Artigo
Measurement of differential top-quark-pair production cross sections in pp collisions at √s = 7TeV
Fecha
2013-03-19Registro en:
European Physical Journal C, v. 73, n. 3, p. 1-29, 2013.
1434-6044
1434-6052
10.1140/epjc/s10052-013-2339-4
WOS:000318290600012
2-s2.0-84876433344
2-s2.0-84876433344.pdf
Autor
CERN
Yerevan Physics Institute
Institut für Hochenergiephysik der OeAW
National Centre for Particle and High Energy Physics
Universiteit Antwerpen
Vrije Universiteit Brussel
Université Libre de Bruxelles
Ghent University
Université Catholique de Louvain
Université de Mons
Centro Brasileiro de Pesquisas Físicas (CBPF)
Universidade do Estado do Rio de Janeiro (UERJ)
Instituto de Fisica Teorica
Universidade Estadual Paulista (Unesp)
Institute for Nuclear Research and Nuclear Energy
University of Sofia
Institute of High Energy Physics
Peking University
Universidad de los Andes
Technical University of Split
University of Split
Institute Rudjer Boskovic
University of Cyprus
Charles University
Egyptian Network of High Energy Physics
National Institute of Chemical Physics and Biophysics
University of Helsinki
Helsinki Institute of Physics
Lappeenranta University of Technology
CEA/Saclay
IN2P3-CNRS
CNRS/IN2P3
Université de Lyon, Université Claude Bernard Lyon 1, CNRS-IN2P3
Academy of Science
RWTH Aachen University
Deutsches Elektronen-Synchrotron
University of Hamburg
Institut für Experimentelle Kernphysik
Institute of Nuclear Physics Demokritos
University of Athens
University of Ioánnina
KFKI Research Institute for Particle and Nuclear Physics
Institute of Nuclear Research ATOMKI
University of Debrecen
Panjab University
University of Delhi
Saha Institute of Nuclear Physics
Bhabha Atomic Research Centre
Tata Institute of Fundamental Research - EHEP
Tata Institute of Fundamental Research - HECR
Institute for Research in Fundamental Sciences (IPM)
INFN Sezione di Bari
Università di Bari
Politecnico di Bari
INFN Sezione di Bologna
Università di Bologna
INFN Sezione di Catania
Università di Catania
INFN Sezione di Firenze
Università di Firenze
INFN Laboratori Nazionali di Frascati
INFN Sezione di Genova
Università di Genova
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Università di Milano-Bicocca
INFN Sezione di Napoli
Università di Napoli Federico II
INFN Sezione di Padova
Università di Padova
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Università di Pavia
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Università di Perugia
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Università di Pisa
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Università di Roma
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Università di Trieste
Kangwon National University
Kyungpook National University
Chonnam National University
Korea University
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Sungkyunkwan University
Vilnius University
Centro de Investigacion y de Estudios Avanzados del IPN
Universidad Iberoamericana
Benemerita Universidad Autonoma de Puebla
Universidad Autónoma de San Luis Potosí
University of Auckland
University of Canterbury
Quaid-I-Azam University
National Centre for Nuclear Research
University of Warsaw
Laboratório de Instrumentação e Física Experimental de Partículas (LIP)
Joint Institute for Nuclear Research
Petersburg Nuclear Physics Institute
Institute for Nuclear Research
Institute for Theoretical and Experimental Physics (ITEP)
Moscow State University
P.N. Lebedev Physical Institute
Institute for High Energy Physics
University of Belgrade
Centro de Investigaciones Energéticas Medioambientales y Tecnológicas (CIEMAT)
Universidad Autónoma de Madrid
Universidad de Oviedo
CSIC-Universidad de Cantabria
Paul Scherrer Institut
ETH Zurich
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National Taiwan University (NTU)
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Kharkov Institute of Physics and Technology
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Rutherford Appleton Laboratory
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Fairfield University
Fermi National Accelerator Laboratory
University of Florida
Florida International University
Florida State University
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Resumen
Normalised differential top-quark-pair production cross sections are measured in pp collisions at a centre-of-mass energy of 7 TeVat the LHC with the CMS detector using data recorded in 2011 corresponding to an integrated luminosity of 5. 0 fb-1. The measurements are performed in the lepton+jets decay channels (e+jets and μ+jets) and the dilepton decay channels (e+}e-, μ+μ-, and μ±e∓). The tt̄ differential cross section is measured as a function of kinematic properties of the final-state charged leptons and jets associated to b quarks, as well as those of the top quarks and the tt̄ system. The data are compared with several predictions from perturbative QCD calculations up to approximate next-to-next-to-leading-order precision. No significant deviations from the standard model are observed. © 2013 CERN for the benefit of the CMS collaboration.