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Search for new physics in top quark production with additional leptons in proton-proton collisions at $\sqrt{s} = $ 13 TeV using effective field theory

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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); Institut Polytechnique de Paris (IP Paris)-Institut Polytechnique de Paris (IP Paris)-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 des 2 Infinis de Lyon (IP2I Lyon); 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:
      CCSD
      Springer
    • Publication Date:
      2021
    • Collection:
      HAL-IN2P3 (Institut national de physique nucléaire et de physique des particules)
    • Abstract:
      International audience ; Events containing one or more top quarks produced with additional prompt leptons are used to search for new physics within the framework of an effective field theory (EFT). The data correspond to an integrated luminosity of 41.5 fb$^{−1}$ of proton-proton collisions at a center-of-mass energy of 13 TeV at the LHC, collected by the CMS experiment in 2017. The selected events are required to have either two leptons with the same charge or more than two leptons; jets, including identified bottom quark jets, are also required, and the selected events are divided into categories based on the multiplicities of these objects. Sixteen dimension-six operators that can affect processes involving top quarks produced with additional charged leptons are considered in this analysis. Constructed to target EFT effects directly, the analysis applies a novel approach in which the observed yields are parameterized in terms of the Wilson coefficients (WCs) of the EFT operators. A simultaneous fit of the 16 WCs to the data is performed and two standard deviation confidence intervals for the WCs are extracted; the standard model expectations for the WC values are within these intervals for all of the WCs probed.[graphic not available: see fulltext]
    • Relation:
      info:eu-repo/semantics/altIdentifier/arxiv/2012.04120; ARXIV: 2012.04120; INSPIRE: 1835318
    • Accession Number:
      10.1007/JHEP03(2021)095
    • Online Access:
      https://hal.science/hal-03098879
      https://hal.science/hal-03098879v1/document
      https://hal.science/hal-03098879v1/file/Sirunyan2021_Article_SearchForNewPhysicsInTopQuarkP.pdf
      https://doi.org/10.1007/JHEP03(2021)095
    • Rights:
      info:eu-repo/semantics/OpenAccess
    • Accession Number:
      edsbas.A290AE58