SMuK 2023 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 68: Hadron Structure and Spectroscopy IX
HK 68.4: Vortrag
Donnerstag, 23. März 2023, 16:45–17:00, SCH/A419
Hyperon Reconstruction with Realistic Track Finding for PANDA — •Anna Alicke1, Tobias Stockmanns3, and James Ritman2,1,3 — 1Ruhr-Universität Bochum, Experimentalphysik, Lehrstuhl I — 2GSI Helmholtzzentrum für Schwerionenforschung — 3Forschungszentrum Jülich, Institut für Kernphysik
One main research topic of the PANDA experiment is the spectroscopy of excited hyperon states. Hyperons, such as Ξ, have a large decay length of several cm and further decay into Λ particles, which have a similarly long lifetime. Consequently, hyperons have a distinctive decay pattern consisting of final state particles that have a displaced secondary vertex. These tracks, which do not originate from the primary interaction point (IP), make track reconstruction and the subsequent event reconstruction challenging. In contrast to primary track finders, which use the IP, secondary track finders have to deal with a much higher combination of hits and are lacking this additional constraint to the IP. Consequently, the track finding efficiency and the momentum resolution for secondary tracks is worse than for primary tracks and usually require more computational power. Up to now, the PANDA experiment was lacking a dedicated track finder for secondary particles. Therefore, hyperon reactions have only been investigated using ideal track finding in PANDA. This work presents the new secondary track finder and its application on the reaction pp → Ξ(1820)−Ξ+. The expected reconstruction rate to observe the Ξ(1820)− resonance will be shown.