The muon trigger system of the CMS experiment uses a combination of hardware and software to identify events containing a muon. During Run 2 (covering 2015-2018) the LHC achieved instantaneous luminosities as high as 2 × 10 cm s while delivering proton-proton collisions at √s = 13 TeV. The challenge for the trigger system of the CMS experiment is to reduce the registered event rate from about 40 MHz to about 1 kHz. Significant improvements important for the success of the CMS physics program have been made to the muon trigger system via improved muon reconstruction and identification algorithms since the end of Run 1 and throughout the Run 2 data-taking period. The new algorithms maintain the acceptance of the muon triggers at the same or even lower rate throughout the data-taking period despite the increasing number of additional proton-proton interactions in each LHC bunch crossing. In this paper, the algorithms used in 2015 and 2016 and their improvements throughout 2017 and 2018 are described. Measurements of the CMS muon trigger performance for this data-taking period are presented, including efficiencies, transverse momentum resolution, trigger rates, and the purity of the selected muon sample. This paper focuses on the single- and double-muon triggers with the lowest sustainable transverse momentum thresholds used by CMS. The efficiency is measured in a transverse momentum range from 8 to several hundred GeV.

Performance of the CMS muon trigger system in proton-proton collisions at sqrt(s) = 13 TeV / Sirunyan, A.M., Tumasyan, A., Adam, W., Bergauer, T., Dragicevic, M., Escalante Del Valle, A., Fruhwirth, R., Jeitler, M., Krammer, N., Lechner, L., Liko, D., Mikulec, I., Pitters, F.M., Schieck, J., Schofbeck, R., Spanring, M., Templ, S., Waltenberger, W., Wulz, C.-E., Zarucki, M., et al.. - In: JOURNAL OF INSTRUMENTATION. - ISSN 1748-0221. - 16:7(2021), p. P07001. [10.1088/1748-0221/16/07/P07001]

Performance of the CMS muon trigger system in proton-proton collisions at sqrt(s) = 13 TeV

Cipriani M.;Del Re D.;Longo E.;Organtini G.;Paramatti R.;Quaranta C.;Rahatlou S.;Santanastasio F.;Tramontano R.;
2021

Abstract

The muon trigger system of the CMS experiment uses a combination of hardware and software to identify events containing a muon. During Run 2 (covering 2015-2018) the LHC achieved instantaneous luminosities as high as 2 × 10 cm s while delivering proton-proton collisions at √s = 13 TeV. The challenge for the trigger system of the CMS experiment is to reduce the registered event rate from about 40 MHz to about 1 kHz. Significant improvements important for the success of the CMS physics program have been made to the muon trigger system via improved muon reconstruction and identification algorithms since the end of Run 1 and throughout the Run 2 data-taking period. The new algorithms maintain the acceptance of the muon triggers at the same or even lower rate throughout the data-taking period despite the increasing number of additional proton-proton interactions in each LHC bunch crossing. In this paper, the algorithms used in 2015 and 2016 and their improvements throughout 2017 and 2018 are described. Measurements of the CMS muon trigger performance for this data-taking period are presented, including efficiencies, transverse momentum resolution, trigger rates, and the purity of the selected muon sample. This paper focuses on the single- and double-muon triggers with the lowest sustainable transverse momentum thresholds used by CMS. The efficiency is measured in a transverse momentum range from 8 to several hundred GeV.
2021
Large detector systems for particle and astroparticle physics; Muon spectrometers; Trigger detectors
01 Pubblicazione su rivista::01a Articolo in rivista
Performance of the CMS muon trigger system in proton-proton collisions at sqrt(s) = 13 TeV / Sirunyan, A.M., Tumasyan, A., Adam, W., Bergauer, T., Dragicevic, M., Escalante Del Valle, A., Fruhwirth, R., Jeitler, M., Krammer, N., Lechner, L., Liko, D., Mikulec, I., Pitters, F.M., Schieck, J., Schofbeck, R., Spanring, M., Templ, S., Waltenberger, W., Wulz, C.-E., Zarucki, M., et al.. - In: JOURNAL OF INSTRUMENTATION. - ISSN 1748-0221. - 16:7(2021), p. P07001. [10.1088/1748-0221/16/07/P07001]
File allegati a questo prodotto
File Dimensione Formato  
The CMS collaboration_Performance of the CMS_2021.pdf

accesso aperto

Tipologia: Versione editoriale (versione pubblicata con il layout dell'editore)
Licenza: Creative commons
Dimensione 1.37 MB
Formato Adobe PDF
1.37 MB Adobe PDF

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1627594
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 34
  • ???jsp.display-item.citation.isi??? 6
social impact