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Pileup mitigation at CMS in 13 TeV data

CMS Collaboration; Sirunyan, A.M.; Tumasyan, A.; Adam, W.; Ambrogi, F.; Bergauer, T.; Dragicevic, M.; Erö, J.; Valle, A. Escalante Del; Flechl, M.; Frühwirth, R.; Jeitler, M.; Krammer, N.; Krätschmer, I.; Liko, D.; Madlener, T.; Mikulec, I.; Rad, N.; Schieck, J.; Schöfbeck, R.; Spanring, M.; ... mehr

With increasing instantaneous luminosity at the LHC come additional reconstruction challenges. At high luminosity, many collisions occur simultaneously within one proton-proton bunch crossing. The isolation of an interesting collision from the additional "pileup" collisions is needed for effective physics performance. In the CMS Collaboration, several techniques capable of mitigating the impact of these pileup collisions have been developed. Such methods include charged-hadron subtraction, pileup jet identification, isospin-based neutral particle "δβ" correction, and, most recently, pileup per particle identification. This paper surveys the performance of these techniques for jet and missing transverse momentum reconstruction, as well as muon isolation. The analysis makes use of data corresponding to 35.9 fb$^{-1}$ collected with the CMS experiment in 2016 at a center-of-mass energy of 13 TeV. The performance of each algorithm is discussed for up to 70 simultaneous collisions per bunch crossing. Significant improvements are found in the identification of pileup jets, the jet energy, mass, and angular resolution, missing transverse momentum resolution, and muon isolation when using pileup per particle identification.

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Verlagsausgabe §
DOI: 10.5445/IR/1000126899
Veröffentlicht am 27.11.2020
DOI: 10.1088/1748-0221/15/09/P09018
Zitationen: 2
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Astroteilchenphysik (IAP)
Institut für Experimentelle Kernphysik (IEKP)
Institut für Experimentelle Teilchenphysik (ETP)
Institut für Technik der Informationsverarbeitung (ITIV)
Institut für Telematik (TM)
Institut für Theoretische Teilchenphysik (TTP)
Institut für Thermische Energietechnik und Sicherheit (ITES)
KIT-Zentrum Elementarteilchen- und Astroteilchenphysik (KCETA)
Steinbuch Centre for Computing (SCC)
Institut für Prozessdatenverarbeitung und Elektronik (IPE)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2020
Sprache Englisch
Identifikator ISSN: 1748-0221
KITopen-ID: 1000126899
Erschienen in Journal of Instrumentation
Band 15
Heft 9
Seiten Art. Nr.: P09018
Vorab online veröffentlicht am 15.09.2020
Schlagwörter Calorimeter methods, Calorimeters, Large detector-systems performance
Nachgewiesen in Scopus
Web of Science
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