Description and performance of track and primary-vertex reconstruction with the CMS tracker
CMS Collaboration
刊名JOURNAL OF INSTRUMENTATION
2014
卷号9
关键词SILICON PIXEL SENSORS PATTERN-RECOGNITION SIMULATION DETECTOR DESIGN EVENT CHIP
学科分类Instruments & Instrumentation
DOI10.1088/1748-0221/9/10/P10009
通讯作者Chatrchyan, S (reprint author), Yerevan Phys Inst, Yerevan 375036, Armenia.
英文摘要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 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.
类目[WOS]Instruments & Instrumentation
收录类别SCI
语种英语
WOS记录号WOS:000345858500052
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被引频次:39[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/213827
专题中国科学院高能物理研究所_粒子天体物理中心_期刊论文
作者单位中国科学院高能物理研究所
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CMS Collaboration. Description and performance of track and primary-vertex reconstruction with the CMS tracker[J]. JOURNAL OF INSTRUMENTATION,2014,9.
APA CMS Collaboration.(2014).Description and performance of track and primary-vertex reconstruction with the CMS tracker.JOURNAL OF INSTRUMENTATION,9.
MLA CMS Collaboration."Description and performance of track and primary-vertex reconstruction with the CMS tracker".JOURNAL OF INSTRUMENTATION 9(2014).
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