Darmstadt 2016 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 45: Postersession

HK 45.28: Poster

Mittwoch, 16. März 2016, 18:30–20:30, S1/05 22-24

Centrality Determination in Au-Au Collisions at 1.23 AGeV with HADES — •Maximilian Zuschke for the HADES collaboration — Institut für Kernphysik, Goethe-Universität Frankfurt

An important characterization of events in heavy-ion physics is the centrality. It classifies events by considering the collision's cross section relative to the total cross section of the system. This characteristics is needed for many analyses, as it provides indirect information about the initial geometrical reaction properties. As the production rate of particles is a function of the deposited energy, which itself depends on the centrality, quantities based on measured multiplicities allow to draw conclusions about the centrality of a collision.

Estimators used to determine the centrality for Au-Au collisions at 1.23 AGeV recorded with HADES include the charged particle multiplicity and hit multiplicities measured with various detectors, such as the TOF/RPC or forward wall.

Calibration methods accounting for variations in the acceptance of the detectors are introduced and verified by comparison with the theoretical expectations, as obtained by calculations with the Glauber-Model.

This work has been supported by BMBF (05P12RFGHJ,05P15RFFCA ), GSI and HIC for FAIR.