The centrality dependence of transverse-energy and charged-particle multiplicity at RHIC: Statistical model analysis
Institute of Theoretical Physics, University of Wrocław, Pl. Maksa Borna 9, 50-204, Wrocław, Poland
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Accepted: 5 November 2005
Published online: 22 November 2005
The transverse-energy and charged-particle multiplicity at midrapidity and their ratio are evaluated in a statistical model with the longitudinal and transverse flows for different centrality bins at RHIC at = 130 and 200 GeV. Full description of decays of hadron resonances is applied in these estimations. The predictions of the model at the freeze-out parameters, which were determined from measured particle yields and pT spectra, agree qualitatively well with the experimental data. The observed overestimation of the ratio can be explained for more central collisions by the redefinition of dN ch/dη|mid.
PACS: 25.75.-q Relativistic heavy-ion collisions – / 25.75.Dw Particle and resonance production – / 24.10.Pa Thermal and statistical models – / 24.10.Jv Relativistic models –
© Società Italiana di Fisica and Springer-Verlag, 2005