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Update of an Object Oriented Track Reconstruction Model for LHC Experiments

机译:LHC实验的面向对象的轨道重建模型的更新

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In this update report about an Object Oriented (OO) track reconstruction model, which was presented at CHEP'97, CHEP'98 and CHEP'2000, we shall describe subsequent new developments since the beginning of year 2000. The OO model for the Kalman filtering method has been designed for high energy physics experiments at high luminosity hadron colliders. It has been coded in the C++ programming language originally for the CMS experiment at the future Large Hadron Collider (LHC) at CERN, and later has been successfully implemented into three different OO computing environments (including the level-2 trigger and offline software systems) of the ATLAS (another major experiment at LHC). For the level-2 trigger software environment, we shall selectively present some latest performance results (e.g. the B-physics event selection for ATLAS level-2 trigger, the robustness study result, etc.). For the offline environment, we shall present a new 3-D space point package which provides the essential offline input. A major development after CHEP'2000 is the implementation of the OO model into the new OO software framework "Athena" of ATLAS experiment. The new modularization of this OO package enables the model to be more flexible and to be more easily implemented into different software environments. Also it provides the potential to handle the more complicated realistic situation (e.g. to include the calibration correction and the alignment correction, etc.). Some general interface issues (e.g. design of the common track class) of the algorithms to different framework environments have been investigated by using this OO package.
机译:在CHEP'97,CHEP'98和CHEP'2000上发布的有关面向对象(OO)轨道重建模型的更新报告中,我们将描述自2000年初以来的后续新发展。Kalman的OO模型在高光强强子对撞机的高能物理实验中设计了滤波方法。它最初使用C ++编程语言进行编码,最初是为将来在CERN的大型强子对撞机(LHC)进行CMS实验而使用的,后来成功地实现了三种不同的OO计算环境(包括2级触发器和离线软件系统) ATLAS(大型强子对撞机的另一项主要实验)。对于2级触发软件环境,我们将选择性地提供一些最新的性能结果(例如,ATLAS 2级触发的B物理事件选择,鲁棒性研究结果等)。对于离线环境,我们将介绍一个新的3-D空间点包,该包将提供基本的离线输入。 CHEP'2000之后的一个重大发展是将OO模型实施到ATLAS实验的新OO软件框架“ Athena”中。此OO软件包的新模块化功能使该模型更加灵活,并且可以更轻松地在不同的软件环境中实现。它还提供了处理更复杂的现实情况的潜力(例如,包括校准校正和对齐校正等)。通过使用此OO软件包,已经研究了算法针对不同框架环境的一些一般接口问题(例如,公共轨道类的设计)。

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