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作者机构:Variable Energy Cyclotron Centre Kolkata India Department of Physics University of California Berkeley California United States Nuclear Physics Institute of the Czech Academy of Sciences Řež u Prahy Czech Republic Lund University Department of Physics Division of Particle Physics Lund Sweden Physics Department Panjab University Chandigarh India European Organization for Nuclear Research (CERN) Geneva Switzerland Dipartimento DISAT del Politecnico and Sezione INFN Turin Italy Indian Institute of Technology Bombay (IIT) Mumbai India Korea Institute of Science and Technology Information Daejeon Republic of Korea Yale University New Haven Connecticut USA Institute for Theoretical and Experimental Physics Moscow Russia Research Division and ExtreMe Matter Institute EMMI GSI Helmholtzzentrum für Schwerionenforschung GmbH Darmstadt Germany Universidade Estadual de Campinas (UNICAMP) Campinas Brazil National Research Centre Kurchatov Institute Moscow Russia INFN Sezione di Torino Turin Italy Instituto de Física Universidad Nacional Autónoma de México Mexico City Mexico COMSATS Institute of Information Technology (CIIT) Islamabad Pakistan Dipartimento di Fisica e Astronomia dell'Università and Sezione INFN Bologna Italy Centro Fermi - Museo Storico della Fisica e Centro Studi e Ricerche “Enrico Fermi” Rome Italy INFN Sezione di Bologna Bologna Italy Bogolyubov Institute for Theoretical Physics National Academy of Sciences of Ukraine Kiev Ukraine Department of Physics and Technology University of Bergen Bergen Norway Institut für Kernphysik Johann Wolfgang Goethe-Universität Frankfurt Frankfurt Germany V. Fock Institute for Physics St. Petersburg State University St. Petersburg Russia Horia Hulubei National Institute of Physics and Nuclear Engineering Bucharest Romania School of Physics and Astronomy University of Birmingham Birmingham United Kingdom Physikalisches Institut Ruprecht-Karls-Universität Heidelberg Heidelberg Germany Creighton University Omaha Nebraska United States Rudjer Bošković Institute Zagreb Croatia INFN Sezione di Padova Padova Italy Lawrence Berkeley National Laboratory Berkeley California USA SUBATECH IMT Atlantique Université de Nantes CNRS-IN2P3 Nantes France Physik Department Technische Universität München Munich Germany Technische Universität München Excellence Cluster “Universe” Munich Germany Department of Physics University of Oslo Oslo Norway Department of Physics Aligarh Muslim University Aligarh India INFN Sezione di Catania Catania Italy Inha University Incheon Republic of Korea Konkuk University Seoul Republic of Korea Physics Department University of Jammu Jammu India Université Paris-Saclay Centre dÉtudes de Saclay (CEA) IRFU Department de Physique Nucléaire (DPhN) Saclay France Helmholtz-Institut für Strahlen- und Kernphysik Rheinische Friedrich-Wilhelms-Universität Bonn Bonn Germany Institute of Physics Bhubaneswar India National Institute of Science Education and Research HBNI Jatni India Dipartimento di Fisica dell'Università and Sezione INFN Turin Italy Dipartimento di Fisica e Astronomia dell'Università and Sezione INFN Catania Italy Dipartimento Interateneo di Fisica ‘M. Merlin’ and Sezione INFN Bari Italy Wigner Research Centre for Physics Hungarian Academy of Sciences Budapest Hungary Nuclear Physics Group STFC Daresbury Laboratory Daresbury United Kingdom Université Clermont Auvergne CNRS/IN2P3 LPC Clermont-Ferrand France Central China Normal University Wuhan China Wayne State University Detroit Michigan USA Joint Institute for Nuclear Research (JINR) Dubna Russia Sección Física Departamento de Ciencias Pontificia Universidad Católica del Perú Lima Peru