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CERN Heavy Ion Forum
System-Size Dependence of strange particle yields and spectra at 158 AGeV
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Europe/Zurich
160/1-009 (CERN)
Description
Strange hadron (K+, K-, phi, Lambda and Antilambda) and pion production is measured by the CERN-SPS experiment NA49 at 158 AGeV in p+p and central C+C, Si+Si and Pb+Pb collisions. The relative strangeness production in dependence on the system size shows a rapid rise followed by a saturation above approx. 65 participating nucleons.
This trend agrees qualitatively with the transition from canonical to grand canonical ensembles calculated in a statistical model. However, in the quantitative comparison the volume as relevant parameter fails. The importance of density will be discussed. Furthermore the chemical and thermal freeze-out parameters derived from model fits will be examined.
Organiser(s): Yiota Foka and Urs Achim Wiedemann
More information: Yiota Foka and Urs Achim Wiedemann
This trend agrees qualitatively with the transition from canonical to grand canonical ensembles calculated in a statistical model. However, in the quantitative comparison the volume as relevant parameter fails. The importance of density will be discussed. Furthermore the chemical and thermal freeze-out parameters derived from model fits will be examined.
Organiser(s): Yiota Foka and Urs Achim Wiedemann
More information: Yiota Foka and Urs Achim Wiedemann