2 Aralık 2024 Dergi makalesi Açık Erişim

CERN İşbirliği

Citation Style Language JSON

{
  "DOI": "10.1103/PhysRevD.110.112004", 
  "abstract": "<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>", 
  "author": [
    {
      "family": "CERN \u0130\u015fbirli\u011fi"
    }
  ], 
  "container_title": "Physical Review D", 
  "id": "274553", 
  "issue": "11", 
  "issued": {
    "date-parts": [
      [
        2024, 
        12, 
        2
      ]
    ]
  }, 
  "title": "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", 
  "type": "article-journal", 
  "volume": "110"
}