Measurements of top-quark pair differential cross-sections in the lepton+jets channel in pp collisions at [Formula: see text] using the ATLAS detector

. 2016 ; 76 (10) : 538. [epub] 20161003

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

Typ dokumentu časopisecké články

Perzistentní odkaz   https://www.medvik.cz/link/pmid28747847

Measurements of normalized differential cross-sections of top-quark pair production are presented as a function of the top-quark, [Formula: see text] system and event-level kinematic observables in proton-proton collisions at a centre-of-mass energy of [Formula: see text]. The observables have been chosen to emphasize the [Formula: see text] production process and to be sensitive to effects of initial- and final-state radiation, to the different parton distribution functions, and to non-resonant processes and higher-order corrections. The dataset corresponds to an integrated luminosity of 20.3 fb[Formula: see text], recorded in 2012 with the ATLAS detector at the CERN Large Hadron Collider. Events are selected in the lepton+jets channel, requiring exactly one charged lepton and at least four jets with at least two of the jets tagged as originating from a b-quark. The measured spectra are corrected for detector effects and are compared to several Monte Carlo simulations. The results are in fair agreement with the predictions over a wide kinematic range. Nevertheless, most generators predict a harder top-quark transverse momentum distribution at high values than what is observed in the data. Predictions beyond NLO accuracy improve the agreement with data at high top-quark transverse momenta. Using the current settings and parton distribution functions, the rapidity distributions are not well modelled by any generator under consideration. However, the level of agreement is improved when more recent sets of parton distribution functions are used.

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

Centre National de l'Energie des Sciences Techniques Nucleaires Rabat Morocco

Centro de Física Nuclear da Universidade de Lisboa Lisbon Portugal

Centro de Investigaciones Universidad Antonio Narino Bogota Colombia

CERN Geneva Switzerland

CPP MAix 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 Fisica Teorica C 15 Universidad Autonoma de Madrid Madrid Spain

Departamento de Fisica Teorica y del Cosmos and CAFPE Universidad de Granada Granada Spain

Departamento de Física Universidad de Buenos Aires Buenos Aires Argentina

Departamento de Física Universidad Técnica Federico Santa María Valparaiso Chile

Departamento de Fisica Universidade do Minho Braga Portugal

Department for Physics and Technology University of Bergen Bergen Norway

Department of Modern Physics University of Science and Technology of China Hefei Anhui China

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 Shanghai Key Laboratory for Particle Physics and Cosmology Shanghai Jiao Tong University Shanghai China

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

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Department of Physics and Astronomy University of Pittsburgh Pittsburgh PA USA

Department of Physics and Astronomy University of Sheffield Sheffield UK

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Department of Physics Aristotle University of Thessaloniki Thessaloníki Greece

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Department of Subnuclear Physics Institute of Experimental Physics of the Slovak Academy of Sciences Kosice Slovak Republic

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DESY Hamburg and Zeuthen Germany

Dipartimento di Chimica Fisica e Ambiente Università di Udine Udine Italy

Dipartimento di Fisica e Astronomia Università di Bologna Bologna Italy

Dipartimento di Fisica E Fermi Università di Pisa Pisa Italy

Dipartimento di Fisica Sapienza Università di Roma Rome Italy

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Dipartimento di Fisica Università di Napoli Naples Italy

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Dipartimento di Fisica Università di Roma Tor Vergata Rome Italy

Dipartimento di Matematica e Fisica Università del Salento Lecce Italy

Dipartimento di Matematica e Fisica Università Roma Tre Rome Italy

Division of Physics TOBB University of Economics and Technology Ankara Turkey

DSM IRFU Gif sur Yvette France

E Andronikashvili Institute of Physics Iv Javakhishvili Tbilisi State University Tbilisi Georgia

Electrical Circuits Department Federal University of Juiz de Fora Juiz de Fora Brazil

Enrico Fermi Institute University of Chicago Chicago IL USA

Fachbereich C Physik Bergische Universität Wuppertal Wuppertal Germany

Fachbereich Physik Universität Siegen Siegen Germany

Faculdade de Ciências Universidade de Lisboa Lisbon Portugal

Faculté des Sciences Ain Chock Réseau Universitaire de Physique des Hautes Energies Université Hassan 2 Casablanca Morocco

Faculté des Sciences Semlalia Université Cadi Ayyad LPHEA Marrakech Marrakesh Morocco

Faculté des Sciences Université Mohamed Premier and LPTPM Oujda Morocco

Faculté des Sciences Université Mohammed 5 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 Slovakia

Faculty of Physics and Applied Computer Science AGH University of Science and Technology Kraków Poland

Faculty of Pure and Applied Sciences and Center for Integrated Research in Fundamental Science and Engineering University of Tsukuba Tsukuba Japan

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Fakultät für Physik und Astronomie Julius Maximilians Universität Würzburg Germany

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

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Group of Particle Physics University of Montreal Montreal QC Canada

High Energy Physics Division Argonne National Laboratory Argonne IL USA

High Energy Physics Institute Tbilisi State University Tbilisi Georgia

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

ICTP Trieste Italy

INFN Gruppo Collegato di Cosenza Laboratori Nazionali di Frascati Rende Italy

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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 MathematicsAstrophysics 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

Institute of Nuclear Physics Polish Academy of Sciences Kraków Poland

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

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

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

Istanbul Aydin University Istanbul Turkey

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

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

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Laboratory for Particle Physics and Cosmology Harvard University Cambridge MA USA

LAL Univ Paris Sud CNRS IN2P3 Université Paris Saclay Orsay France

LAPP CNRS IN2P3 and Université Savoie Mont Blanc Annecy le Vieux France

Louisiana Tech University Ruston LA USA

Marian Smoluchowski Institute of Physics Jagiellonian University Kraków Poland

Max Planck Institut für Physik Munich Germany

Nagasaki Institute of Applied Science Nagasaki Japan

National Institute of Physics and Nuclear Engineering Bucharest Romania

National Research Centre Kurchatov Institute B P Konstantinov Petersburg Nuclear Physics Institute St Petersburg Russia

National Research Nuclear University MEPhI Moscow Russia

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

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

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