Abstract
The system-size dependence of particle production in heavy-ion collisions at the top energy at the CERN Super Proton Synchrotron is analyzed in terms of the statistical model. A systematic comparison is made of two suppression mechanisms that quantify strange-particle yields in ultrarelativistic heavy-ion collisions: the canonical model with strangeness correlation radius determined from the data and the model formulated in the canonical ensemble using chemical off-equilibrium strangeness suppression factor. The system-size dependence of the correlation radius and the thermal parameters are obtained for p-p, C-C, Si-Si, and Pb-Pb collisions at {radical}(s{sub NN})=17.3A GeV. It is shown that on the basis of a consistent set of data there is no clear difference between the two suppression patterns. In the present study, the strangeness correlation radius was found to exhibit a rather weak dependence on the system size.
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