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Measurement of differential $\mathrm{t\bar{t}}$ production cross sections using top quarks at large transverse momenta in $pp$ collisions at $\sqrt{s} =$ 13 TeV

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  • Additional Information
    • Contributors:
      Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU); Université Paris-Saclay-Direction de Recherche Fondamentale (CEA) (DRF (CEA)); Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA); Laboratoire Leprince-Ringuet (LLR); Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS); Institut Pluridisciplinaire Hubert Curien (IPHC); Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS); Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA)); Institut de Physique Nucléaire de Lyon (IPNL); Université Claude Bernard Lyon 1 (UCBL); Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS); Laboratoire d'Annecy de Physique des Particules (LAPP); Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS); CMS
    • Publication Information:
      HAL CCSD
    • Publication Date:
      2021
    • Collection:
      HAL-IN2P3 (Institut national de physique nucléaire et de physique des particules)
    • Abstract:
      International audience ; A measurement is reported of differential top quark pair (tt¯) production cross sections, where top quarks are produced at large transverse momenta. The data collected with the CMS detector at the LHC are from pp collisions at a center-of-mass energy of 13 TeV corresponding to an integrated luminosity of 35.9 fb-1. The measurement uses events where at least one top quark decays as t→Wb→qq¯′b and is reconstructed as a large-radius jet with transverse momentum in excess of 400 GeV. The second top quark is required to decay either in a similar way or leptonically, as inferred from a reconstructed electron or muon, a bottom quark jet, and missing transverse momentum due to the undetected neutrino. The cross section is extracted as a function of kinematic variables of individual top quarks or of the tt¯ system. The results are presented at the particle level, within a region of phase space close to that of the experimental acceptance, and at the parton level and are compared to various theoretical models. In both decay channels, the observed absolute cross sections are significantly lower than the predictions from theory, while the normalized differential measurements are well described.
    • Relation:
      info:eu-repo/semantics/altIdentifier/arxiv/2008.07860; hal-02934069; https://hal.science/hal-02934069; https://hal.science/hal-02934069/document; https://hal.science/hal-02934069/file/hal-02934069.pdf; ARXIV: 2008.07860; INSPIRE: 1812091
    • Accession Number:
      10.1103/PhysRevD.103.052008
    • Online Access:
      https://doi.org/10.1103/PhysRevD.103.052008
      https://hal.science/hal-02934069
      https://hal.science/hal-02934069/document
      https://hal.science/hal-02934069/file/hal-02934069.pdf
    • Rights:
      info:eu-repo/semantics/OpenAccess
    • Accession Number:
      edsbas.F1DA12A1