Multiplicity Fluctuations in Au+Au Collisions at RHIC

Details Multiplicity Fluctuations in Au+Au Collisions at RHIC Multiplicity Fluctuations in Au+Au Collisions at RHIC

2007-04-13

arxiv.org/abs/0704.1831v1

Phys.Rev.C76:031901,2007

Physics

Nuclear Physics

Nuclear Theory

7 pages, 3 figures, submitted to Phys. Rev. C (Rapid Communication)

Scientific paper

10.1103/PhysRevC.76.031901

The preliminary data of the PHENIX collaboration for the scaled variances of charged hadron multiplicity fluctuations in Au+Au at $\sqrt{s}=200$ GeV are analyzed within the model of independent sources. We use the HSD transport model to calculate the participant number fluctuations and the number of charged hadrons per nucleon participant in different centrality bins. This combined picture leads to a good agreement with the PHENIX data and suggests that the measured multiplicity fluctuations result dominantly from participant number fluctuations. The role of centrality selection and acceptance is discussed separately.

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