Performance of the ATLAS Level-1 topological trigger in Run 2 - INSPIRE

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Performance of the ATLAS Level-1 topological trigger in Run 2

ATLAS

Collaboration

May 4, 2021

26 pages

Published in:

Eur.Phys.J.C 82 (2022) 1, 7

Published: Jan 5, 2022

e-Print:

2105.01416 [hep-ex]

DOI:

10.1140/epjc/s10052-021-09807-0

Report number:

CERN-EP-2021-040

Experiments:

CERN-LHC-ATLAS

View in:

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Abstract: (Springer)

During LHC Run 2 (2015–2018) the ATLAS Level-1 topological trigger allowed efficient data-taking by the ATLAS experiment at luminosities up to 2.1

\times

10

^{34}

cm

^{-2}

s

^{-1}

, which exceeds the design value by a factor of two. The system was installed in 2016 and operated in 2017 and 2018. It uses Field Programmable Gate Array processors to select interesting events by placing kinematic and angular requirements on electromagnetic clusters, jets,

\tau

-leptons, muons and the missing transverse energy. It allowed to significantly improve the background event rejection and signal event acceptance, in particular for Higgs and B-physics processes.

Note:

36 pages in total, author list starting page 20, 10 figures, 3 tables, submitted to EPJC. All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/TRIG-2019-02/

p p: scattering
p p: colliding beams
cluster: electromagnetic
ATLAS: performance
topological
trigger: performance
muon: trigger
jet: trigger
tau: trigger
FPGA

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