Performance of the High-Level Trigger System at CMS in LHC Run-2

Choudhury, S (2021) Performance of the High-Level Trigger System at CMS in LHC Run-2. In: IEEE Transactions on Nuclear Science, 68 (8). pp. 2035-2042.

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Abstract

The CMS experiment at the LHC selects events with a two-level trigger system, the Level-1 (L1) trigger, and the high-level trigger (HLT). The HLT reduces the rate from 100 to about 1 kHz and has access to the full detector readout and runs a streamlined version of the offline event reconstruction. During LHC Run-2, the peak instantaneous luminosity reached values up to 2.0× 10³⁴ cm-2s-1, posing a challenge to the online event selection. An overview of the HLT system at CMS, the online physics object reconstruction, and the main triggers using those physics objects in 2016-2018 proton collision data-taking period is presented. The performance of a representative set of physics triggers is also discussed. © 1963-2012 IEEE.

Item Type:	Journal Article
Publication:	IEEE Transactions on Nuclear Science
Publisher:	Institute of Electrical and Electronics Engineers Inc.
Additional Information:	The copyright for this article belongs to Institute of Electrical and Electronics Engineers Inc.
Keywords:	Electrical engineering; Nuclear energy, Detector readout; Event reconstruction; High-level triggers; Object reconstruction; Offline; Online event selection; Proton collisions; Trigger systems, Trigger circuits
Department/Centre:	Division of Physical & Mathematical Sciences > Centre for High Energy Physics
Date Deposited:	20 Nov 2021 11:30
Last Modified:	20 Nov 2021 11:30
URI:	http://eprints.iisc.ac.in/id/eprint/69839

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