Köln 2004 – scientific programme

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HK: Physik der Hadronen und Kerne

HK 21: Heavy Ions II

HK 21.5: Talk

Tuesday, March 9, 2004, 16:45–17:00, F

System size dependence of strange hadron production at the SPS^* — •P. Dinkelaker¹, C. Alt¹, C. Blume¹, P. Buncic¹, D. Flierl¹, V. Friese^2,3, M. Gazdzicki¹, M. Kliemant¹, S. Kniege¹, I. Kraus², B. Lungwitz¹, C. Meurer¹, M. Mitrovski¹, C. Hoehne³, S. Radomski², R. Renfordt¹, A. Richard¹, A. Sandoval², R. Stock¹ und H. Ströbele¹ — ¹Institut für Kernphysik, Universität Frankfurt — ²Gesellschaft für Schwerionenforschung (GSI), Darmstadt — ³Fachbereich Physik der Universität, Marburg

It is well known that the relative production of strange hadrons in central Pb+Pb collisions is enhanced over elementary p+p collisions. To study the onset of this enhancement data were taken for different nuclei (C+C and Si+Si) and minimum bias Pb+Pb.
The NA49 collaboration presents data to clarify the system size dependence at 40 and 158 A·GeV. New data on the dependence of kaon production on centrality in Pb+Pb collisions at 40 A·GeV will be presented. The result will be compared to the centrality dependence of other hadron species at this energy and also at 158 A·GeV and the AGS energies.
The experimental results will be compared to dynamical and statistical model approaches. The available data will help to identify the possible onset of the observed differences and motivates a detailed energy scan program with light nuclei as a future project at the CERN SPS.
^*Supported by BMBF and GSI