Niels Bohr Institute University of Copenhagen Copenhagen Denmark Institute for Subatomic Physics of Utrecht University Utrecht Netherlands Université de Strasbourg CNRS IPHC UMR 7178 F-67000 Strasbourg France Strasbourg France Benemérita Universidad Autónoma de Puebla Puebla Mexico University of Houston Houston Texas USA Universidad Autónoma de Sinaloa Culiacán Mexico NRNU Moscow Engineering Physics Institute Moscow Russia Petersburg Nuclear Physics Institute Gatchina Russia University of Tennessee Knoxville Tennessee USA Gauhati University Department of Physics Guwahati India The Henryk Niewodniczanski Institute of Nuclear Physics Polish Academy of Sciences Cracow Poland INFN Laboratori Nazionali di Frascati Frascati Italy Faculty of Nuclear Sciences and Physical Engineering Czech Technical University in Prague Prague Czech Republic Bose Institute Department of Physics and Centre for Astroparticle Physics and Space Science (CAPSS) Kolkata India The University of Texas at Austin Austin Texas USA Università degli Studi di Pavia Pavia Italy Faculty of Science P. J. Šafárik University Košice Slovakia Università di Brescia Brescia Italy Department of Physics Pusan National University Pusan Republic of Korea University of Liverpool Liverpool United Kingdom Universidade de São Paulo (USP) São Paulo Brazil Helsinki Institute of Physics (HIP) Helsinki Finland Russian Federal Nuclear Center (VNIIEF) Sarov Russia Stefan Meyer Institut für Subatomare Physik (SMI) Vienna Austria University of Tsukuba Tsukuba Japan iThemba LABS National Research Foundation Somerset West South Africa Department of Physics Ohio State University Columbus Ohio United States Technical University of Košice Košice Slovakia Nikhef National institute for subatomic physics Amsterdam Netherlands Dipartimento di Fisica dell'Università and Sezione INFN Trieste Italy INFN Sezione di Cagliari Cagliari Italy Centro de Aplicaciones Tecnológicas y Desarrollo Nuclear (CEADEN) Havana Cuba University of Jyväskylä Jyväskylä Finland Saha Institute of Nuclear Physics Kolkata India Université de Lyon Université Lyon 1 CNRS/IN2P3 IPN-Lyon Villeurbanne Lyon France University of Cape Town Cape Town South Africa INFN Sezione di Bari Bari Italy Institute of Experimental Physics Slovak Academy of Sciences Košice Slovakia Laboratoire de Physique Subatomique et de Cosmologie Université Grenoble-Alpes CNRS-IN2P3 Grenoble France Institut de Physique Nucléaire d'Orsay (IPNO) Institut National de Physique Nucléaire et de Physique des Particules (IN2P3/CNRS) Université de Paris-Sud Université Paris-Saclay Orsay France Oak Ridge National Laboratory Oak Ridge Tennessee USA Dipartimento di Scienze e Innovazione Tecnologica dell'Università del Piemonte Orientale and INFN Sezione di Torino Alessandria Italy Universidade Federal do ABC Santo Andre Brazil Instituto de Ciencias Nucleares Universidad Nacional Autónoma de México Mexico City Mexico Westfälische Wilhelms-Universität Münster Institut für Kernphysik Münster Germany Institute of Space Science (ISS) Bucharest Romania Indian Institute of Technology Indore Indore India Dipartimento di Fisica “E. R. Caianiello” dell'Università and Gruppo Collegato INFN Salerno Italy Frankfurt Institute for Advanced Studies Johann Wolfgang Goethe-Universität Frankfurt Frankfurt Germany Dipartimento di Fisica dell'Università and Sezione INFN Cagliari Italy National Centre for Nuclear Research Warsaw Poland Johann-Wolfgang-Goethe Universität Frankfurt Institut für Informatik Fachbereich Informatik und Mathematik Frankfurt Germany Physics department Faculty of science University of Zagreb Zagreb Croatia NRC Kurchatov Institute IHEP Protvino Russia Dipartimento di Fisica e Astronomia