Primary vertex reconstruction in the ATLAS experiment at LHC

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Abstract

In the harsh environment of the Large Hadron Collider at CERN (design luminosity of 1034 cm-2s-1) efficient reconstruction of the signal primary vertex is crucial for many physics analyses. Described in this paper are primary vertex reconstruction strategies implemented in the ATLAS software framework Athena. The implementation of the algorithms follows a very modular design based on object oriented C++ and the use of abstract interfaces. This guarantees the easy use and exchange of different vertex fitters and finders which are considered for a given analysis. Such a modular approach relies on a dedicated Event Data Model for vertex reconstruction. The data model has been developed alongside the reconstruction algorithms. Its design is presented in detail. The performance of the implemented primary vertex reconstruction algorithms has been studied on a variety of Monte Carlo samples and results are presented. © 2008 IOP Publishing Ltd.

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Piacquadio, G., Prokofiev, K., & Wildauer, A. (2008). Primary vertex reconstruction in the ATLAS experiment at LHC. In Journal of Physics: Conference Series (Vol. 119). Institute of Physics Publishing. https://doi.org/10.1088/1742-6596/119/3/032033

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