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CRIS Current Research Information System
A 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 primaryinteraction
vertices. Despite the very hostile environment at the LHC, the performance obtained
with these algorithms is found to be excellent. For tt events under typical 2011 pileup conditions,
the average track-reconstruction efficiency for promptly-produced charged particles with transverse
momenta of pT > 0:9GeV is 94% for pseudorapidities of jhj < 0:9 and 85% for 0:9 < jhj <
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 pT = 100GeV emitted at jhj < 1:4, the resolutions are approximately 2.8% in pT, and
respectively, 10mm and 30mm in the transverse and longitudinal impact parameters. The position
resolution achieved for reconstructed primary vertices that correspond to interesting pp collisions
is 10–12mm 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.
S Chatrchyan, V Khachatryan, A M Sirunyan, A Tumasyan,
W Adam, T Bergauer, et al. (2014). Description and performance of track and
primary-vertex reconstruction with the CMS tracker. JOURNAL OF INSTRUMENTATION, 9, P10009-1-P10009-80 [10.1088/1748-0221/9/10/P10009].
Description and performance of track and
primary-vertex reconstruction with the CMS tracker
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2014
Abstract
A 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 primaryinteraction
vertices. Despite the very hostile environment at the LHC, the performance obtained
with these algorithms is found to be excellent. For tt events under typical 2011 pileup conditions,
the average track-reconstruction efficiency for promptly-produced charged particles with transverse
momenta of pT > 0:9GeV is 94% for pseudorapidities of jhj < 0:9 and 85% for 0:9 < jhj <
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 pT = 100GeV emitted at jhj < 1:4, the resolutions are approximately 2.8% in pT, and
respectively, 10mm and 30mm in the transverse and longitudinal impact parameters. The position
resolution achieved for reconstructed primary vertices that correspond to interesting pp collisions
is 10–12mm 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.
S Chatrchyan, V Khachatryan, A M Sirunyan, A Tumasyan,
W Adam, T Bergauer, et al. (2014). Description and performance of track and
primary-vertex reconstruction with the CMS tracker. JOURNAL OF INSTRUMENTATION, 9, P10009-1-P10009-80 [10.1088/1748-0221/9/10/P10009].
S Chatrchyan; V Khachatryan; A M Sirunyan; A Tumasyan;
W Adam; T Bergauer; M Dragicevic; J Erö; C Fabjan; M Friedl; R Frühwirth; V M Ghete; C Hartl; ...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/416966
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simulazione ASN
Il report seguente simula gli indicatori relativi alla propria produzione scientifica in relazione alle soglie ASN 2023-2025 del proprio SC/SSD. Si ricorda che il superamento dei valori soglia (almeno 2 su 3) è requisito necessario ma non sufficiente al conseguimento dell'abilitazione. La simulazione si basa sui dati IRIS e sugli indicatori bibliometrici alla data indicata e non tiene conto di eventuali periodi di congedo obbligatorio, che in sede di domanda ASN danno diritto a incrementi percentuali dei valori. La simulazione può differire dall'esito di un’eventuale domanda ASN sia per errori di catalogazione e/o dati mancanti in IRIS, sia per la variabilità dei dati bibliometrici nel tempo. Si consideri che Anvur calcola i valori degli indicatori all'ultima data utile per la presentazione delle domande.
La presente simulazione è stata realizzata sulla base delle specifiche raccolte sul tavolo ER del Focus Group IRIS coordinato dall’Università di Modena e Reggio Emilia e delle regole riportate nel DM 589/2018 e allegata Tabella A. Cineca, l’Università di Modena e Reggio Emilia e il Focus Group IRIS non si assumono alcuna responsabilità in merito all’uso che il diretto interessato o terzi faranno della simulazione. Si specifica inoltre che la simulazione contiene calcoli effettuati con dati e algoritmi di pubblico dominio e deve quindi essere considerata come un mero ausilio al calcolo svolgibile manualmente o con strumenti equivalenti.