dell'Università and Sezione INFN Padova Italy Institute for Nuclear Research Academy of Sciences Moscow Russia INFN Sezione di Trieste Trieste Italy National and Kapodistrian University of Athens School of Science Department of Physics Athens Greece Chicago State University Chicago Illinois United States Instituto de Física Universidade Federal do Rio Grande do Sul (UFRGS) Porto Alegre Brazil University of Split Faculty of Electrical Engineering Mechanical Engineering and Naval Architecture Split Croatia Warsaw University of Technology Warsaw Poland A. I. Alikhanyan National Science Laboratory (Yerevan Physics Institute) Foundation Yerevan Armenia University of Tokyo Tokyo Japan Nagasaki Institute of Applied Science Nagasaki Japan Faculty of Engineering and Business Administration Western Norway University of Applied Sciences Bergen Norway Centro de Investigación y de Estudios Avanzados (CINVESTAV) Mexico City and Mérida Mexico Physikalisches Institut Eberhard-Karls-Universität Tübingen Tübingen Germany Department of Physics Sejong University Seoul Republic of Korea Yonsei University Seoul Republic of Korea KTO Karatay University Konya Turkey Hochschule Worms Zentrum für Technologietransfer und Telekommunikation (ZTT) Worms Germany Chonbuk National University Jeonju Republic of Korea Gangneung-Wonju National University Gangneung Republic of Korea California Polytechnic State University San Luis Obispo California USA Suranaree University of Technology Nakhon Ratchasima Thailand University College of Southeast Norway Tonsberg Norway China Institute of Atomic Energy Beijing China University of the Witwatersrand Johannesburg South Africa Institute of Physics of the Czech Academy of Sciences Prague Czech Republic INFN Sezione di Roma Rome Italy Dipartimento di Fisica dell'Università “La Sapienza” and Sezione INFN Rome Italy Comenius University Bratislava Faculty of Mathematics Physics and Informatics Bratislava Slovakia Hiroshima University Hiroshima Japan Budker Institute for Nuclear Physics Novosibirsk Russia Physics Department University of Rajasthan Jaipur India National Nuclear Research Center Baku Azerbaijan Nara Women's University (NWU) Nara Japan Indonesian Institute of Sciences Jakarta Indonesia Centre de Calcul de l'IN2P3 Villeurbanne Lyon France
出 版 物:《Physical Review C》 (物理学评论C辑:核物理学)
年 卷 期:2018年第98卷第4期
页 面:044901-044901页
核心收录:
学科分类:07[理学] 070202[理学-粒子物理与原子核物理] 0702[理学-物理学]
基 金:Council of Scientific and Industrial Research, India, CSIR State Committee of Science and World Federation Ministry of Communications and High Technologies Department of Atomic Energy, Government of India, DAE National Academy of Sciences of Ukraine, NASU National Science and Technology Development Agency, สวทช National Research Foundation of Korea, NRF Ministry of Education of the People's Republic of China, MOE Narodowe Centrum Nauki, NCN University Grants Commission, UGC Institut National de Physique Nucléaire et de Physique des Particules, IN2P3 General Secretariat for Research and Technology, Ministry of Education, Research and Religions Institute for Innovative Science and Technology, Nagasaki Institute of Applied Science, IIST Nederlandse Organisatie voor Wetenschappelijk Onderzoek, NWO Turkish Atomic Energy Agency Korea Institute of Science and Technology Information, KISTI Knut och Alice Wallenbergs Stiftelse Austrian Academy of Sciences and Nationalstiftung für Forschung, Technologie und Entwicklung Instituto Nazionale di Fisica Nucleare, INFN Financiadora de Estudos e Projetos, FINEP Department of Science and Technology, Ministry of Science and Technology, India, डीएसटी Consejo Nacional de Ciencia y Tecnología, CONACYT Helsinki Institute of Physics