Reconstruction and PID performance of the LHCb RICH detectors

被引：3
|
作者：
Powell, Andrew
机构：
[1] Denys Wilkinson Building, Oxford, OX1 3RH, Keble Road
来源：
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 2011年 / 639卷 / 01期
关键词：
RICH; Particle identification (PID); Performance monitoring; On-/off-line; ID/mis-ID rate;
D O I：
10.1016/j.nima.2010.09.048
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
Particle identification in the LHCb experiment is provided by two RICH detectors, covering a momentum range of approximately 1-100 GeV/c. To maintain the integrity of the LHCb physics performance, it is essential to measure and monitor the particle identification efficiency and misidentification fraction over time. To achieve this, the unique decay kinematics associated with K(s)(0) Lambda and phi decays are exploited to obtain high purity samples of pions, protons and kaons through the use of tracking information alone. Such calibration samples then allow for an unbiased assessment of the performance of the RICH detectors. Given the high production rates of K(s)(0) and phi mesons at the LHC, monitoring of the RICH detectors performance is possible both "on-line" during running and "off-line" after full-reconstruction of the data. Following analysis of the first LHC collisions, the performance of the LHCb RICH detectors will be presented based on a preliminary alignment of the detector. Identification and mis-identification probabilities as a function of track momentum will be shown. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码：260 / 263
页数：4
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