1 Ocak 2017 Dergi makalesi Açık Erişim

CERN İşbirliği

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<oai_dc:dc xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:oai_dc="http://www.openarchives.org/OAI/2.0/oai_dc/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/oai_dc/ http://www.openarchives.org/OAI/2.0/oai_dc.xsd">
  <dc:creator>CERN İşbirliği</dc:creator>
  <dc:date>2017-01-01</dc:date>
  <dc:description>With the increase in energy of the Large Hadron Collider to a centre-of-mass energy of 13   $\text{TeV}$  for Run 2, events with dense environments, such as in the cores of high-energy jets, became a focus for new physics searches as well as measurements of the Standard Model. These environments are characterized by charged-particle separations of the order of the tracking detectors sensor granularity. Basic track quantities are compared between 3.2 fb  ${}^{-1}$  of data collected by the ATLAS experiment and simulation of proton–proton collisions producing high-transverse-momentum jets at a centre-of-mass energy of 13   $\text{TeV}$ . The impact of charged-particle separations and multiplicities on the track reconstruction performance is discussed. The track reconstruction efficiency in the cores of jets with transverse momenta between 200 and 1600   $\text{GeV}$  is quantified using a novel, data-driven, method. The method uses the energy loss,   $\phantom{\rule{0.333333em}{0ex}}\text{d}E/dx$ , to identify pixel clusters originating from two charged particles. Of the charged particles creating these clusters, the measured fraction that fail to be reconstructed is   $0.061±0.006\phantom{\rule{4pt}{0ex}}\text{(stat.)}±0.014\phantom{\rule{4pt}{0ex}}\text{(syst.)}$  and   $0.093±0.017\phantom{\rule{4pt}{0ex}}\text{(stat.)}±0.021\phantom{\rule{4pt}{0ex}}\text{(syst.)}$  for jet transverse momenta of 200–400   $\text{GeV}$  and 1400–1600   $\text{GeV}$ , respectively.</dc:description>
  <dc:identifier>https://aperta.ulakbim.gov.trrecord/107153</dc:identifier>
  <dc:identifier>oai:zenodo.org:107153</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 77(10)</dc:source>
  <dc:title>Performance of the ATLAS track reconstruction algorithms in dense environments in LHC Run 2</dc:title>
  <dc:type>info:eu-repo/semantics/article</dc:type>
  <dc:type>publication-article</dc:type>
</oai_dc:dc>