Real-time alignment and reconstruction: performance and recent developments at the LHCb experiment
Real-time alignment and reconstruction: performance and recent developments at the LHCb experiment
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实时对准和重建：LHCb 实验的性能和最新进展
DOI：
10.1088/1742-6596/1085/4/042003
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
M. Sokoloff
中科院分区：
文献类型：
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作者：
A. Dziurda;Lucia Grillo;F. Polci;M. Sokoloff
LHCb探测器是一种单臂前向光谱仪，设计用于c-和b-强子的有效重构衰变。LHCb为LHC Run II引入了一种新的实时探测器对准和校准策略。在填充开始时收集的数据将在几分钟内进行处理，并用于更新校准，同时为每次运行评估校准常数。这是使完全包含粒子识别选择标准的Run-II软件触发器的重建质量与Run-I的离线质量相当的关键因素之一。这种方法大大提高了效率，特别是对魅力和奇异强子衰变的选择。我们讨论了这种新方法的策略和性能，然后介绍了2017年数据采集运行的最新进展，以及LHC run - ii中LHCb实验实现的性能和重建质量。
The LHCb detector is a single-arm forward spectrometer designed for the efficient reconstruction decays of c- and b-hadrons. LHCb has introduced a novel real-time detector alignment and calibration strategy for LHC Run II. Data collected at the start of the fill are processed in a few minutes and used to update the alignment, while the calibration constants are evaluated for each run. This is one of the key elements which allow the reconstruction quality of the software trigger in Run-II, which fully includes the particle identification selection criteria, to be as good as the offline quality of Run-I. This approach greatly increases the efficiency, in particular for the selection of charm and strange hadron decays. We discuss strategy and performance of this novel approach, followed by a presentation of the recent developments implemented for the 2017 run of data taking, and with the performance and reconstruction quality achieved by the LHCb experiment in LHC Run-II.