TY - JOUR

T1 - The ATLAS electron and photon trigger performance in LHC run 2

AU - Maximov, D.

PY - 2019/1/1

Y1 - 2019/1/1

N2 - ATLAS electron and photon triggers covering transverse energies from 5 GeV to several TeV are essential 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. The main triggers used during LHC Run 2 (2015–2018) for those physics studies were a single-electron trigger with ET threshold around 25 GeV and a diphoton trigger with thresholds at 25 and 35 GeV. Relying on those simple, general-purpose triggers is seen as a more robust trigger strategy, at a cost of slightly higher trigger output rates, than to use a large number of analysis-specific triggers. To cope with ever-increasing luminosity and more challenging pile-up conditions at the LHC, the trigger selections needed to be optimized to control the rates and keep efficiencies high. The ATLAS electron and photon trigger performance during Run 2 data-taking is presented as well as work ongoing to prepare for the even higher luminosity of Run 3 (2021–2023).

AB - ATLAS electron and photon triggers covering transverse energies from 5 GeV to several TeV are essential 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. The main triggers used during LHC Run 2 (2015–2018) for those physics studies were a single-electron trigger with ET threshold around 25 GeV and a diphoton trigger with thresholds at 25 and 35 GeV. Relying on those simple, general-purpose triggers is seen as a more robust trigger strategy, at a cost of slightly higher trigger output rates, than to use a large number of analysis-specific triggers. To cope with ever-increasing luminosity and more challenging pile-up conditions at the LHC, the trigger selections needed to be optimized to control the rates and keep efficiencies high. The ATLAS electron and photon trigger performance during Run 2 data-taking is presented as well as work ongoing to prepare for the even higher luminosity of Run 3 (2021–2023).

KW - ATLAS

KW - EGamma

KW - HLT

UR - http://www.scopus.com/inward/record.url?scp=85077621135&partnerID=8YFLogxK

M3 - Conference article

AN - SCOPUS:85077621135

VL - 2507

SP - 459

EP - 463

JO - CEUR Workshop Proceedings

JF - CEUR Workshop Proceedings

SN - 1613-0073

T2 - 27th Symposium on Nuclear Electronics and Computing, NEC 2019

Y2 - 30 September 2019 through 4 October 2019

ER -