Berlin 2005 – wissenschaftliches Programm

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HK: Physik der Hadronen und Kerne

HK 25: Physik mit schweren Ionen

HK 25.2: Vortrag

Dienstag, 8. März 2005, 14:30–14:45, TU MA144

Multi-strange Hyperon Production at CERN SPS^* — •M. Mitrovski¹, C. Alt¹, C. Blume¹, P. Dinkelaker¹, D. Flierl¹, V. Friese^2,3, M. Gazdzicki¹, F. Kramer¹, M. Kliemant¹, S. Kniege¹, I. Kraus², B. Lungwitz¹, C. Meurer¹, R. Renfordt¹, A. Richard¹, A. Sandoval², T. Schuster¹, R. Stock¹, C. Strabel¹ und H. Ströbele¹ — ¹Institut für Kernphysik, Universität Frankfurt — ²Gesellschaft für Schwerionenforschung (GSI), Darmstadt — ³Fachbereich Physik der Universität, Marburg

A study of the energy dependence of Ω and Ξ

(preliminary) production in central Pb+Pb collisions at CERN SPS energies are presented.

These measurements are performed using the large acceptance NA49 hadron spectrometer at the SPS which allows for precise determination of particle momenta and decay topologies.
Fully corrected rapidity and m_t spectra for Ξ at 40, 80 and 158 A·GeV and Ω at 40 and 158 A·GeV are obtained. From these spectra the total multiplicities can be derived and the results will be compared to various model predictions. It is found that the measured yields are close to the expectation of a statistical hadron gas model (grand canonical approximation) [1].
^* Supported by BMBF and GSI.

[1] F. Becattini et al., Phys.Rev. C69 (2004) 024905.