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Performance of CMS muon reconstruction from proton-proton to heavy ion collisions

  • The CMS collaboration
  • Yerevan Physics Institute
  • Yerevan State University
  • Institut für Hochenergiephysik der OeAW
  • TU Wien
  • University of Antwerp
  • Arab Academy for Science, Technology and Maritime Transport
  • Vrije Universiteit Brussel
  • Université Libre de Bruxelles
  • Ghent University
  • Université catholique de Louvain
  • Centro Brasileiro de Pesquisas Fisicas
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Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

The performance of muon tracking, identification, triggering, momentum resolution, and momentum scale has been studied with the CMS detector at the LHC using data collected at √s NN= 5.02 TeV in proton-proton (pp) and lead-lead (PbPb) collisions in 2017 and 2018, respectively, and at √s NN= 8.16 TeV in proton-lead (pPb) collisions in 2016. Muon efficiencies, momentum resolutions, and momentum scales are compared by focusing on how the muon reconstruction performance varies from relatively small occupancy pp collisions to the larger occupancies of pPb collisions and, finally, to the highest track multiplicity PbPb collisions. We find the efficiencies of muon tracking, identification, and triggering to be above 90% throughout most of the track multiplicity range. The momentum resolution and scale are unaffected by the detector occupancy. The excellent muon reconstruction of the CMS detector enables precision studies across all available collision systems.

Original languageEnglish
Article numberP09012
JournalJournal of Instrumentation
Volume19
Issue number9
DOIs
StatePublished - 1 Sep 2024
Externally publishedYes

Keywords

  • Instrumentation and methods for heavy-ion reactions and fission studies
  • Large detector systems for particle and astroparticle physics
  • Muon spectrometers

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