1 Ocak 2015 Dergi makalesi Açık Erişim

CERN İşbirliği

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  <dc:creator>CERN İşbirliği</dc:creator>
  <dc:date>2015-01-01</dc:date>
  <dc:description>A search for a standard model Higgs boson produced in association with a top-quark pair and decaying to bottom quarks is presented. Events with hadronic jets and one or two oppositely charged leptons are selected from a data sample corresponding to an integrated luminosity of 19.5 fb-1 collected by the CMS experiment at the LHC in pp collisions at a centre-of-mass energy of 8 TeV . In order to separate the signal from the larger tt¯  + jets background, this analysis uses a matrix element method that assigns a probability density value to each reconstructed event under signal or background hypotheses. The ratio between the two values is used in a maximum likelihood fit to extract the signal yield. The results are presented in terms of the measured signal strength modifier, μ , relative to the standard model prediction for a Higgs boson mass of 125 GeV . The observed (expected) exclusion limit at a 95 % confidence level is μ&lt;4.2 (3.3), corresponding to a best fit value μ^=1.2-1.5+1.6 .</dc:description>
  <dc:identifier>https://aperta.ulakbim.gov.trrecord/108259</dc:identifier>
  <dc:identifier>oai:zenodo.org:108259</dc:identifier>
  <dc:rights>info:eu-repo/semantics/openAccess</dc:rights>
  <dc:rights>http://www.opendefinition.org/licenses/cc-by</dc:rights>
  <dc:source>European Physical Journal C 6</dc:source>
  <dc:title>Search for a standard model Higgs boson produced in association with a top-quark pair and decaying to bottom quarks using a matrix element method</dc:title>
  <dc:type>info:eu-repo/semantics/article</dc:type>
  <dc:type>publication-article</dc:type>
</oai_dc:dc>