Physics – Nuclear Physics – Nuclear Experiment
Scientific paper
2009-06-02
Phys.Rev.C80:034906,2009
Physics
Nuclear Physics
Nuclear Experiment
13 pages, 12 figures. Revised version as accepted by Phys. Rev. C
Scientific paper
10.1103/PhysRevC.80.034906
Results on Lambda, Anti-lambda, and Xi- production in centrality selected Pb+Pb reactions at 40A and 158A GeV and in near-central C+C and Si+Si reactions at 158A GeV are presented. Transverse mass spectra, rapidity spectra, and multiplicities in dependence of the system size are discussed. Comparisons to transport models (UrQMD2.3 and HSD) and to the core-corona approach are performed. While Lambda and Anti-lambda production can be described by transport models reasonably well, these models do not agree with the Xi- measurements. On the other hand, the core-corona picture fits very well the system-size dependence of Lambda and Xi-, while it agrees less well with the Anti-lambda data.
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