2 Aralık 2024 Dergi makalesi Açık Erişim

CERN İşbirliği

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{
  "@context": "https://schema.org/", 
  "@id": 274553, 
  "@type": "ScholarlyArticle", 
  "creator": [
    {
      "@type": "Person", 
      "affiliation": "CERN", 
      "name": "CERN \u0130\u015fbirli\u011fi"
    }
  ], 
  "datePublished": "2024-12-02", 
  "description": "<p></p><p>A search for heavy right-handed Majorana neutrinos is performed with the ATLAS detector at the CERN Large Hadron Collider, using the $140\\text{}\\text{}{\\mathrm{fb}}^{-1}$ of proton\u2013proton collision data at $\\sqrt{s}=13\\text{}\\text{}\\mathrm{TeV}$ collected during Run 2. This search targets $t\\overline{t}$ production, in which both top quarks decay into a bottom quark and a $W$ boson, where one of the $W$ bosons decays hadronically and the other decays into an electron or muon and a heavy neutral lepton. The heavy neutral lepton is identified through a decay into an electron or muon and another $W$ boson, resulting in a pair of same-charge same-flavor leptons in the final state. This paper presents the first search for heavy neutral leptons in the mass range of 15\u201375 GeV using $t\\overline{t}$ events. No significant excess is observed over the background expectation, and upper limits are placed on the signal cross sections. Assuming a benchmark scenario of the phenomenological type-I seesaw model, these cross section limits are then translated into upper limits on the mixing parameters of the heavy Majorana neutrino with Standard Model neutrinos.</p><p></p>", 
  "headline": "Search for heavy right-handed Majorana neutrinos in the decay of top quarks produced in proton-proton collisions at $\\sqrt{s}=13\\text{}\\text{}\\mathrm{TeV}$ with the ATLAS detector", 
  "identifier": 274553, 
  "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 heavy right-handed Majorana neutrinos in the decay of top quarks produced in proton-proton collisions at $\\sqrt{s}=13\\text{}\\text{}\\mathrm{TeV}$ with the ATLAS detector", 
  "url": "https://aperta.ulakbim.gov.tr/record/274553"
}