1 Ocak 2020 Dergi makalesi Açık Erişim

CERN İşbirliği

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{
  "@context": "https://schema.org/", 
  "@id": 105427, 
  "@type": "ScholarlyArticle", 
  "creator": [
    {
      "@type": "Person", 
      "affiliation": "CERN", 
      "name": "CERN \u0130\u015fbirli\u011fi"
    }
  ], 
  "datePublished": "2020-01-01", 
  "description": "<p>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\u2013proton and heavy-ion collisions. To cope with a fourfold increase of peak LHC luminosity from 2015 to 2018 (Run 2), to   $2.1\u00d7{10}^{34}\\phantom{\\rule{0.166667em}{0ex}}{\\text{cm}}^{-2}\\phantom{\\rule{0.333333em}{0ex}}{\\text{s}}^{-1}$ , 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\u2013proton 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.</p>", 
  "headline": "Performance of electron and photon triggers in ATLAS during LHC Run 2", 
  "identifier": 105427, 
  "image": "https://aperta.ulakbim.gov.tr/static/img/logo/aperta_logo_with_icon.svg", 
  "license": "http://www.opendefinition.org/licenses/cc-by", 
  "name": "Performance of electron and photon triggers in ATLAS during LHC Run 2", 
  "url": "https://aperta.ulakbim.gov.tr/record/105427"
}