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

CORC > 高能物理研究所 > 中国科学院高能物理研究所 > 粒子天体物理中心

	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
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.
学科主题	Instruments & Instrumentation
类目[WOS]	Instruments & Instrumentation
收录类别	SCI
语种	英语
WOS记录号	WOS:000345858500052
公开日期	2016-02-25
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/213827]
专题	高能物理研究所_粒子天体物理中心
作者单位	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	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).