnaMoscow Region Beijing Normal University Beijing 100875 Department of Nuclear science and Technology School of Energy and Power EngineeringXi'an Jiaotong UniversityXi'an 710049 Department of physics University of HoustonHoustonTexas 77204 china Institute of Atomic energy Beijing 102413 shandong University Jinan 250100 Guangxi University Nanning 530004 center for Neutrino physics Virginia TechBlacksburgVirginia 24061 Institute of physics National Chiao-Tung UniversityHsinchu Department of physics University of CincinnatiCincinnatiOhio 45221 Department of physies Collge of Science and TechnologyTemple UniversityPhiladelphiaPennsylvania 19122 dongguan University of Technology Dongguan 523808 Department of physics University of CaliforniaBerkeleyCalifornia 94720 Department of physics The University of Hong KongPokfulamHong Kong 999077 school

The establishment of a possible connection between neutrino emission and gravitational-wave(GW)bursts is important to our understanding of the physical processes that occur when black holes or neutron stars *** the Daya Bay experiment,using the data collected from December 2011 to August 2017,a search was per-formed for electron-antineutrino signals that coincided with detected GW events,including GW150914,GW151012,GW151226,GW170104,GW170608,GW 170814,and GW *** used three time windows of±10,±500,and±1000 s relative to the occurrence of the GW events and a neutrino energy range of 1.8 to 100 meV to search for correlated neutrino *** detected electron-antineutrino candidates were consistent with the expected background rates for all the three time *** monochromatic spectra,we found upper limits(90%confidence level)of the electron-antineutrino fluence of(1.13-2.44)×10^(11)cm^(-2)at 5 meV to 8.0×10^(7)cm^(-2)at 100 meV for the three time w *** the assumption of a Fermi-Dirac spectrum,the upper limits were found to be(5.4-7.0)×10^(9)cm^(2)for the three time windows.

关键词： grav itational waves electron-antineutrinos fluence upper limit

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Observation of e^+e^-→D_s^+■^((*)0)K^- and study of the p-wave D_s mesons

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chinese physics c 2019年第3期43卷 5-16页

作者： m.Ablikim m.N.Achasov s.Ahmed m.Albrecht m.Alekseev A.Amoroso F.F.An Q.An y.Bai O.Bakina R.Baldini Ferroli y.Ban K.Begzsuren D.W.Bennett j.V.Bennett N.Berger m.Bertani D.Bettoni F.Bianchi I.Boyko R.A.Briere H.cai x.cai A.calcaterra G.F.cao s.A.cetin j.chai j.F.chang W.L.chang G.chelkov G.chen H.s.chen j.c.chen m.L.chen s.j.chen y.B.chen W.s.cheng G.cibinetto F.cossio H.L.Dai j.p.Dai A.Dbeyssi D.Dedovich Z.y.Deng A.Denig I.Denysenko m.Destefanis F.De mori y.Ding c.dong j.dong L.y.dong m.y.dong Z.L.Dou s.x.Du j.Z.Fan j.Fang s.s.Fang y.Fang R.Farinelli L.Fava F.Feldbauer G.Felici c.Q.Feng m.Fritsch c.D.Fu y.Fu Q.Gao x.L.Gao y.N.Gao y.G.Gao Z.Gao B.Garillon I.Garzia A.Gilman K.Goetzen L.Gong W.x.Gong W.Gradl m.Greco L.m.Gu m.H.Gu s.Gu y.T.Gu A.Q.Guo L.B.Guo R.p.Guo y.p.Guo A.Guskov Z.Haddadi s.Han x.Q.Hao F.A.Harris K.L.He F.H.Heinsius T.Held y.K.Heng Z.L.Hou H.m.Hu j.F.Hu T.Hu y.Hu G.s.Huang j.s.Huang x.T.Huang x.Z.Huang Z.L.Huang N.Huesken T.Hussain W.Ikegami Andersson W.Imoehl m.Irshad Q.ji Q.p.ji x.B.ji x.L.ji H.L.jiang x.s.jiang x.y.jiang j.B.jiao Z.jiao D.p.jin s.jin y.jin T.johansson N.Kalantar-Nayestanaki x.s.Kang m.Kavatsyuk B.c.Ke I.K.Keshk T.Khan A.Khoukaz p.Kiese R.Kiuchi R.Kliemt L.Koch O.B.Kolcu B.Kopf m.Kuemmel m.Kuessner A.Kupsc m.Kurth W.Kühn j.s.Lange p.Larin L.Lavezzi H.Leithoff c.Li cheng Li D.m.Li F.Li F.y.Li G.Li H.B.Li H.j.Li j.c.Li j.W.Li Ke Li L.K.Li Lei Li p.L.Li p.R.Li Q.y.Li W.D.Li W.G.Li x.L.Li x.N.Li x.Q.Li Z.B.Li H.Liang y.F.Liang y.T.Liang G.R.Liao L.Z.Liao j.Libby c.x.Lin D.x.Lin B.Liu B.j.Liu c.x.Liu D.Liu D.y.Liu F.H.Liu Fang Liu Feng Liu H.B.Liu H.L Liu H.m.Liu Huanhuan Liu Huihui Liu j.B.Liu j.y.Liu K.y.Liu Kai Liu Ke Liu Q.Liu s.B.Liu x.Liu y.B.Liu Z.A.Liu Zhiqing Liu y.F.Long x.c.Lou H.j.Lu j.D.Lu j.G.Lu y.Lu y.p.Lu c.L.Luo m.x.Luo p.W.Luo T.Luo x.L.Luo s.Lusso x.R.Lyu F.c.ma H.L.ma L.L.ma m.m.ma Q.m.ma x.N.ma x.x.ma x.y.ma y.m.ma F.e.maas m.maggiora s.maldaner Q.A.malik A.mangoni y.j.mao Z.p.mao s.marcello Z.x.meng j.G.messchendorp G.mezzadri j.min T.j.min R.e.mitchell x.H.mo y Institute of High energy physics Beijing 100049China Beihang University Beijing 100191China Beijing Institute of petrochemical Technology Beijing 102617China Bochum Ruhr-University D-44780 BochumGermany carnegie mellon University PittsburghPennsylvania 15213USA central china Normal University Wuhan 430079China china center of Advanced science and Technology Beijing 100190China cOmsATs University Islamabad Lahore CampusDefence RoadOff Raiwind Road54000 LahorePakistan Fudan University Shanghai 200443China G.I.Budker Institute of Nuclear physics sB RAs(BINp) Novosibirsk 630090Russia GsI Helmholtzcentre for Heavy Ion Research GmbH D-64291 DarmstadtGermany Guangxi Normal University Guilin 541004China Guangxi University Nanning 530004China Hangzhou Normal University Hangzhou 310036China Helmholtz Institute mainz Johann-Joachim-Becher-Weg 45D-55099 MainzGermany Henan Normal University Xinxiang 453007China Henan University of science and Technology Luoyang 471003China Huangshan college Huangshan 245000China Hunan Normal University Changsha 410081China Hunan University Changsha 410082China Indian Institute of Technology madras Chennai 600036India Indiana University BloomingtonIndiana 47405USA INFN Laboratori Nazionali di Frascati I-00044FrascatiItaly INFN sezione di Ferrara I-44122FerraraItaly Institute of physics and Technology Peace Ave.54BUlaanbaatar 13330Mongolia johannes Gutenberg University of mainz Johann-Joachim-Becher-Weg 45D-55099 MainzGermany joint Institute for Nuclear Research 141980 DubnaMoscow regionRussia justus-Liebig-Universitaet Giessen II.Physikalisches InstitutHeinrich-Buff-Ring 16D-35392 GiessenGermany KVI-cART University of GroningenNL-9747 AA GroningenThe Netherlands Lanzhou University Lanzhou 730000China Liaoning University Shenyang 110036China Nanjing Normal University Nanjing 210023China Nanjing University Nanjing 210093China Nankai University Tianjin 300071China peking University Beijing 100871China shandong University Jinan 250100China shanghai

