1 Ocak 2019 Dergi makalesi Açık Erişim

CERN İşbirliği

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{
  "@context": "https://schema.org/", 
  "@id": 105967, 
  "@type": "ScholarlyArticle", 
  "creator": [
    {
      "@type": "Person", 
      "affiliation": "CERN", 
      "name": "CERN \u0130\u015fbirli\u011fi"
    }
  ], 
  "datePublished": "2019-01-01", 
  "description": "<p>A measurement of the associated production of a top-quark pair ($t\\overline{t}$) with a vector boson ($W$, $Z$) in proton-proton collisions at a center-of-mass energy of 13 TeV is presented, using $36.1\\text{}\\text{}{\\mathrm{fb}}^{-1}$ of integrated luminosity collected by the ATLAS detector at the Large Hadron Collider. Events are selected in channels with two same- or opposite-sign leptons (electrons or muons), three leptons or four leptons, and each channel is further divided into multiple regions to maximize the sensitivity of the measurement. The $t\\overline{t}Z$ and $t\\overline{t}W$ production cross sections are simultaneously measured using a combined fit to all regions. The best-fit values of the production cross sections are ${\\sigma }_{t\\overline{t}Z}=0.95\u00b10.0{8}_{\\mathrm{stat}}\u00b10.1{0}_{\\mathrm{syst}}\\text{}\\text{}\\mathrm{pb}$ and ${\\sigma }_{t\\overline{t}W}=0.87\u00b10.1{3}_{\\mathrm{stat}}\u00b10.1{4}_{\\mathrm{syst}}\\text{}\\text{}\\mathrm{pb}$ in agreement with the Standard Model predictions. The measurement of the $t\\overline{t}Z$ cross section is used to set constraints on effective field theory operators which modify the $t\\overline{t}Z$ vertex.</p>", 
  "headline": "Measurement of the $t\\overline{t}Z$ and $t\\overline{t}W$ cross sections in proton-proton collisions at $\\sqrt{s}=13\\text{}\\text{}\\mathrm{TeV}$ with the ATLAS detector", 
  "identifier": 105967, 
  "image": "https://aperta.ulakbim.gov.tr/static/img/logo/aperta_logo_with_icon.svg", 
  "license": "http://www.opendefinition.org/licenses/cc-by", 
  "name": "Measurement of the $t\\overline{t}Z$ and $t\\overline{t}W$ cross sections in proton-proton collisions at $\\sqrt{s}=13\\text{}\\text{}\\mathrm{TeV}$ with the ATLAS detector", 
  "url": "https://aperta.ulakbim.gov.tr/record/105967"
}