Measurement of the [Formula: see text] production cross-section using [Formula: see text] events with [Formula: see text]-tagged jets in [Formula: see text] collisions at [Formula: see text] and 8 TeV with the ATLAS detector

. 2014 ; 74 (10) : 3109. [epub] 20141029

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

Typ dokumentu časopisecké články

Perzistentní odkaz   https://www.medvik.cz/link/pmid25814872

The inclusive top quark pair ([Formula: see text]) production cross-section [Formula: see text] has been measured in proton-proton collisions at [Formula: see text] and [Formula: see text] with the ATLAS experiment at the LHC, using [Formula: see text] events with an opposite-charge [Formula: see text] pair in the final state. The measurement was performed with the 2011 7 TeV dataset corresponding to an integrated luminosity of 4.6 [Formula: see text] and the 2012 8 TeV dataset of 20.3 [Formula: see text]. The numbers of events with exactly one and exactly two [Formula: see text]-tagged jets were counted and used to simultaneously determine [Formula: see text] and the efficiency to reconstruct and [Formula: see text]-tag a jet from a top quark decay, thereby minimising the associated systematic uncertainties. The cross-section was measured to be: [Formula: see text]where the four uncertainties arise from data statistics, experimental and theoretical systematic effects, knowledge of the integrated luminosity and of the LHC beam energy. The results are consistent with recent theoretical QCD calculations at next-to-next-to-leading order. Fiducial measurements corresponding to the experimental acceptance of the leptons are also reported, together with the ratio of cross-sections measured at the two centre-of-mass energies. The inclusive cross-section results were used to determine the top quark pole mass via the dependence of the theoretically predicted cross-section on [Formula: see text] giving a result of [Formula: see text][Formula: see text] GeV. By looking for an excess of [Formula: see text] production with respect to the QCD prediction, the results were also used to place limits on the pair-production of supersymmetric top squarks [Formula: see text] with masses close to the top quark mass, decaying via [Formula: see text] to predominantly right-handed top quarks and a light neutralino [Formula: see text], the lightest supersymmetric particle. Top squarks with masses between the top quark mass and 177 GeV are excluded at the 95 % confidence level.

2 Physikalisches Institut Georg August Universität Göttingen Germany

2 Physikalisches Institut Justus Liebig Universität Giessen Giessen Germany

Albert Einstein Center for Fundamental Physics and Laboratory for High Energy Physics University of Bern Bern Switzerland

B 1 Stepanov Institute of Physics National Academy of Sciences of Belarus Minsk Republic of Belarus

Budker Institute of Nuclear Physics SB RAS Novosibirsk Russia

Cavendish Laboratory University of Cambridge Cambridge UK

Center for High Energy Physics University of Oregon Eugene OR USA

Centre de Calcul de l'Institut National de Physique Nucléaire et de Physique des Particules Villeurbanne France

Centro de Investigaciones Universidad Antonio Narino Bogotá Colombia

CERN Geneva Switzerland

CPPM Aix Marseille Université and CNRS IN2P3 Marseille France

Czech Technical University Prague Prague Czech Republic

D 5 Skobeltsyn Institute of Nuclear Physics M 5 Lomonosov Moscow State University Moscow Russia

Departamento de Física Pontificia Universidad Católica de Chile Santiago Chile; Departamento de Física Universidad Técnica Federico Santa María Valparaiso Chile

Departamento de Fisica Teorica C 15 Universidad Autonoma de Madrid Madrid Spain

Departamento de Física Universidad de Buenos Aires Buenos Aires Argentina

Department for Physics and Technology University of Bergen Bergen Norway

Department of Particle Physics The Weizmann Institute of Science Rehovot Israel

Department of Physics and Astronomy Iowa State University Ames IA USA

Department of Physics and Astronomy Michigan State University East Lansing MI USA

Department of Physics and Astronomy Tufts University Medford MA USA

Department of Physics and Astronomy University College London London UK

Department of Physics and Astronomy University of California Irvine Irvine CA USA

Department of Physics and Astronomy University of New Mexico Albuquerque NM USA

Department of Physics and Astronomy University of Pittsburgh Pittsburgh PA USA

Department of Physics and Astronomy University of Sheffield Sheffield UK

Department of Physics and Astronomy University of Sussex Brighton UK

Department of Physics and Astronomy University of Uppsala Uppsala Sweden

Department of Physics and Astronomy University of Victoria Victoria BC Canada

Department of Physics Ankara University Ankara Turkey; Department of Physics Gazi University Ankara Turkey; Division of Physics TOBB University of Economics and Technology Ankara Turkey; Turkish Atomic Energy Authority Ankara Turkey

