1 Ocak 2016 Dergi makalesi Açık Erişim

CERN İşbirliği

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  <dc:creator>CERN İşbirliği</dc:creator>
  <dc:date>2016-01-01</dc:date>
  <dc:description>A search for single top-quark production via flavour-changing neutral current processes from gluon plus up- or charm-quark initial states in proton–proton collisions at the LHC is presented. Data collected with the ATLAS detector in 2012 at a centre-of-mass energy of 8 TeV and corresponding to an integrated luminosity of 20.3 fb -1 are used. Candidate events for a top quark decaying into a lepton, a neutrino and a jet are selected and classified into signal- and background-like candidates using a neural network. No signal is observed and an upper limit on the production cross-section multiplied by the t→Wb branching fraction is set. The observed 95 % CL limit is σqg→t×B(t→Wb)&lt;3.4pb and the expected 95 % CL limit is σqg→t×B(t→Wb)&lt;2.9pb . The observed limit can be interpreted as upper limits on the coupling constants of the flavour-changing neutral current interactions divided by the scale of new physics κugt/Λ&lt;5.8×10-3TeV-1 and κcgt/Λ&lt;13×10-3TeV and on the branching fractions B(t→ug)&lt;4.0×10-5 and B(t→cg)&lt;20×10-5 .</dc:description>
  <dc:identifier>https://aperta.ulakbim.gov.trrecord/107953</dc:identifier>
  <dc:identifier>oai:zenodo.org:107953</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 2</dc:source>
  <dc:title>Search for single top-quark production via flavour-changing neutral currents at 8Â TeV with the ATLAS detector</dc:title>
  <dc:type>info:eu-repo/semantics/article</dc:type>
  <dc:type>publication-article</dc:type>
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