Production of [Formula: see text] and [Formula: see text] mesons up to high transverse momentum in pp collisions at 2.76 TeV

. 2017 ; 77 (5) : 339. [epub] 20170522

Status PubMed-not-MEDLINE Jazyk angličtina Země Francie Médium print-electronic

Typ dokumentu časopisecké články

Perzistentní odkaz   https://www.medvik.cz/link/pmid28943788

The invariant differential cross sections for inclusive [Formula: see text] and [Formula: see text] mesons at midrapidity were measured in pp collisions at [Formula: see text] TeV for transverse momenta [Formula: see text] GeV/c and [Formula: see text] GeV/c, respectively, using the ALICE detector. This large range in [Formula: see text] was achieved by combining various analysis techniques and different triggers involving the electromagnetic calorimeter (EMCal). In particular, a new single-cluster, shower-shape based method was developed for the identification of high-[Formula: see text] neutral pions, which exploits that the showers originating from their decay photons overlap in the EMCal. Above 4 GeV/[Formula: see text], the measured cross sections are found to exhibit a similar power-law behavior with an exponent of about 6.3. Next-to-leading-order perturbative QCD calculations differ from the measured cross sections by about 30% for the [Formula: see text], and between 30-50% for the [Formula: see text] meson, while generator-level simulations with PYTHIA 8.2 describe the data to better than 10-30%, except at [Formula: see text] GeV/[Formula: see text]. The new data can therefore be used to further improve the theoretical description of [Formula: see text] and [Formula: see text] meson production.

5 Fock Institute for Physics St Petersburg State University St Petersburg Russia

A 1 Alikhanyan National Science Laboratory Foundation Yerevan Armenia

Benemérita Universidad Autónoma de Puebla Puebla Mexico

Bogolyubov Institute for Theoretical Physics Kiev Ukraine

Budker Institute for Nuclear Physics Novosibirsk Russia

California Polytechnic State University San Luis Obispo CA USA

Central China Normal University Wuhan China

Centre de Calcul de l'IN2P3 Villeurbanne Lyon France

Centro de Aplicaciones Tecnológicas y Desarrollo Nuclear Havana Cuba

Centro de Investigación y de Estudios Avanzados Mexico City Mérida Mexico

Centro de Investigaciones Energéticas Medioambientales y Tecnológicas Madrid Spain

Centro Fermi Museo Storico della Fisica e Centro Studi e Ricerche Enrico Fermi' Rome Italy

Chicago State University Chicago IL USA

China Institute of Atomic Energy Beijing China

COMSATS Institute of Information Technology Islamabad Pakistan

Departamento de Física de Partículas and IGFAE Universidad de Santiago de Compostela Santiago de Compostela Spain

Department of Physics Aligarh Muslim University Aligarh India

Department of Physics and Technology University of Bergen Bergen Norway

Department of Physics Centre for Astroparticle Physics and Space Science Bose Institute Kolkata India

Department of Physics Gauhati University Guwahati India

Department of Physics Ohio State University Columbus OH USA

Department of Physics Sejong University Seoul South Korea

Department of Physics University of Oslo Oslo Norway

Dipartimento di Fisica 'E R Caianiello' dell'Università and Gruppo Collegato INFN Salerno Italy

Dipartimento di Fisica dell'Università 'La Sapienza' and Sezione INFN Rome Italy

Dipartimento di Fisica dell'Università and Sezione INFN Cagliari Italy

Dipartimento di Fisica dell'Università and Sezione INFN Trieste Italy

Dipartimento di Fisica dell'Università and Sezione INFN Turin Italy

Dipartimento di Fisica e Astronomia dell'Università and Sezione INFN Bologna Italy

Dipartimento di Fisica e Astronomia dell'Università and Sezione INFN Catania Italy

Dipartimento di Fisica e Astronomia dell'Università and Sezione INFN Padua Italy

Dipartimento di Scienze e Innovazione Tecnologica dell'Università del Piemonte Orientale and INFN Sezione di Torino Alessandria Italy

Dipartimento DISAT del Politecnico and Sezione INFN Turin Italy

Dipartimento Interateneo di Fisica 'M Merlin' and Sezione INFN Bari Italy

Division of Experimental High Energy Physics University of Lund Lund Sweden

European Organization for Nuclear Research Geneva Switzerland

Excellence Cluster Universe Technische Universität München Munich Germany

Faculty of Engineering Bergen University College Bergen Norway

Faculty of Mathematics Physics and Informatics Comenius University Bratislava Slovakia

Faculty of Nuclear Sciences and Physical Engineering Czech Technical University Prague Prague Czech Republic

Faculty of Science P J Šafárik University Kosice Slovakia

Faculty of Technology Buskerud and Vestfold University College Tonsberg Norway

Frankfurt Institute for Advanced Studies Johann Wolfgang Goethe Universität Frankfurt Frankfurt Germany

Gangneung Wonju National University Gangneung South Korea

Helmholtz Institut für Strahlen und Kernphysik Rheinische Friedrich Wilhelms Universität Bonn Bonn Germany

Helsinki Institute of Physics Helsinki Finland

Hiroshima University Hiroshima Japan

Indian Institute of Technology Bombay Mumbai India

Indian Institute of Technology Indore Indore India

Indonesian Institute of Sciences Jakarta Indonesia

Inha University Incheon South Korea

Institut de Physique Nucléaire d'Orsay Université Paris Sud CNRS IN2P3 Orsay France

Institut für Informatik Johann Wolfgang Goethe Universität Frankfurt Frankfurt Germany

Institut für Kernphysik Johann Wolfgang Goethe Universität Frankfurt Frankfurt Germany