Department of Physics Aristotle University of Thessaloniki Thessaloniki Greece

Department of Physics Bogazici University Istanbul Turkey; Department of Physics Dogus University Istanbul Turkey; Department of Physics Engineering Gaziantep University Gaziantep Turkey

Department of Physics Boston University Boston MA USA

Department of Physics Brandeis University Waltham MA USA

Department of Physics Carleton University Ottawa ON Canada

Department of Physics Duke University Durham NC USA

Department of Physics Hampton University Hampton VA USA

Department of Physics Humboldt University Berlin Germany

Department of Physics Indiana University Bloomington IN USA

Department of Physics Jožef Stefan Institute and University of Ljubljana Ljubljana Slovenia

Department of Physics Kyushu University Fukuoka Japan

Department of Physics Massachusetts Institute of Technology Cambridge MA USA

Department of Physics McGill University Montreal QC Canada

Department of Physics New York University New York NY USA

Department of Physics Northern Illinois University DeKalb IL USA

Department of Physics Oklahoma State University Stillwater OK USA

Department of Physics Oxford University Oxford UK

Department of Physics Royal Holloway University of London Surrey UK

Department of Physics Shinshu University Nagano Japan

Department of Physics Simon Fraser University Burnaby BC Canada

Department of Physics Stockholm University Stockholm Sweden; The Oskar Klein Centre Stockholm Sweden

Department of Physics Technion Israel Institute of Technology Haifa Israel

Department of Physics The University of Michigan Ann Arbor MI USA

Department of Physics The University of Texas at Arlington Arlington TX USA

Department of Physics Tokyo Institute of Technology Tokyo Japan

Department of Physics University of Adelaide Adelaide Australia

Department of Physics University of Alberta Edmonton AB Canada

Department of Physics University of Arizona Tucson AZ USA

Department of Physics University of British Columbia Vancouver BC Canada

Department of Physics University of Cape Town Cape Town South Africa; Department of Physics University of Johannesburg Johannesburg South Africa; School of Physics University of the Witwatersrand Johannesburg South Africa

Department of Physics University of Illinois Urbana IL USA

Department of Physics University of Massachusetts Amherst MA USA

Department of Physics University of Oslo Oslo Norway

Department of Physics University of Pennsylvania Philadelphia PA USA

Department of Physics University of Toronto Toronto ON Canada

Department of Physics University of Warwick Coventry UK

Department of Physics University of Washington Seattle WA USA

Department of Physics University of Wisconsin Madison WI USA

Department of Physics Yale University New Haven CT USA

Departments of Physics and Astronomy and Chemistry Stony Brook University Stony Brook NY USA

DESY Hamburg and Zeuthen Germany

DSM IRFU Gif sur Yvette France

E Andronikashvili Institute of Physics Iv Javakhishvili Tbilisi State University Tbilisi Georgia; High Energy Physics Institute Tbilisi State University Tbilisi Georgia

Enrico Fermi Institute University of Chicago Chicago IL USA

Fachbereich C Physik Bergische Universität Wuppertal Wuppertal Germany

Fachbereich Physik Universität Siegen Siegen Germany

Faculté des Sciences Ain Chock Réseau Universitaire de Physique des Hautes Energies Université Hassan 2 Casablanca Morocco; Centre National de l'Energie des Sciences Techniques Nucleaires Rabat Morocco; Faculté des Sciences Semlalia Université Cadi Ayyad LPHEA Marrakech Marrakech Morocco; Faculté des Sciences Université Mohamed Premier and LPTPM Oujda Morocco; Faculté des Sciences Université Mohammed 5 Agdal Rabat Morocco

Faculty of Applied Information Science Hiroshima Institute of Technology Hiroshima Japan

Faculty of Mathematics and Physics Charles University Prague Prague Czech Republic

Faculty of Mathematics Physics and Informatics Comenius University Bratislava Slovak Republic; Department of Subnuclear Physics Institute of Experimental Physics of the Slovak Academy of Sciences Kosice Slovak Republic

Faculty of Physics and Applied Computer Science AGH University of Science and Technology Kraków Poland; Marian Smoluchowski Institute of Physics Jagiellonian University Kraków Poland

