Please use this identifier to cite or link to this item:
https://hdl.handle.net/10316/106035
Title: | Performance of electron and photon triggers in ATLAS during LHC Run 2 | Authors: | Veloso, F. Wolters, H. ATLAS Collaboration |
Issue Date: | 2020 | Publisher: | Springer Nature | Serial title, monograph or event: | European Physical Journal C | Volume: | 80 | Issue: | 1 | Abstract: | Electron and photon triggers covering transverse energies from 5 GeV to several TeV are essential for the ATLAS experiment to record signals for a wide variety of physics: from StandardModel 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 × 1034 cm−2 s−1, and a similar increase in the number of interactions per beamcrossing 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 GeV, and rises to 96% at 60 GeV; the trigger efficiency of a 25GeVleg of the primary diphoton trigger relative to a tight offline photon selection is more than 96% for an offline photon of 30 GeV. 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 GeV above the corresponding trigger threshold. | URI: | https://hdl.handle.net/10316/106035 | DOI: | 10.1140/epjc/s10052-019-7500-2 | Rights: | openAccess |
Appears in Collections: | FCTUC Física - Artigos em Revistas Internacionais |
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Performance-of-electron-and-photon-triggers-in-ATLAS-during-LHC-Run-2European-Physical-Journal-C.pdf | 2.91 MB | Adobe PDF | View/Open |
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