studies of e^+e~→D_s^+■^((*)0)K^-and the p-wave charmed-strange mesons are performed based on an e^+e^-collision data sample corresponding to an integrated luminosity of 567 pb^(-1) collected with the BesIII detector at s^(1/2)=4.600 GeV. The processes of e^+e^-→D_s^+■^(*0)K^- and D_s^+■~0K^- are observed for the first time and are found to be dominated by the modes D_s^+D_(s1)(2536)^-and D_s^+D_(s2)~*(2573)^-, respectively. The Born cross sections are measured to be σ~B(e^+e^-→D_s^+■^(*0)K^-) =(10.1±2.3±0.8) pb and σ~B(e^+e^-→D_s^+■~0K^-) =(19.4±2.3± 1.6) pb, and the products of Born cross section and the decay branching fraction are measured to be σ~B(e^+e^-→D_s^+D_(s1)(2536)^-+c.c.)·B(D_(s1)(2536)^-→■^(*0)K^-)=(7.5±1.8±0.7) pb and σ~B(e^+e^-→D_s^+D_(s2)~*(2573)^-+ c.c.)·B(D_(s2)~*(2573)^-→■~0 K^-)=(19.7 ± 2.9 ±2.0) pb. For the D_(s1)(2536)^-and D_(s2)~*(2573)^-mesons, the masses and widths are measured to be m(D_(s1)(2536)^-)=(2537.7±0.5 ±3.1) meV/c2, Γ(D_(s1)(2536)^-) =(1.7 ±1.2 ±0.6)meV, and m(D_(s2)~*(2573)^-)=(2570.7±2.0 ±1.7) meV/c^2, Γ(D_(s2)~*(2573)^-)=(17.2 ±3.6 ±1.1) meV. The spin-parity of the D_(s2)~*(2573)^-meson is determined to be j^p= 2^+. In addition, the processes e^+e^-→D_s^+■^((*)0)K^-are searched for using the data samples taken at four(two) center-of-mass energies between 4.416(4.527) and 4.575 GeV, and upper limits at the 90% confidence level on the cross sections are determined.

