Aug 5 – 10, 2019
Westin Harbour Castle, Toronto Canada
America/Toronto timezone

The ATLAS Electron and Photon Trigger Performance in Run 2

Aug 8, 2019, 10:30 AM
Harbour Ballroom (Westin Harbour Castle, Toronto Canada)

Harbour Ballroom

Westin Harbour Castle, Toronto Canada

1 Harbour Square, Toronto, Ontario, Canada
Poster submission Accelerators, Detectors and Computing for HEP Poster Session (Thu/Fri)


Mr Lucas Macrorie Flores (University of Pennsylvania (US))


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. Main triggers used during 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 performance during Run-2 data-taking is presented as well as work ongoing to prepare to even higher luminosity of Run 3 (2021-2023).

Presentation materials