1 Ocak 2017 Dergi makalesi Açık Erişim

CERN İşbirliği

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  <identifier identifierType="URL">https://aperta.ulakbim.gov.tr/record/107153</identifier>
  <creators>
    <creator>
      <creatorName>CERN İşbirliği</creatorName>
      <affiliation>CERN</affiliation>
    </creator>
  </creators>
  <titles>
    <title>Performance Of The Atlas Track Reconstruction Algorithms In Dense Environments In Lhc Run 2</title>
  </titles>
  <publisher>Aperta</publisher>
  <publicationYear>2017</publicationYear>
  <dates>
    <date dateType="Issued">2017-01-01</date>
  </dates>
  <resourceType resourceTypeGeneral="Text">Journal article</resourceType>
  <alternateIdentifiers>
    <alternateIdentifier alternateIdentifierType="url">https://aperta.ulakbim.gov.tr/record/107153</alternateIdentifier>
  </alternateIdentifiers>
  <relatedIdentifiers>
    <relatedIdentifier relatedIdentifierType="DOI" relationType="IsIdenticalTo">10.1140/epjc/s10052-017-5225-7</relatedIdentifier>
  </relatedIdentifiers>
  <rightsList>
    <rights rightsURI="http://www.opendefinition.org/licenses/cc-by">Creative Commons Attribution</rights>
    <rights rightsURI="info:eu-repo/semantics/openAccess">Open Access</rights>
  </rightsList>
  <descriptions>
    <description descriptionType="Abstract">&lt;p&gt;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.&lt;/p&gt;</description>
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