München 2019 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 35: Heavy-Ion Collisions and QCD Phases VII
HK 35.2: Vortrag
Mittwoch, 20. März 2019, 14:30–14:45, HS 12
Application of the fast vectorised Kalman filter based track fit to the STAR experiment — •Artemiy Belousov1, Yuri Fisyak3, Ivan Kisel1,2, and Maksym Zyzak2 for the CBM collaboration — 1FIAS — 2GSI — 3Brookhaven National Laboratory
Modern experiments in high energy physics tend to increase the amount of data to be processed, thus, the execution speed of the algorithms becomes crucial. However, the efficiency and precision of the applied procedures cannot be compromised. Therefore, the Kalman filter method is usually used as a basis in particle tracks reconstruction, since it satisfies the above-mentioned requirements.
Current implementation of the Kalman filter method for reconstruction of charged particle trajectories is added to the TPC CA track finder of the STAR experiment within the FAIR Phase 0 program. The algorithm will be applied in the High Level Trigger of STAR during the Beam Energy Scan II (BES II) program, which requires high operational speed. At the same time, quality of the fitting procedure should stay high. The developed Kalman filter based track fit uses all specific technical data we can capture from a detector. Therefore we improve the quality of the fitting procedure.
As a part of the preparation for the BES II program the track fitting procedure is required to be extended to the outer ToF and MTD detectors, where the magnetic field and the TPC gas parameters are not homogeneous. The Kalman filter based track fit was modified to cope with these complicated conditions. It shows correct distributions of track parameter residuals and pulls, and χ2.