Improvement of the Kalman Filter Fit of the ZEUS experiment

Details Improvement of the Kalman Filter Fit of the ZEUS experiment Improvement of the Kalman Filter Fit of the ZEUS experiment

2007-01-23

arxiv.org/abs/physics/0701271v1

Physics

Data Analysis, Statistics and Probability

23 pages, 12 figures

Scientific paper

At the center of the ZEUS detector situated on the collider HERA at DESY in Hamburg, a Micro Vertex Detector has been installed in 2000/01. Situated close to the beam line, this subdetector is designed to measure precisely the tracks near the interaction point (the vertex). A package called KFFIT is designated to perform the track fit of the Micro Vertex Detector hits using a Kalman Filter. This paper is a report of all improvements done in this package. After a brief description of the algorithm, the improvements of KFFIT will be presented comparing the last version (v10 released in December 2006) to the initial one (v1 released in December 2005 (=v2005a.1)).

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