1 Ocak 2019 Dergi makalesi Açık Erişim

CERN İşbirliği

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{
  "@context": "https://schema.org/", 
  "@id": 106059, 
  "@type": "ScholarlyArticle", 
  "creator": [
    {
      "@type": "Person", 
      "affiliation": "CERN", 
      "name": "CERN \u0130\u015fbirli\u011fi"
    }
  ], 
  "datePublished": "2019-01-01", 
  "description": "<p>A search for four-top-quark production, $t\\overline{t}t\\overline{t}$, is presented. It is based on proton-proton collision data with a center-of-mass energy $\\sqrt{s}=13\\text{}\\text{}\\mathrm{TeV}$ collected by the ATLAS detector at the Large Hadron Collider during the years 2015 and 2016, corresponding to an integrated luminosity of $36.1\\text{}\\text{}{\\mathrm{fb}}^{-1}$. Data are analyzed in both the single-lepton and opposite-sign dilepton channels, characterized by the presence of one or two isolated electrons or muons with high-transverse momentum and multiple jets. A data-driven method is used to estimate the dominant background from top-quark pair production in association with jets. No significant excess above the Standard Model expectation is observed. The result is combined with the previous same-sign dilepton and multilepton searches carried out by the ATLAS Collaboration and an observed (expected) upper limit of 5.3 (2.1) times the four-top-quark Standard Model cross section is obtained at 95% confidence level. Additionally, an upper limit on the anomalous four-top-quark production cross section is set in the context of an effective field theory model.</p>", 
  "headline": "Search for four-top-quark production in the single-lepton and opposite-sign dilepton final states in $pp$ collisions at $\\sqrt{s}=13\\text{}\\text{}\\mathrm{TeV}$ with the ATLAS detector", 
  "identifier": 106059, 
  "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 four-top-quark production in the single-lepton and opposite-sign dilepton final states in $pp$ collisions at $\\sqrt{s}=13\\text{}\\text{}\\mathrm{TeV}$ with the ATLAS detector", 
  "url": "https://aperta.ulakbim.gov.tr/record/106059"
}