Description and performance of track and primary-vertex reconstruction with the CMS tracker

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dc.authoridObraztsov, Stepan/0009-0001-1152-2758
dc.authoridArneodo, Michele/0000-0002-7790-7132
dc.authoridSenkin, Sergey/0000-0001-5848-005X
dc.authoridDe Jesus Damiao, Dilson/0000-0002-3769-1680
dc.authoridForthomme, Laurent/0000-0002-3302-336X
dc.authoridGodinovic, Nikola/0000-0002-4674-9450
dc.authoridMarconi, Sara/0000-0001-6125-9751
dc.contributor.authorChatrchyan, S.
dc.contributor.authorKhachatryan, V.
dc.contributor.authorSirunyan, A. M.
dc.contributor.authorTumasyan, A.
dc.contributor.authorAdam, W.
dc.contributor.authorBergauer, T.
dc.contributor.authorThe CMS Collaboration
dc.date.accessioned2025-03-07T20:13:00Z
dc.date.available2025-03-07T20:13:00Z
dc.date.issued2014
dc.departmentÇağ Üniversitesi
dc.description.abstractA description is provided of the software algorithms developed for the CMS tracker both for reconstructing charged-particle trajectories in proton-proton interactions and for using the resulting tracks to estimate the positions of the LHC luminous region and individual primary-interaction vertices. Despite the very hostile environment at the LHC, the performance obtained with these algorithms is found to be excellent. For t (t) over bar events under typical 2011 pileup conditions, the average track-reconstruction efficiency for promptly-produced charged particles with transverse momenta of p(T) > 0.9GeV is 94% for pseudorapidities of vertical bar eta vertical bar < 0.9 and 85% for 0.9 < vertical bar eta vertical bar < 2.5. The inefficiency is caused mainly by hadrons that undergo nuclear interactions in the tracker material. For isolated muons, the corresponding efficiencies are essentially 100%. For isolated muons of p(T) = 100GeV emitted at vertical bar eta vertical bar < 1.4, the resolutions are approximately 2.8% in p(T), and respectively, 10 m m and 30 mu m in the transverse and longitudinal impact parameters. The position resolution achieved for reconstructed primary vertices that correspond to interesting pp collisions is 10-12 mu m in each of the three spatial dimensions. The tracking and vertexing software is fast and flexible, and easily adaptable to other functions, such as fast tracking for the trigger, or dedicated tracking for electrons that takes into account bremsstrahlung.
dc.description.sponsorshipDirect For Mathematical & Physical Scien; Division Of Physics [1151640, 1306951, 1314131] Funding Source: National Science Foundation; Division Of Physics; Direct For Mathematical & Physical Scien [1120138, 1205960, 1306953, 0906479, 1306040] Funding Source: National Science Foundation; STFC [ST/I005912/1, ST/L00609X/1, ST/J005665/1, ST/F007094/1, ST/J004901/1, ST/L006340/1, ST/I505572/1, ST/K003844/1, ST/H00081X/2] Funding Source: UKRI
dc.identifier.doi10.1088/1748-0221/9/10/P10009
dc.identifier.issn1748-0221
dc.identifier.scopus2-s2.0-84908341975
dc.identifier.scopusqualityQ2
dc.identifier.urihttps://doi.org/10.1088/1748-0221/9/10/P10009
dc.identifier.urihttps://hdl.handle.net/20.500.12507/2852
dc.identifier.volume9
dc.identifier.wosWOS:000345858500052
dc.identifier.wosqualityQ2
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherIop Publishing Ltd
dc.relation.ispartofJournal of Instrumentation
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/openAccess
dc.snmzKA_WoS_20241226
dc.subjectPattern recognition, cluster finding, calibration and fitting methods
dc.subjectLarge detector-systems performance
dc.subjectPerformance of High Energy Physics Detectors
dc.titleDescription and performance of track and primary-vertex reconstruction with the CMS tracker
dc.typeArticle

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