SMuK 2023 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 46: Heavy-Ion Collisions and QCD Phases IX
HK 46.5: Vortrag
Mittwoch, 22. März 2023, 18:45–19:00, SCH/A216
Performance test of the KF Particle vertexing package for open heavy flavour baryon reconstruction with the ALICE detector — •Phil Stahlhut for the ALICE Germany collaboration — Physikalisches Institut, Universität Heidelberg
The study of charm baryon production is crucial to understand charm hadronisation processes in a parton-rich environment. In order to extract signal even in low transverse momentum (pT) regions where the signal-to-background ratio is rapidly decreasing, a precise vertex reconstruction is of upmost importance.
The Kalman Filter Particle package gives a fast reconstruction of complex decay topologies providing a full description of the decay particle both at its production and decay vertex. It is suitable even for high-density track environments. In addition to that, the KF Particle package supports the use of geometrical, mass and topological constraints in the reconstruction process and includes the complete treatment of tracking and vertexing uncertainties.
In this work, the KF Particle package was used to reconstruct the Ξc+ baryon from its decay to Ξ−π+π+ in simulated proton–proton collisions at a center-of-mass energy of √s=13 TeV. This contribution will demonstrate the effect of geometrical, mass and topological constraints on the secondary vertex, pT and mass resolution of the reconstructed Ξc+ baryon.