Title :
Evolution and performance of electron and photon triggers in ATLAS in the year 2011
Author :
Solovyev, Vladimir
Author_Institution :
Petersburg Nucl. Phys. Inst., St. Petersburg, Russia
Abstract :
Electron and photon triggers are used for signal selection in a wide variety of ATLAS physics analyses. Further dedicated triggers are provided for the collection of J/ψ →e+e-, W→ ev and QCD background samples for calibration, efficiency and fake rate measurements. In the 2011 proton-proton data-taking period, the increasing luminosity and pile-up conditions at the LHC demanded the use of progressively higher energy thresholds and tighter selections to control the trigger rates. This proceedings summarize the evolution and performance of ATLAS electron and photon triggers used in 2011 data-taking.
Keywords :
W bosons; electron detection; high-energy elementary particle interactions; intermediate boson decay; meson leptonic decay; nuclear electronics; position sensitive particle detectors; proton-proton inclusive interactions; psi mesons; quantum chromodynamics; trigger circuits; ATLAS; J/psi decay into electron+positron; LHC; QCD background samples; W decay into electron+neutrino; electron trigger performance; fake rate measurements; high energy thresholds; luminosity conditions; photon trigger performance; pile-up conditions; proton+proton data; trigger rates; Collaboration; Detectors; Estimation; Large Hadron Collider; Photonics; Physics; Probes;
Conference_Titel :
Real Time Conference (RT), 2012 18th IEEE-NPSS
Conference_Location :
Berkeley, CA
Print_ISBN :
978-1-4673-1082-6
DOI :
10.1109/RTC.2012.6418203
