1 Ocak 2015 Dergi makalesi Açık Erişim

CERN İşbirliği

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{
  "@context": "https://schema.org/", 
  "@id": 108205, 
  "@type": "ScholarlyArticle", 
  "creator": [
    {
      "@type": "Person", 
      "affiliation": "CERN", 
      "name": "CERN \u0130\u015fbirli\u011fi"
    }
  ], 
  "datePublished": "2015-01-01", 
  "description": "<p>Measurements of the ZZ and WW final states in the mass range above the 2mZ and 2mW thresholds provide a unique opportunity to measure the off-shell coupling strength of the Higgs boson. This paper presents constraints on the off-shell Higgs boson event yields normalised to the Standard Model prediction (signal strength) in the ZZ\u21924\u2113 , ZZ\u21922\u21132\u03bd and WW\u2192e\u03bd\u03bc\u03bd final states. The result is based on pp collision data collected by the ATLAS experiment at the LHC, corresponding to an integrated luminosity of 20.3 fb -1 at a collision energy of s=8 \u00a0TeV. Using the CLs method, the observed 95\u00a0% confidence level (CL) upper limit on the off-shell signal strength is in the range 5.1\u20138.6, with an expected range of 6.7\u201311.0. In each case the range is determined by varying the unknown gg\u2192ZZ and gg\u2192WW background K-factor from higher-order quantum chromodynamics corrections between half and twice the value of the known signal K-factor. Assuming the relevant Higgs boson couplings are independent of the energy scale of the Higgs boson production, a combination with the on-shell measurements yields an observed (expected) 95\u00a0% CL upper limit on \u0393H/\u0393HSM in the range 4.5\u20137.5 (6.5\u201311.2) using the same variations of the background K-factor. Assuming that the unknown gg\u2192VV background K-factor is equal to the signal K-factor, this translates into an observed (expected) 95\u00a0% CL upper limit on the Higgs boson total width of 22.7 (33.0)\u00a0MeV.</p>", 
  "headline": "Constraints on the off-shell Higgs boson signal strength in the high-mass ZZ and WW final states with the ATLAS detector", 
  "identifier": 108205, 
  "image": "https://aperta.ulakbim.gov.tr/static/img/logo/aperta_logo_with_icon.svg", 
  "license": "http://www.opendefinition.org/licenses/cc-by", 
  "name": "Constraints on the off-shell Higgs boson signal strength in the high-mass ZZ and WW final states with the ATLAS detector", 
  "url": "https://aperta.ulakbim.gov.tr/record/108205"
}