Institut für Kernphysik Westfälische Wilhelms Universität Münster Münster Germany

Institute for Nuclear Research Academy of Sciences Moscow Russia

Institute for Subatomic Physics of Utrecht University Utrecht The Netherlands

Institute for Theoretical and Experimental Physics Moscow Russia

Institute of Experimental Physics Slovak Academy of Sciences Kosice Slovakia

Institute of Physics Academy of Sciences of the Czech Republic Prague Czech Republic

Institute of Physics Bhubaneswar India

Institute of Space Science Bucharest Romania

Instituto de Ciencias Nucleares Universidad Nacional Autónoma de México Mexico City Mexico

Instituto de Física Universidad Nacional Autónoma de México Mexico City Mexico

Instituto de Física Universidade Federal do Rio Grande do Sul Porto Alegre Brazil

IRFU CEA Université Paris Saclay 91191 Gif sur Yvette France Saclay France

iThemba LABS National Research Foundation Somerset West South Africa

Joint Institute for Nuclear Research Dubna Russia

Konkuk University Seoul South Korea

Korea Institute of Science and Technology Information Taejeon South Korea

KTO Karatay University Konya Turkey

Laboratoire de Physique Corpusculaire Clermont Université Université Blaise Pascal CNRS IN2P3 Clermont Ferrand France

Laboratoire de Physique Subatomique et de Cosmologie Université Grenoble Alpes CNRS IN2P3 Grenoble France

Laboratori Nazionali di Frascati INFN Frascati Italy

Laboratori Nazionali di Legnaro INFN Legnaro Italy

Lawrence Berkeley National Laboratory Berkeley CA USA

Moscow Engineering Physics Institute Moscow Russia

Nagasaki Institute of Applied Science Nagasaki Japan

National Centre for Nuclear Studies Warsaw Poland

National Institute for Physics and Nuclear Engineering Bucharest Romania

National Institute of Science Education and Research Bhubaneswar India

National Nuclear Research Center Baku Azerbaijan

National Research Centre Kurchatov Institute Moscow Russia

Niels Bohr Institute University of Copenhagen Copenhagen Denmark

Nikhef Nationaal instituut voor subatomaire fysica Amsterdam The Netherlands

Nuclear Physics Group STFC Daresbury Laboratory Daresbury UK

Nuclear Physics Institute Academy of Sciences of the Czech Republic Řež u Prahy Czech Republic

Oak Ridge National Laboratory Oak Ridge TN USA

Petersburg Nuclear Physics Institute Gatchina Russia

Physics Department Creighton University Omaha NE USA

Physics Department National and Kapodistrian University of Athens Athens Greece

Physics Department Panjab University Chandigarh India

Physics Department The University of Texas at Austin Austin TX USA

Physics Department University of Cape Town Cape Town South Africa

Physics Department University of Jammu Jammu India

Physics Department University of Rajasthan Jaipur India

Physik Department Technische Universität München Munich Germany

Physikalisches Institut Eberhard Karls Universit?t Tübingen Tübingen Germany

Physikalisches Institut Ruprecht Karls Universität Heidelberg Heidelberg Germany

Purdue University West Lafayette IN USA

Pusan National University Pusan South Korea

Research Division and ExtreMe Matter Institute EMMI GSI Helmholtzzentrum für Schwerionenforschung GmbH Darmstadt Germany

Rudjer Bošković Institute Zagreb Croatia

Russian Federal Nuclear Center Sarov Russia

Saha Institute of Nuclear Physics Kolkata India

School of Physics and Astronomy University of Birmingham Birmingham UK

Sección Física Departamento de Ciencias Pontificia Universidad Católica del Perú Lima Peru

Sezione INFN Bari Italy

Sezione INFN Bologna Italy

Sezione INFN Cagliari Italy

Sezione INFN Catania Italy

Sezione INFN Padua Italy

Sezione INFN Rome Italy

Sezione INFN Trieste Italy

Sezione INFN Turin Italy

SSC IHEP of NRC Kurchatov institute Protvino Russia

Stefan Meyer Institut für Subatomare Physik Vienna Austria

SUBATECH IMT Atlantique Université de Nantes CNRS IN2P3 Nantes France

Suranaree University of Technology Nakhon Ratchasima Thailand

Technical University of Košice Kosice Slovakia

Technical University of Split FESB Split Croatia

The Henryk Niewodniczanski Institute of Nuclear Physics Polish Academy of Sciences Kraców Poland

Universidad Autónoma de Sinaloa Culiacán Mexico

Universidade de São Paulo São Paulo Brazil

Universidade Estadual de Campinas Campinas Brazil

Universidade Federal do ABC Santo Andre Brazil

Università degli Studi di Pavia Pavia Italy

Università di Brescia Brescia Italy

Université de Lyon Université Lyon 1 CNRS IN2P3 IPN Lyon Villeurbanne Lyon France

Université de Strasbourg CNRS IPHC UMR 7178 67000 Strasbourg France

University of Houston Houston TX USA

University of Jyväskylä Jyväskylä Finland

University of Liverpool Liverpool UK

University of Tennessee Knoxville TN USA

University of the Witwatersrand Johannesburg South Africa

University of Tokyo Tokyo Japan

University of Tsukuba Tsukuba Japan

University of Zagreb Zagreb Croatia

Variable Energy Cyclotron Centre Kolkata India

Warsaw University of Technology Warsaw Poland

Wayne State University Detroit MI USA

Wigner Research Centre for Physics Hungarian Academy of Sciences Budapest Hungary

Yale University New Haven CT USA

Yonsei University Seoul South Korea

Zentrum für Technologietransfer und Telekommunikation Fachhochschule Worms Worms Germany

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