Eur. Phys. J. A (2005) 26: 277-284
https://doi.org/10.1140/epja/i2004-10307-2

Original Article

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

^* e-mail: prorok@ift.uni.wroc.pl

Received: 28 December 2004
Accepted: 5 November 2005
Published online: 22 November 2005

Abstract

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 p_T 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.