Multiplicity Fluctuations in Au+Au Collisions at RHIC

Abstract

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.

arXiv comment7 pages, 3 figures, submitted to Phys. Rev. C (Rapid Communication)

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Cited by in corpus (8)

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• Fluctuations of the $K/\pi$ Ratio in Nucleus-Nucleus Collisions: Statistical and Transport Models
• Centrality bin size dependence of multiplicity correlation in central Au+Au collisions at $\sqrt{s_{N}N}$=200 GeV}
• Multiplicity Fluctuations in Nucleus-Nucleus Collisions: Dependence on Energy and Atomic Number
• Multiplicity Fluctuations in Limited Segments of Momentum Space in Statistical Models
• Eliminating $volume$ fluctuations in fixed-target heavy-ion experiments
• $K/\pi$, $K/p$ and $p/\pi$ Ratio Fluctuations within the HSD Transport Approach
• A Centrality-independent Framework for Revealing Genuine Higher-Order Cumulants in Heavy-Ion Collisions