Faculty of Pure and Applied Sciences University of Tsukuba Tsukuba Japan

Faculty of Science Kyoto University Kyoto Japan

Faculty of Science Okayama University Okayama Japan

Fakultät für Mathematik und Physik Albert Ludwigs Universität Freiburg Germany

Fakultät für Physik Ludwig Maximilians Universität München Munich Germany

Fakultät für Physik und Astronomie Julius Maximilians Universität Würzburg Germany

Fysiska institutionen Lunds universitet Lund Sweden

Graduate School of Science and Kobayashi Maskawa Institute Nagoya University Nagoya Japan

Graduate School of Science and Technology Tokyo Metropolitan University Tokyo Japan

Graduate School of Science Kobe University Kobe Japan

Graduate School of Science Osaka University Osaka Japan

Group of Particle Physics University of Montreal Montreal QC Canada

High Energy Physics Division Argonne National Laboratory Argonne IL USA

Homer L Dodge Department of Physics and Astronomy University of Oklahoma Norman OK USA

INFN Gruppo Collegato di Cosenza Laboratori Nazionali di Frascati Frascati Italy; Dipartimento di Fisica Università della Calabria Rende Italy

INFN Gruppo Collegato di Udine Sezione di Trieste Udine Italy; ICTP Trieste Italy; Dipartimento di Chimica Fisica e Ambiente Università di Udine Udine Italy

INFN Laboratori Nazionali di Frascati Frascati Italy

INFN Sezione di Bologna Bologna Italy; Dipartimento di Fisica e Astronomia Università di Bologna Bologna Italy

INFN Sezione di Genova Genoa Italy; Dipartimento di Fisica Università di Genova Genoa Italy

INFN Sezione di Lecce Lecce Italy; Dipartimento di Matematica e Fisica Università del Salento Lecce Italy

INFN Sezione di Milano Milan Italy; Dipartimento di Fisica Università di Milano Milan Italy

INFN Sezione di Napoli Naples Italy; Dipartimento di Fisica Università di Napoli Naples Italy

INFN Sezione di Pavia Pavia Italy; Dipartimento di Fisica Università di Pavia Pavia Italy

INFN Sezione di Pisa Pisa Italy; Dipartimento di Fisica E Fermi Università di Pisa Pisa Italy

INFN Sezione di Roma Rome Italy; Dipartimento di Fisica Sapienza Università di Roma Rome Italy

INFN Sezione di Roma Tor Vergata Rome Italy; Dipartimento di Fisica Università di Roma Tor Vergata Rome Italy

INFN Sezione di Roma Tre Rome Italy; Dipartimento di Matematica e Fisica Università Roma Tre Rome Italy

Institut de Física d'Altes Energies and Departament de Física de la Universitat Autònoma de Barcelona Barcelona Spain

Institut für Astro und Teilchenphysik Leopold Franzens Universität Innsbruck Austria

Institut für Experimentelle Physik 4 Technische Universität Dortmund Dortmund Germany

Institut für Kern und Teilchenphysik Technische Universität Dresden Dresden Germany

Institut für Physik Universität Mainz Mainz Germany

Institute for Mathematics Astrophysics and Particle Physics Radboud University Nijmegen Nikhef Nijmegen The Netherlands

Institute for Theoretical and Experimental Physics Moscow Russia

Institute of High Energy Physics Chinese Academy of Sciences Beijing China; Department of Modern Physics University of Science and Technology of China Hefei Anhui China; Department of Physics Nanjing University Nanjing Jiangsu China; School of Physics Shandong University Jinan Shandong China; Physics Department Shanghai Jiao Tong University Shanghai China

Institute of Physics Academia Sinica Taipei Taiwan

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

Institute of Physics Azerbaijan Academy of Sciences Baku Azerbaijan

Institute of Physics University of Belgrade Belgrade Serbia; Vinca Institute of Nuclear Sciences University of Belgrade Belgrade Serbia

Instituto de Física Corpuscular University of Valencia and CSIC Valencia Spain

Instituto de Física La Plata Universidad Nacional de La Plata and CONICET La Plata Argentina

International Center for Elementary Particle Physics and Department of Physics The University of Tokyo Tokyo Japan

Joint Institute for Nuclear Research JINR Dubna Dubna Russia

KEK High Energy Accelerator Research Organization Tsukuba Japan

Kirchhoff Institut für Physik Ruprecht Karls Universität Heidelberg Heidelberg Germany; Physikalisches Institut Ruprecht Karls Universität Heidelberg Heidelberg Germany; ZITI Institut für technische Informatik Ruprecht Karls Universität Heidelberg Mannheim Germany

