Centrality Dependence of Multiplicity Fluctuations from a Hydrodynamical Approach

Figure 2

(Color online.) The centrality dependence of the calculated higher moments of multiplicity of net charge. The results are for Au+Au collisions at 200 GeV. The STAR data are from Ref. [27], presented by filled red stars. The SPheRIO results are shown in the filled blue circle, and the dashed black line gives that from the HRG calculations process. To be specific, we further investigate the effect of the IC, as well as the temporal expansion of the system. The hydrodynamical model employed in the study does not contain any additional free parameters, as the existing ones have been determined in reproducing the particle spectra in previous studies.