1 Ocak 2023 Dergi makalesi Açık Erişim

CERN İşbirliği

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{
  "@context": "https://schema.org/", 
  "@id": 264484, 
  "@type": "ScholarlyArticle", 
  "creator": [
    {
      "@type": "Person", 
      "affiliation": "CERN", 
      "name": "CERN \u0130\u015fbirli\u011fi"
    }
  ], 
  "datePublished": "2023-01-01", 
  "description": "<p>A search for pair-produced vector-like quarks using events with exactly one lepton (e or     $\\mu $  ), at least four jets including at least one b-tagged jet, and large missing transverse momentum is presented. Data from proton\u2013proton collisions at a centre-of-mass energy of     $\\sqrt{s}=$  13     $\\text{TeV}$  , recorded by the ATLAS detector at the LHC from 2015 to 2018 and corresponding to an integrated luminosity of 139 fb    ${}^{-1}$  , are analysed. Vector-like partners T and B of the top and bottom quarks are considered, as is a vector-like X with charge     $+5/3$  , assuming their decay into a W, Z, or Higgs boson and a third-generation quark. No significant deviations from the Standard Model expectation are observed. Upper limits on the production cross-section of T and B quark pairs as a function of their mass are derived for various decay branching ratio scenarios. The strongest lower limits on the masses are 1.59     $\\text{TeV}$   assuming mass-degenerate vector-like quarks and branching ratios corresponding to the weak-isospin doublet model, and 1.47     $\\text{TeV}$   (1.46     $\\text{TeV}$  ) for exclusive     $T\\to Zt$   (    $B/X\\to Wt$  ) decays. In addition, lower limits on the T and B quark masses are derived for all possible branching ratios.</p>", 
  "headline": "Search for pair-produced vector-like top and bottom partners in events with large missing transverse momentum in pp collisions with the ATLAS detector", 
  "identifier": 264484, 
  "image": "https://aperta.ulakbim.gov.tr/static/img/logo/aperta_logo_with_icon.svg", 
  "license": "http://www.opendefinition.org/licenses/cc-by", 
  "name": "Search for pair-produced vector-like top and bottom partners in events with large missing transverse momentum in pp collisions with the ATLAS detector", 
  "url": "https://aperta.ulakbim.gov.tr/record/264484"
}