In this note we present a mathematical framework for a rigorous approach to a common track fit for trackers located in the inner region of the ZEUS detector. The approach makes use of the Kalman filter and offers a rigorous treatment of magnetic field inhomogeneity, multiple scattering and energy loss. We describe mathematical details of the implementation of the Kalman filter technique with a reduced amount of computations for a cylindrical drift chamber, barrel and forward silicon strip detectors and a forward straw drift chamber. Options with homogeneous and inhomogeneous field are discussed. The fitting of tracks in one ZEUS event takes about of 20ms on standard PC.
Cite
@article{arxiv.0812.1245,
title = {Mathematical Framework for Fast and Rigorous Track Fit for the ZEUS Detector},
author = {Alexander Spiridonov},
journal= {arXiv preprint arXiv:0812.1245},
year = {2008}
}