关键词： cross section p-wave D_s mesons resonance parameters spin-parity BesIII

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prospects for a multi-TeV gamma-ray sky survey with the LHAAsO water cherenkov detector array

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chinese physics c 2020年第6期44卷 123-132页

作者： F.Aharonian V.Alekseenko Q.An Axikegu L.x.Bai y.W.Bao D.Bastieri9 x.j.Bi H.cai Zhe cao Zhen cao j.chang j.F.chang x.c.chang s.p.chao B.m.chen j.chen L.chen L.chen m.L.chen m.j.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 B.D'ettorre piazzoli j.Fang j.H.Fan y.Z.Fan c.F Feng L.Feng s.H.Feng y.L.Feng B.Gao Q.Gao W.Gao m.m.Ge L.s.Geng G.H.Gong Q.B.Gou m.H.Gu y.Q.Guo y.y.Guo y.A.Han H.H.He j.c.He m.Heller s.L.He y.He c.Hou D.H.Huang Q.L.Huang W.H.Huang x.T.Huang H.B.Hu s.Hu H.y.jia K.jiang F.ji c.jin x.L.ji K.Levochkin e.W.Liang y.F Liang cheng Li cong Li F.Li H.Li H.B.Li H.c.Li H.m.Li j.Li K.Li W.L.Li x.Li x.R.Li y.Li Z.Li Z.Li B.Liu c.Liu D.Liu H.D.Liu H.Liu j.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 j.R.mao A.masood x.H.ma W.mitthumsiri T.montaruli y.c.Nan p.pattarakijwanich Z.y.pei B.Q.Qiao m.y.Qi D.Ruffolo V.Rulev A.sáiz L.shao O.shchegolev x.D.sheng j.R.shi y.stenkin V.stepanov Z.B.sun p.H.T.Tam Z.B.Tang W.W.Tian D.D.Volpe c.Wang H.Wang H.G.Wang j.c.Wang L.y.Wang W.Wang W.Wang x.G.Wang x.y.Wang x.j.Wang y.D.Wang y.j.Wang y.N.Wang y.p.Wang Z.Wang Z.H.Wang Z.x.Wang D.m.Wei j.j.Wei T.Wen c.y.Wu H.R.Wu s.Wu W.x.Wu x.F.Wu G.m.xiang G.xiao G.G.xin y.xing R.x.xu L.xue D.H.yan c.W.yang F.F.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 Q.yuan y.H.yu Z.j.jiang H.D.zeng T.x.zeng W.zeng Z.K.zeng m.Zha B.B.zhang H.m.zhang H.y.zhang j.L.zhang j.W.zhang L.zhang p.F.zhang p.p.zhang s.R.zhang s.s.zhang x.zhang x.p.zhang yi zhang yong zhang y.F.g zhang B.Zhao j.Zhao L.Zhao L.Z.Zhao F.Zheng y.Zheng j.N.Zhou p.Zhou R.Zhou x.x.Zhou c.G.Zhu F.R.Zhu H.Zhu K.j.Zhu x.Zuo Institute of High energy physics Chinese Academy of SciencesBeijing 100049China University of chinese Academy of sciences Beijing 100049China TIANFU cosmic Ray Research center ChengduShichuanChina University of science and Technology of china 230026 HefeiAnhuiChina Tsinghua University 100084 BeijingChina National Astronomical Observatories Chinese Academy of Sciences100101 BeijingChina National space science center Chinese Academy of Sciences100190 BeijingChina school of physics Peking University100871 BeijingChina center for Astrophysics Guangzhou University510006 GuangzhouGuangdongChina sun yat-sen University 519000 ZhuhaiGuangdongChina shool of physics and Technology Guangxi University530004 NanningGuangxiChina Hebei Normal University 050024 ShijiazhuangHebeiChina school of physics and engineering Zhengzhou University450001 ZhengzhouHenanChina Nanjing University 210023 NanjingJiangsuChina Key Laboratory of Dark matter and space Astronomy Purple Mountain ObservatoryChinese Academy of Sciences210034 NanjingJiangsuChina Institute of Frontier and Interdisciplinary science Shandong University266237 QingdaoShandongChina shanghai Astronomical Observatory Chinese Academy of Sciences200030 ShanghaiChina school of physical science and Technology Southwest Jiaotong University610031 ChengduSichuanChina sichuan University 610065 ChengduSichuanChina Key Laboratory of cosmic Rays(Tibet University) Ministry of Education850000 LhasaTibetChina school of physics and technology Wuhan university430072 WuhanChina yunnan University 650091 KunmingYunnanChina yunnan Astronomical Observatories Chinese Academy of Sciences650216 KunmingYunnanChina Institute for Nuclear Research Russian Academy of SciencesMoscowRussia Département de physique Nucléaire et corpusculaire Facultéde SciencesUniversitéde GenéveGenevaSwitzerland Department of physics Faculty of ScienceMahidol UniversityBangkokThailand Dublin Institute for Advanced studies 31 Fitzwilliam PlaceDublin 2Ireland max-planc

The Water cherenkov Detector Array(WcDA) is a major component of the Large High Altitude Air shower Array Observatory(LHAAsO), a new generation cosmic-ray experiment with unprecedented sensitivity, currently under construction. WcDA is aimed at the study of TeV γ-rays. In order to evaluate the prospects of searching for TeV γ-ray sources with WcDA, we present a projection of the one-year sensitivity of WcDA to TeV γ-ray sources from TeVcat using an all-sky approach. Out of 128 TeVcat sources observable by WcDA up to a zenith angle of 45°, we estimate that 42 would be detectable in one year of observations at a median energy of 1 TeV. most of them are Galactic sources, and the extragalactic sources are Active Galactic Nuclei(AGN).