Kyoto University of Education Kyoto Japan

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

Laboratoire de Physique Nucléaire et de Hautes Energies UPMC and Université Paris Diderot and CNRS IN2P3 Paris France

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

Laboratorio de Instrumentacao e Fisica Experimental de Particulas LIP Lisbon Portugal; Faculdade de Ciências Universidade de Lisboa Lisbon Portugal; Department of Physics University of Coimbra Coimbra Portugal; Centro de Física Nuclear da Universidade de Lisboa Lisbon Portugal; Departamento de Fisica Universidade do Minho Braga Portugal; Departamento de Fisica Teorica y del Cosmos and CAFPE Universidad de Granada Granada Spain; Dep Fisica and CEFITEC of Faculdade de Ciencias e Tecnologia Universidade Nova de Lisboa Caparica Portugal

Laboratory for Particle Physics and Cosmology Harvard University Cambridge MA USA

LAL Université Paris Sud and CNRS IN2P3 Orsay France

LAPP CNRS IN2P3 and Université de Savoie Annecy le Vieux France

Louisiana Tech University Ruston LA USA

Max Planck Institut für Physik Munich Germany

Moscow Engineering and Physics Institute Moscow Russia

Nagasaki Institute of Applied Science Nagasaki Japan

National Institute of Physics and Nuclear Engineering Bucharest Romania; Physics Department National Institute for Research and Development of Isotopic and Molecular Technologies Cluj Napoca Romania; University Politehnica Bucharest Bucharest Romania; West University in Timisoara Timisoara Romania

National Scientific and Educational Centre for Particle and High Energy Physics Minsk Republic of Belarus

Nevis Laboratory Columbia University Irvington NY USA

Niels Bohr Institute University of Copenhagen Copenhagen Denmark

Nikhef National Institute for Subatomic Physics and University of Amsterdam Amsterdam The Netherlands

Ohio State University Columbus OH USA

Oliver Lodge Laboratory University of Liverpool Liverpool UK

P N Lebedev Institute of Physics Academy of Sciences Moscow Russia

Palacký University RCPTM Olomouc Czech Republic

Particle Physics Department Rutherford Appleton Laboratory Didcot UK

Petersburg Nuclear Physics Institute Gatchina Russia

Physics Department Brookhaven National Laboratory Upton NY USA

Physics Department Lancaster University Lancaster UK

Physics Department National Technical University of Athens Zografou Athens Greece

Physics Department Royal Institute of Technology Stockholm Sweden

Physics Department Southern Methodist University Dallas TX USA

Physics Department SUNY Albany Albany NY USA

Physics Department University of Athens Athens Greece

Physics Department University of Regina Regina SK Canada

Physics Department University of Texas at Dallas Richardson TX USA

Physics Division Lawrence Berkeley National Laboratory and University of California Berkeley CA USA

Physikalisches Institut University of Bonn Bonn Germany

Raymond and Beverly Sackler School of Physics and Astronomy Tel Aviv University Tel Aviv Israel

Ritsumeikan University Kusatsu Shiga Japan

Santa Cruz Institute for Particle Physics University of California Santa Cruz Santa Cruz CA USA

School of Physics and Astronomy Queen Mary University of London London UK

School of Physics and Astronomy University of Birmingham Birmingham UK

School of Physics and Astronomy University of Manchester Manchester UK

School of Physics University of Melbourne Parkville VIC Australia

School of Physics University of Sydney Sydney Australia

Section de Physique Université de Genève Geneva Switzerland

SLAC National Accelerator Laboratory Stanford CA USA

State Research Center Institute for High Energy Physics Protvino Russia

SUPA School of Physics and Astronomy University of Edinburgh Edinburgh UK

SUPA School of Physics and Astronomy University of Glasgow Glasgow UK

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

TRIUMF Vancouver BC Canada; Department of Physics and Astronomy York University Toronto ON Canada

Universidade Federal do Rio De Janeiro COPPE EE IF Rio de Janeiro Brazil; Federal University of Juiz de Fora Sao Joao del Rei Brazil; Instituto de Fisica Universidade de Sao Paulo São Paulo Brazil

University of Iowa Iowa City IA USA

Waseda University Tokyo Japan

Yerevan Physics Institute Yerevan Armenia

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