The ATLAS Inner Detector Trigger performance in pp collisions at 13 TeV during LHC Run 2

ATLAS Collaboration

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The design and performance of the inner detector trigger for the high level trigger of the ATLAS experiment at the Large Hadron Collider during the 2016-18 data taking period is discussed. In 2016, 2017, and 2018 the ATLAS detector recorded 35.6 fb-1, 46.9 fb-1, and 60.6 fb-1 respectively of proton-proton collision data at a centre-of-mass energy of 13 TeV. In order to deal with the very high interaction multiplicities per bunch crossing expected with the 13 TeV collisions the inner detector trigger was redesigned during the long shutdown of the Large Hadron Collider from 2013 until 2015. An overview of these developments is provided and the performance of the tracking in the trigger for the muon, electron, tau and $b$-jet signatures is discussed. The high performance of the inner detector trigger with these extreme interaction multiplicities demonstrates how the inner detector tracking continues to lie at the heart of the trigger performance and is essential in enabling the ATLAS physics programme.
Original languageEnglish
Article number206
Number of pages57
JournalEuropean Physical Journal C
Issue number3
Publication statusPublished - 8 Mar 2022

Bibliographical note

Not yet published as of 01/03/02/2022.

79 pages in total, author list starting page 64, 43 figures, 0 tables, submitted to Eur. Phys. J. C. All figures including auxiliary figures are available at


  • hep-ex


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