关键词： TeVγ-ray astronomy observational prospect LHAAsO-WcDA

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LHAAsO-Km2A detector simulation using Geant4

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Radiation Detection Technology and methods 2024年第3期8卷 1437-1447页

作者： Zhen cao F.Aharonian Q.An Axikegu y.x.Bai y.W.Bao D.Bastieri x.j.Bi y.j.Bi j.T.cai Q.cao W.y.cao Zhe cao j.chang j.F.chang A.m.chen e.s.chen Liang chen Lin chen Long chen m.j.chen m.L.chen Q.H.chen s.H.chen s.Z.chen T.L.chen y.chen N.cheng y.D.cheng m.y.cui s.W.cui x.H.cui y.D.cui B.Z.Dai H.L.Dai Z.G.Dai Danzengluobu x.Q.dong K.K.Duan j.H.Fan y.Z.Fan j.Fang K.Fang c.F.Feng L.Feng s.H.Feng x.T.Feng y.L.Feng s.Gabici B.Gao c.D.Gao L.Q.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.Han H.H.He H.N.He j.y.He x.B.He y.He y.K.Hor B.W.Hou c.Hou x.Hou H.B.Hu Q.Hu s.c.Hu D.H.Huang T.Q.Huang W.j.Huang x.T.Huang x.y.Huang y.Huang Z.c.Huang x.L.ji H.y.jia K.jia K.jiang x.W.jiang Z.j.jiang m.jin m.m.Kang T.Ke D.Kuleshov K.Kurinov B.B.Li cheng Li cong Li D.Li F.Li H.B.Li H.c.Li H.y.Li j.Li jian Li jie Li K.Li W.L.Li W.L.Li x.R.Li xin Li y.Z.Li Zhe Li Zhuo 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.y.Liu m.y.Liu R.y.Liu s.m.Liu W.Liu y.Liu y.N.Liu R.Lu Q.Luo H.K.Lv B.Q.ma L.L.ma x.H.ma j.R.mao Z.min W.mitthumsiri H.j.mu y.c.Nan A.Neronov 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 D.semikoz c.y.shao L.shao O.shchegolev x.D.sheng F.W.shu H.c.song yu.V.stenkin V.stepanov y.su Q.N.sun x.N.sun Z.B.sun p.H.T.Tam Q.W.Tang Z.B.Tang W.W.Tian c.Wang c.B.Wang G.W.Wang H.G.Wang H.H.Wang j.c.Wang K.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 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.F.xu R.x.xu W.L.xu L.xue D.H.yan j.Z.yan T.yan c.W.yang F.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 m.Zha B.B.zhang F.zhang H.m.zhang H.y.zhang j.L.zhang L.x.zhang Li zhang p.F.zhang p.p.zhang R.zhang s.B.Zh Key Laboratory of particle Astrophysics&experimental physics Division&computing center Institute of High Energy PhysicsChinese Academy of SciencesBeijing100049China University of chinese Academy of sciences Beijing100049China TIANFU cosmic Ray Research center ChengduSichuanChina Dublin Institute for Advanced studies 31 Fitzwilliam Place2 DublinIreland max-planck-Institute for Nuclear physics 69029Heidelberg103980Germany state Key Laboratory of particle Detection and electronics BeijingChina University of science and Technology of china Hefei230026AnhuiChina school of physical science and Technology&school of Information science and Technology Southwest Jiaotong UniversityChengdu610031SichuanChina school of Astronomy and space science Nanjing UniversityNanjing210023JiangsuChina center for Astrophysics Guangzhou UniversityGuangzhou510006GuangdongChina Hebei Normal University Shijiazhuang050024HebeiChina Key Laboratory of Dark matter and space Astronomy&Key Laboratory of Radio Astronomy Purple Mountain ObservatoryChinese Academy of SciencesNanjing 210023JiangsuChina 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 UniversityGuangzhouZhuhai 510275519000GuangdongChina school of physics and Astronomy Yunnan UniversityKunming 650091YunnanChina Institute of Frontier and Interdisciplinary science Shandong UniversityQingdao 266237ShandongChina Apc UniversitéParis CitéCNRS/IN2P3CEA/IRFUObservatoire de ParisParis 11975205France Department of engineering phys

Km2A is one of the main sub-arrays of LHAAsO,working on gamma ray astronomy and cosmic ray physics at energies above 10 *** simulation is the important foundation for estimating detector performance and data *** is a big challenge to simulate the Km2A detector in the framework of Geant4 due to the need to track numerous photons from a large number of detector units(>6000)with large altitude difference(30)and huge coverage(1.3).In this paper,the design of the Km2A simulation code G4Km2A based on Geant4 is *** process of G4Km2A is optimized mainly in memory consumption to avoid memory *** simplifications are used to significantly speed up the execution of *** running time is reduced by at least 30 times compared to full detector *** particle distributions and the core/angle resolution comparison between simulation and experimental data of the full Km2A array are also presented,which show good agreement.

