1 Ocak 2020 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>2020-01-01</dc:date>
  <dc:description>Electron and photon triggers covering transverse energies from 5   $\text{GeV}\phantom{\rule{0.333333em}{0ex}}$  to several   $\text{TeV}\phantom{\rule{0.333333em}{0ex}}$  are essential for the ATLAS experiment to record signals for a wide variety of physics: from Standard Model processes to searches for new phenomena in both proton–proton and heavy-ion collisions. To cope with a fourfold increase of peak LHC luminosity from 2015 to 2018 (Run 2), to   $2.1×{10}^{34}\phantom{\rule{0.166667em}{0ex}}{\text{cm}}^{-2}\phantom{\rule{0.333333em}{0ex}}{\text{s}}^{-1}$ , and a similar increase in the number of interactions per beam-crossing to about 60, trigger algorithms and selections were optimised to control the rates while retaining a high efficiency for physics analyses. For proton–proton collisions, the single-electron trigger efficiency relative to a single-electron offline selection is at least 75% for an offline electron of 31   $\text{GeV}\phantom{\rule{0.333333em}{0ex}}$ , and rises to 96% at 60   $\text{GeV}\phantom{\rule{0.333333em}{0ex}}$ ; the trigger efficiency of a 25   $\text{GeV}\phantom{\rule{0.333333em}{0ex}}$  leg of the primary diphoton trigger relative to a tight offline photon selection is more than 96% for an offline photon of 30   $\text{GeV}\phantom{\rule{0.333333em}{0ex}}$ . For heavy-ion collisions, the primary electron and photon trigger efficiencies relative to the corresponding standard offline selections are at least 84% and 95%, respectively, at 5   $\text{GeV}\phantom{\rule{0.333333em}{0ex}}$  above the corresponding trigger threshold.</dc:description>
  <dc:identifier>https://aperta.ulakbim.gov.trrecord/105427</dc:identifier>
  <dc:identifier>oai:zenodo.org:105427</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 80(1)</dc:source>
  <dc:title>Performance of electron and photon triggers in ATLAS during LHC Run 2</dc:title>
  <dc:type>info:eu-repo/semantics/article</dc:type>
  <dc:type>publication-article</dc:type>
</oai_dc:dc>