Centrality Dependence of Thermal Parameters in Heavy-Ion Collisions at CERN-SPS
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The centrality dependence of thermal parameters, characterizing the hadron multiplicities, is determined phenomenologically for lead-on-lead collisions at CERN-SPS for a beam energy of 158 AGeV. The strangeness equilibration factor shows a clear, approximately linear, increase with increasing centrality, while the freeze-out temperature and chemical potential remain constant.
3 pages, 2 tables, 5 figures
3 pages, 2 tables, 5 figures