Wuppertal 2015 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 16: Spur- und Myondetektoren 1

T 16.2: Vortrag

Montag, 9. März 2015, 14:15–14:30, K.12.18 (K3)

Global track finder for Belle II experiment — •Viktor Trusov, Michael Feindt, Martin Heck, Thomas Kuhr, and Pablo Goldenzweig for the Belle II collaboration — Karlsruhe Institute of Technology, IEKP

We present an implementation of a method based on the Legendre transformation for reconstruction charged particle tracks in the central drift chamber of the Belle II experiment. The method is designed for fast track finding and restoring circular patterns of track hits in transverse plane. It is done by searching for common tangents to drift circles of hits in the conformal space. With known transverse trajectories longitudinal momentum estimation performed by assigning stereohits followed by determination of the track parameters. The method includes algorithms responsible for track quality estimation and reduction of rate of fakes.

The work is targeting at increasing the efficiency and reducing the execution time because the computing power available to the experiment is limited. The algorithm is developed within the Belle II software environment with using Monte-Carlo simulation for probing its efficiency.