Türkiye Atom Enerjisi Kurumu, TAEK Norges Forskningsråd Yerevan Physics Institute Natur og Univers, Det Frie Forskningsråd, FNU, DFF Centre National de la Recherche Scientifique, CNRS Office of the Higher Education Commission, OHEC Dirección General de Asuntos del Personal Académico, Universidad Nacional Autónoma de México, DGAPA, UNAM Bundesministerium für Bildung und Forschung, BMBF Commissariat à l'Énergie Atomique et aux Énergies Alternatives, CEA Danmarks Grundforskningsfond, DNRF Conselho Nacional de Desenvolvimento Científico e Tecnológico, CNPq Centro Fermi - Museo Storico della Fisica e Centro Studi e Ricerche Enrico Fermi and Istituto Nazionale di Fisica Nucleare Suranaree University of Technology, SUT Nemzeti Kutatási Fejlesztési és Innovációs Hivatal, NKFIH NRU GSI Helmholtzzentrum für Schwerionenforschung, GSI U.S. Department of Energy, USDOE Ministry of Education and Science of the Russian Federation, Minobrnauka Carlsbergfondet Indian Institute of Space Science and Technology, IIST Ministry of Science, Education and Sport and Croatian Science Foundation Fundação de Amparo à Pesquisa do Estado de São Paulo, FAPESP National Nuclear Research Center National Research Center "Kurchatov Institute", NRC KI Ministry of Science and Technology of the People's Republic of China, MOST Ministry of Education, Youth and Sports of the Czech Republic, Czech Republic Ministry of Education, Science, Research and Sport Institute of Atomic Physics and Romanian National Agency for Science, Technology and Innovation, Romania Fondo de Cooperación Internacional en Ciencia y Tecnología, FONCICYT Universidade Federal do Rio Grande do Sul, UFRGS Indonesian Institute of Science, Indonesia University Grants Commission, Government of India National Research Foundation, NRF Ministerstwo Edukacji i Nauki, MNiSW Ministry of Higher Education and Scientific Research, MHE&SR CERN Joint Institute for Nuclear Research, JINR Nuclear Physics, NP Vetenskapsrådet, VR Ministry of Education, Culture, Sports, Science and Technology, MEXT National Natural Science Foundation of China, NSFC , (ST/P005438/1, ST/M001598/1, ST/P005047/1, 1843572, ST/P004598/1, ST/P004199/1, ST/L005670/1, ST/M00158X/1, ST/N00261X/1, 1796881, ST/L005751/1, ST/M00340X/1, 1657698, ALICE) Japan Society for the Promotion of Science, JSPS, (18H05401, 15H03664, 16K17701, 17H01122, 26220707) Japan Society for the Promotion of Science, JSPS
主 题:Nuclear reactions Relativistic heavy-ion collisions
摘 要:Neutral pion and η meson production in the transverse momentum range 1 pT 20 GeV/c have been measured at midrapidity by the ALICE experiment at the Large Hadron Collider (LHC) in central and semicentral Pb-Pb collisions at sNN = 2.76 TeV. These results were obtained using the photon conversion method as well as the Photon Spectrometer (PHOS) and Electromagnetic Calorimeter detectors. The results extend the upper pT reach of the previous ALICE π0 measurements from 12 to 20 GeV/c and present the first measurement of η meson production in heavy-ion collisions at the LHC. The η/π0 ratio is similar for the two centralities and reaches at high pT a plateau value of 0.457 ± 0.013stat ± 0.018syst. A suppression of similar magnitude for π0 and η meson production is observed in Pb-Pb collisions with respect to their production in pp collisions scaled by the number of binary nucleon-nucleon collisions. We discuss the results in terms of Next to Leading Order (NLO) pQCD predictions and hydrodynamic models. The measurements show a stronger suppression than observed at lower center-of-mass energies in the pT range 6 pT 10 GeV/c. For pT 3 GeV/c, hadronization models describe the π0 results while for the η some tension is observed.