Fast tracking for the second level trigger of the ATLAS experiment using silicon detectors data

被引：0

作者：

Schiavi, C ^{[1
]}

Cervetto, M ^{[1
]}

Parodi, E ^{[1
]}

Kostantinidis, N ^{[1
]}

Sutton, M ^{[1
]}

Baines, J ^{[1
]}

Emiluiyanov, D ^{[1
]}

Drevermann, H ^{[1
]}

机构：

[1] Dipartimento Fis, I-16146 Genoa, Italy

来源：

2004 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-7 | 2004年

关键词：

trigger; tracking;

D O I：

暂无

中图分类号：

TL [原子能技术]; O571 [原子核物理学];

学科分类号：

0827 ; 082701 ;

摘要：

Online track reconstruction is an important ingredient for the event selection at Large Hadron Collider (LHC) experiments. In the ATLAS experiment the first stage where this goal will be achievable is the software-based Second Level Trigger (LVL2). In this contribution we present an algorithm for fast pattern recognition and reconstruction of charged tracks and of the primary vertex in the framework of the High Level Trigger (HLT) of ATLAS. The pattern recognition makes extensive use of MC Look-Up-Tables to quickly identify, in the innermost layers of the ATLAS silicon detectors, triplets of space points reconstructed from hits produced by the same track. The reconstruction strategy is compared, in the ATLAS LVL2 framework, with an alternative tracking algorithm, showing the complementarity of the two approaches. The algorithm's performance is presented for different event topologies and luminosities, showing good tracking capabilities and uniform results within mean execution times which are compatible with the LVL2 requirements.

引用

页码：1841 / 1844

页数：4

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