Performance of CMS muon reconstruction in pp collision events at sqrt(s) = 7 TeV

S. Chatrchyan D. Sillou 1 M. Besancon 2 S. Choudhury 2 M. Dejardin 2 D. Denegri 2 B. Fabbro 2 J.L. Faure 2 F. Ferri 2 S. Ganjour 2 A. Givernaud 2 P. Gras 2 G. Hamel De Monchenault 2 P. Jarry 2 E. Locci 2 J. Malcles 2 L. Millischer 2 J. Rander 2 A. Rosowsky 2 I. Shreyber 2 M. Titov 2 S. Baffioni 3 F. Beaudette 3 L. Benhabib 3 L. Bianchini 3 M. Bluj 3 C. Broutin 3 Pierre Busson 3 C. Charlot 3 N. Daci 3 T. Dahms 3 L. Dobrzynski 3 S. Elgammal 3 R. Granier De Cassagnac 3 M. Haguenauer 3 P. Mine 3 C. Mironov 3 C. Ochando 3 P. Paganini 3 D. Sabes 3 R. Salerno 3 Y. Sirois 3 C. Thiebaux 3 C. Veelken 3 A. Zabi 3 J.-L. Agram 4 J. Andrea 4 D. Bloch 4 D. Bodin 4 J.-M. Brom 4 M. Cardaci 4 E.C. Chabert 4 C. Collard 4 E. Conte 4 F. Drouhin 4 C. Ferro 4 J.-C. Fontaine 4 D. Gele 4 U. Goerlach 4 P. Juillot 4 M. Karim 4 A.-C. Le Bihan 4 P. Van Hove 4 F. Fassi 5 D. Mercier 5 C. Baty 6 S. Beauceron 6 N. Beaupere 6 M. Bedjidian 6 O. Bondu 6 G. Boudoul 6 D. Boumediene 6 H. Brun 6 J. Chasserat 6 R. Chierici 6 D. Contardo 6 P. Depasse 6 H. El Mamouni 6 A. Falkiewicz 6 J. Fay 6 S. Gascon 6 M. Gouzevitch 6 B. Ille 6 T. Kurca 6 T. Le Grand 6 M. Lethuillier 6 L. Mirabito 6 S. Perries 6 V. Sordini 6 S. Tosi 6 Y. Tschudi 6 P. Verdier 6 S. Viret 6 M. Boutemeur 7
Abstract : The performance of muon reconstruction, identification, and triggering in CMS has been studied using 40 inverse picobarns of data collected in pp collisions at sqrt(s) = 7 TeV at the LHC in 2010. A few benchmark sets of selection criteria covering a wide range of physics analysis needs have been examined. For all considered selections, the efficiency to reconstruct and identify a muon with a transverse momentum pT larger than a few GeV is above 95% over the whole region of pseudorapidity covered by the CMS muon system, abs(eta)<2.4, while the probability to misidentify a hadron as a muon is well below 1%. The efficiency to trigger on single muons with pT above a few GeV is higher than 90% over the full eta range, and typically substantially better. The overall momentum scale is measured to a precision of 0.2% with muons from Z decays. The transverse momentum resolution varies from 1% to 6% depending on pseudorapidity for muons with pT below 100 GeV and, using cosmic rays, it is shown to be better than 10% in the central region up to pT = 1 TeV. Observed distributions of all quantities are well reproduced by the Monte Carlo simulation.
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Journal articles
Journal of Instrumentation, Institute of Physics: Hybrid Open Access, 2012, 7, pp.P10002. <10.1088/1748-0221/7/10/P10002>


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Submitted on : Wednesday, June 20, 2012 - 8:00:27 AM
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S. Chatrchyan, D. Sillou, M. Besancon, S. Choudhury, M. Dejardin, et al.. Performance of CMS muon reconstruction in pp collision events at sqrt(s) = 7 TeV. Journal of Instrumentation, Institute of Physics: Hybrid Open Access, 2012, 7, pp.P10002. <10.1088/1748-0221/7/10/P10002>. <in2p3-00710068>

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