The ATLAS inner detector trigger performance in pp collisions at 13 TeV during LHC Run 2

Authors
Aad, G 
Abbott, B 
Abbott, DC 
Abud, A Abed 
Abeling, K 

Change log
Abstract

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.

Publication Date
2022-03
Online Publication Date
2022-03-08
Acceptance Date
2021-12-07
Keywords
Regular Article - Experimental Physics
Journal Title
EUROPEAN PHYSICAL JOURNAL C
Journal ISSN
1434-6044
1434-6052
Volume Title
82
Publisher
Springer Science and Business Media LLC