关键词： LHAAsO Km2A simulation GeANT4

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measurement of the integrated Luminosities of cross-section scan data samples around theψ(3770)mass region

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chinese physics c 2018年第6期42卷 1-8页

作者： m. Ablikim m. N. Achasov s. Ahmed m. Albrecht m. Alekseev A. Amoroso F. F. An Q. An y. Bai O. Bakina R. Baldini Ferroli y. Ban K. Begzsuren D. W. Bennett j. V. Bennett N. Berger m. Bertani D. Bettoni F. Bianchi e. Boger I. Boyko R. A. Briere H. cai x. cai O. cakir A. calcaterra G. F. cao s. A. cetin j. chai j. F. chang W. L. chang G. chelkov G. chen H. s. chen j. c. chen m. L. chen p. L. chen s. j. chen x. R. chen y. B. chen x. K. chu G. cibinetto F. cossio H. a. Dai, j. F. Dai A. Dbeyssi D. Dedovich Z. y. Deng A. Denig I. Denysenko m. Destefanis F. De mori y. Ding c. dong j. dong L. y. dong m. y. dong Z. L. Dou s. x. Du p. F. nuan j. Fang s. s. Fang y. Fang R. Farinelli L. Fava s. Fegan F. Feldbauer G. Felici c. Q. Feng e. Fioravanti m. Fritsch c. D. Fu Q. Gao x. L. Gao y. Gao, y. G. Gao Z. Gao B. Garillon I. Garzia A. Gilman K. Goetzen L. Gong W. x. Gong W. Gradl m. Greco L. m. Gu m. H. Gu y. T. Gu A. q. Guo L. B. Guo R. p. Guo y. F. Guo A. Guskov Z. Haddadi s. Han x. Q. Hao F. A. Harris Z. L. He x. O. He F. H. Heinsius T. Held y. K. Heng T. Holtmann Z. L. Hou H. m. Hu j. F. gu T. Hu y. Hu G. s. Huang j. s. Huang x. T. Huang x. Z. Huang Z. L. guang T. Hussain W. Ikegami Andersson m Irshad Q. ji Q. p. ji x. B. ji x. L. ji x. s. jiang x. y. jiang j. B. jiao Z. jiao D. p. jin s. jin y. jin T. johansson A. julin N. Kalantar-Nayestanaki x. s. Kang m. Kavatsyuk B. c. Ke T. Khan A. Khoukaz p. Kiese R. Kliemt L. Koch O. B. Kolcu B. Kopf m. Kornicer m. Kuemmel m. Kuessner A. Kupsc m. Kurth W. Kiihn j. s. Lange m. Lara p. Larin L. Lavezzi s. Leiber H. Leithofi 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 K. j. Li Kang Li Ke Li Lei Li p. L. Li p. R. Li Q. y. Li T. Li W. D. Li W. G. Li x. L. Li x. N. Li x. Q. Li Z. B. Li H. Liang y. F. Liang y. T. Liang G. R. Liao L. Z. Liao j. Libby c. x. Lin D. x. Lin s. Liu B. j. Liu c. x. Liu D. Liu D. y. Liu F. H. Liu Fang Liu Feng Liu H. B. Liu H. L Liu H. m. Liu Huanhuan Liu Huihui Liu j. B. Liu j. y. Liu K. Liu K. y. Liu Ke Liu L. D. Liu Q. Liu s B. Y. Zhang144 C. C. Zhang1D. H. Zhang1 H. H. Zhang45H. Y. Zhang144 J. Zhang151 J. L. Zhang65 J. Q. Zhang4 J. W. Zhang1 J. Y. Zhang1 J. Z. Zhang151 K. Zhang151 L. Zhang46 S. F. Zhang35 T. J. Zhang3975 X. Y. Zhang38 Y. Zhang4457 Y. H. Zhang144 Y. T. Zhang4557 Yang Zhang1 Yao Zhang1 Yu Zhang51 Z. H. Zhang6 Z. P. Zhan57Z. Y. Zhang64 G. Zhao1J. W. Zhao144 J. Y. Zhao151 J. Z. Zhao144 Lei Zhao4457 Ling Zhao1 M. G. Zhao35 Q. Zhao1 S. J. Zhao67 T. C. Zhao1 Y. B. Zhao144 Z. G. Zhao4457 A. Zhemehugov2869 B. Zheng58J. P. Zheng144 W. J. Zheng38 Y. H. Zheng51B. Zhong33 L. Zhou144 Q. Zhou151 X. Zhou64 X. K. Zhou4457 X. R. Zhou4457 X. Y. Zhou1 A. N. Zhu151 J. Zhu35 J. Zhu45 K. Zhu1 K. J. Zhu1 S. Zhu1 S. H. Zhu56 X. L. Zhu46 Y. C. Zhu4457 Y. S. Zhu151 Z. A. Zhu151 J. Zhuang144B. S. Zou1 J. H. Zou1 （ 1 Institute of High Energy Physics Beijing 100049 China Beihang University Beijing 100191 China Beijing Institute of petrochemical Technology Beijing 102617 China Bochum Ruhr-University D-44780 Bochum Germany carnegie mellon University Pittsburgh Pennsylvania 15213 USA central china Normal University Wuhan 430079 China china center of Advanced science and Technology Beijing 100190 China cOmsATs Institute of Information Technology Lahore Defence Road Off Raiwind Road 54000 Lahore Pakistan G.I. Budker Institute of Nuclear physics sB RAs （BINp） Novosibirsk 630090 Russia GsI Helmholtzcentre for Heavy Ion Research GmbH D-64291 Darmstadt Germany Guangxi Normal University Guilin 541004 China Guangxi University Nanning 530004 China Hangzhou Normal University Hangzhou 310036 China Helmholtz Institute mainz JohannwJoachim-Becher-Weg 45 D-55099 Mainz Germany Henan Normal University Xinxiang 453007 China Henan University of science and Technology Luoyang 471003 China Huangshan college Huangshan 245000 China Hunan Normal University Changsha 410081 China Hunan University Changsha 410082 China Indian Institute of Tec

