Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2007-07-26
Phys.Rev.C76:064903,2007
Physics
High Energy Physics
High Energy Physics - Phenomenology
9 pages, 8 figures, submitted to Physical Review C
Scientific paper
10.1103/PhysRevC.76.064903
The system-size dependence of particle production in heavy-ion collisions at the top SPS energy is analyzed in terms of the statistical model. A systematic comparison is made of two suppression mechanisms that quantify strange particle yields in ultra-relativistic 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 sqrt(s_NN) = 17.3 AGeV. 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.
Cleymans Jean
Kraus Ingrid
Oeschler Helmut
Redlich Krzysztof
Wheaton Spencer
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