To investigate the nature of the Ψ（3770） resonance and to measure the cross section for e^＋e^-→DD, a cross-section scan data sample, distributed among 41 center-of-mass energy points from 3.73 to 3.89 GeV, was taken with the BesIII detector operated at the BepcII collider in the year 2010. By analyzing the large angle Bhabha scattering events, we measure the integrated luminosity of the data sample at each center-of-mass energy point. The total integrated luminosity of the data sample is 76.16±0.04±0.61 pb^-1, where the first uncertainty is statistical and the second systematic.

关键词： Bhabha scattering events integrated luminosity BesⅢ

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Antineutrino energy spectrum unfolding based on the Daya Bay measurement and its applications

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chinese physics c 2021年第7期45卷 1-19页

作者： F.p.An A.B.Balantekin m.Bishai s.Blyth G.F.cao j.cao j.F.chang y.chang H.s.chen s.m.chen y.chen y.x.chen j.cheng Z.K.cheng j.j.cherwinka m.c.chu j.p.cummings O.Dalager F.s.Deng y.y.Ding m.V.Diwan T.Dohnal D.Dolzhikov j.Dove m.Dvorak D.A.Dwyer j.p.Gallo m.Gonchar G.H.Gong H.Gong m.Grassi W.Q.Gu j.y.Guo L.Guo x.H.Guo y.H.Guo Z.Guo R.W.Hackenburg s.Hans a m.He K.m.Heeger y.K.Heng y.K.Hor y.B.Hsiung B.Z.Hu j.R.Hu T.Hu Z.j.Hu H.x.Huang j.H.Huang x.T.Huang y.B.Huang p.Huber D.e.jaffe K.L.jen x.L.ji x.p.ji R.A.johnson D.jones L.Kang s.H.Kettel s.Kohn m.Kramer T.j.Langford j.Lee j.H.c.Lee R.T.Lei R.Leitner j.K.c.Leung F.Li H.L.Li j.j.Li Q.j.Li R.H.Li s.Li s.c.Li W.D.Li x.N.Li x.Q.Li y.F.Li Z.B.Li H.Liang c.j.Lin G.L.Lin s.Lin j.j.Ling j.m.Link26 L.Littenberg B.R.Littlejohn j.c.Liu j.L.Liu j.x.Liu c.Lu H.Q.Lu K.B.Luk B.Z.ma x.B.ma x.y.ma y.Q.ma R.c.mandujano c.marshall K.T.mcDonald R.D.mcKeown y.meng j.Napolitano D.Naumov e.Naumova T.m.T.Nguyen j.p.Ochoa-Ricoux A.Olshevskiy H.-R.pan j.park s.patton j.c.peng c.s.j.pun F.Z.Qi m.Qi x.Qian N.Raper j.Ren c.morales Reveco R.Rosero B.Roskovec x.c.Ruan H.steiner j.L.sun T.Tmej1 K.Treskov W.-H.Tse c.e.Tull B.Viren V.Vorobel c.H.Wang j.Wang m.Wang N.y.Wang R.G.Wang W.Wang W.Wang x.Wang y.Wang y.F.Wang Z.Wang Z.Wang Z.m.Wang H.y.Wei L.H.Wei L.j.Wen K.Whisnant c.G.White H.L.H.Wong e.Worcester D.R.Wu F.L.Wu Q.Wu W.j.Wu D.m.xia Z.Q.xie Z.Z.xing H.K.xu j.L.xu T.xu T.xue c.G.yang L.yang y.Z.yang H.F.yao m.ye m.yeh B.L.young H.Z.yu Z.y.yu B.B.yue V.Zavadskyi s.zeng y.zeng L.Zhan c.zhang F.y.zhang H.H.zhang j.W.zhang Q.m.zhang s.Q.zhang x.T.zhang y.m.zhang y.x.zhang y.y.zhang Z.j.zhang Z.p.zhang Z.y.zhang j.Zhao R.Z.Zhao L.Zhou H.L.Zhuang j.H.Zou Institute of modern physics East China University of Science and TechnologyShanghai 200337 University of Wisconsin MadisonWisconsin 53706 Brookhaven National Laboratory UptonNew York 11973 Department of physics Nnational Taiwan UniversityTaipei Institute of High energy physics Beijing 100049 National United University Miao-Li Department of engineering physics Tsinghua UniversityBeijing 100048 shenzhen University Shenzhen 518061 sun yat-sen(Zhongshan)University Guangzhou 510275 North china electric power University Beijing 102206 chinese University of Hong Kong Hongkong 999077 siena college LoudonvilleNew York 12211 Department of physics and Astronomy University of CaliforniaIrvineCalifornia 92697 University of science and Technology of china Hefei 230022 charles University Faculty of Mathematics and PhysicsPrague joint Institute for Nuclear Research DubnaMoscow Region Department of physics University of Illinois at Urbana-ChampaignUrbanaIllinois 61801 Lawrence Berkeley National Laboratory BerkeleyCalifornia 94720 Department of physics Illinois Institute of TechnologyChicagoIllinois 60616 Beijing Normal University Beijing 100875 Department of Nuclear science and Technology School of Energy and Power EngineeringXi'an Jiaotong UniversityXi'an 710049 Wright Laboratory and Department of physics Yale UniversityNew HavenConnecticut 06520 china Institute of Atomic energy Beijing 102413 shandong University Jinan 250002 Guangxi University No.100 Daxue East RoadNanning 530004 center for Neutrino physics Virginia TechBlacksburgVirginia 24061 Institute of physics NCTUHsinchu Department of physics University of CincinnatiCincinnatiOhio 45221 Department of physics College of Science and TechnologyTemple UniversityPhiladelphiaPennsylvania 19122 dongguan University of Technology Dongguan 523808 Department of physics University of CaliforniaBerkeleyCalifornia 94720 Department of physics The University of Hong KongPokfulamHongkong 999077 school of physics Nankai UniversityTianjin 300071 Department o

The prediction of reactor antineutrino spectra will play a crucial role as reactor experiments enter the precision *** positron energy spectrum of 3.5 million antineutrino inverse beta decay reactions observed by the Daya Bay experiment,in combination with the fission rates of fissile isotopes in the reactor,is used to extract the positron energy spectra resulting from the fission of specific *** information can be used to produce a precise,data-based prediction of the antineutrino energy spectrum in other reactor antineutrino experiments with different fission fractions than Daya *** positron energy spectra are unfolded to obtain the antineutrino energy spectra by removing the contribution from detector response with the Wiener-sVD unfolding *** results are obtained with other unfolding methods.A technique to construct a data-based prediction of the reactor antineutrino energy spectrum is proposed and *** the reactor fission fractions,the technique can predict the energy spectrum to a 2%*** addition,we illustrate how to perform a rigorous comparison between the unfolded antineutrino spectrum and a theoretical model prediction that avoids the input model bias of the unfolding method.

关键词： reactor antineutrino energy spectrum Daya Bay application

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evidence for particle acceleration approaching peV energies in the W51 complex

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

作者： LHAAsO collaboration Zhen cao F.Aharonian 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 Zhe cao j.chang j.F.chang A.m.chen e.s.chen H.x.chen Liang chen Lin chen Long chen m.j.chen m.L.chen Q.H.chen s.chen s.H.chen s.Z.chen T.L.chen y.chen N.cheng y.D.cheng m.y.cui s.W.cui x.H.cui y.D.cui B.Z.Dai H.L.Dai Z.G.Dai Danzengluobu x.Q.dong K.K.Duan j.H.Fan y.Z.Fan j.Fang j.H.Fang K.Fang c.F.Feng H.Feng L.Feng s.H.Feng 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.Han m.Hasan H.H.He H.N.He j.y.He y.He y.K.Hor B.W.Hou c.Hou x.Hou H.B.Hu Q.Hu s.c.Hu D.H.Huang T.Q.Huang W.j.Huang x.T.Huang x.y.Huang y.Huang x.L.ji H.y.jia K.jia K.jiang x.W.jiang Z.j.jiang m.jin m.m.Kang I.Karpikov D.Kuleshov K.Kurinov B.B.Li c.m.Li cheng 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 Zhe 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.ma L.L.ma x.H.ma j.R.mao Z.min W.mitthumsiri H.j.mu y.c.Nan A.Neronov L.j.Ou p.pattarakijwanich Z.y.pei j.c.Qi m.y.Qi B.Q.Qiao j.j.Qin A.Raza D.Ruffolo A.sáiz m.saeed D.semikoz L.shao O.shchegolev x.D.sheng F.W.shu 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 Zhen Wang Zheng Wang D.m.Wei j.j.Wei y.j.Wei T.Wen c.y.Wu H.R.Wu Q.W.Wu s.Wu x.F.Wu y.s.Wu 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.zeng T.x.zeng W.zeng m.Zha B.B.zhang F.zhang H.zhang 不详 Key Laboratory of particle Astrophysics&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 ChengduChina Dublin Institute for Advanced studies 31 Fitzwilliam Place2 DublinIreland max-planck-Institut for Nuclear physics P.O.Box 103980Heidelberg 69029Germany 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 Tsung-Dao Lee Institute&school of physics and Astronomy Shanghai Jiao Tong UniversityShanghai 200240China Institute for Nuclear Research of Russian Academy of sciences Moscow 117312Russia Hebei Normal University Shijiazhuang 050024China University of science and Technology of china Hefei 230026China state Key Laboratory of particle Detection and electronics China Key Laboratory of Dark matter and space Astronomy&Key Laboratory of Radio Astronomy Purple Mountain ObservatoryChinese Academy of SciencesNanjing 210023China Research center for Astronomical computing Zhejiang LaboratoryHangzhou 311121China Key Laboratory for Research in Galaxies and cosmology Shanghai Astronomical ObservatoryChinese Academy of SciencesShanghai 200030China school of physics and Astronomy Yunnan UniversityKunming 650091China Key Laboratory of cosmic Rays(Tibet University) Ministry of EducationLhasa 850000China 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 510275GuangdongChina Institute of Frontier and Interdisciplinary science Shandong UniversityQingdao 266237China Apc UniversitéParis Cité

Theγ-ray emission from the W51 complex is widely acknowledged to be attributed to the interaction between the cosmic rays(cRs)accelerated by the shock of supernova remnant(sNR)W51c and the dense molecular clouds in the adjacent star-forming region,***,the maximum acceleration capability of W51c for cRs remains *** on observations conducted with the Large High Altitude Air shower Observatory(LHAAsO),we report a significant detection ofγrays emanating from the W51 complex,with energies from 2 to 200 *** LHAAsO measurements,for the first time,extend theγ-ray emission from the W51 complex beyond 100 TeV and reveal a significant spectrum bending at tens of *** combining the"π^(0)-decay bump"featured data from Fermi-LAT,the broadbandγ-ray spectrum of the W51 region can be well-characterized by a simple pp-collision *** observed spectral bending feature suggests an exponential cutoff at~400 TeV or a power-law break at~200 TeV in the cR proton spectrum,most likely providing the first evidence of sNRs serving as cR accelerators approaching the peV ***,two young star clusters within W51B could also be theoretically viable to produce the most energeticγrays observed by *** findings strongly support the presence of extreme cR accelerators within the W51 complex and provide new insights into the origin of Galactic cRs.

关键词： UHe c-ray cosmic rays sNR W51c star clusters

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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： LHAAsO collaboration Zhen cao chuandong Gao cong Li Ruo-yu Liu Ruizhi yang 不详 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 ChengduChina Institute of Frontier and Interdisciplinary science Shandong UniversityQingdao 266237China school of Astronomy and space science Nanjing UniversityNanjing 210023China University of science and Technology of china Hefei 230026China

We report the detection of aγ-ray bubble spanning at least 100deg2 in ultra-high energy(UHe)up to a few peV in the direction of the star-forming region cygnus x,implying the presence super peVatron(s)accelerating protons to at least 10 peV.A log-parabola form with the photon indexΓ(e)=(2.71±0.02)+(0.11±0.02)×log10(e/10 TeV)is found fitting the gamma-ray energy spectrum of the bubble *** sources,“hot spots”correlated with very massive molecular clouds,and a quasi-spherical amorphousγ-ray emitter with a sharp central brightening are observed in the *** the core of~0.5°,spatially associating with a region containing massive OB association(cygnus OB2)and a microquasar(cygnus x-3),as well as previously reported multi-TeV sources,an enhanced concentration of UHeγ-rays is observed with 2 photons at energies above 1 *** general feature of the bubble,the morphology,and the energy spectrum,are reasonably reproduced by the assumption of a particle accelerator in the core,continuously injecting protons into the ambient medium.

关键词： cosmic rays γ-rays Interstellar medium star cluster

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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 Fischer 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.Kabana N.Kalantar-Nayestanaki 康晓琳康晓珅 R.Kappert m.Kavatsyuk 柯百谦 I.K.Keshk A.Khoukaz R.Kiuchi R.Kliemt L.Koch O.B.Kolcu B.Kopf m.Kuemmel m.Kuessner A.Kupsc W.Kühn j.j.Lane 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 Li 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.Libby 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 Hebei 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 jilin 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

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Observations of the cabibbo-suppressed decays Λ_(c)^(+)→nπ+π^(0),nπ^(+)π^(-)π^(+) and the cabibbo-Favored decay Λ_(c)^(+)→nK^(-)π^(+)π^(+)

引用

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 Fischer 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.Keshk A.Khoukaz R.Kiuchi R.Kliemt L.Koch O.B.Kolcu B.Kopf m.Kuemmel m.Kuessner A.Kupsc W.Kühn j.j.Lane 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 Li 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.Libby 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 Hebei 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 jilin 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

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