Searching for the Critical Point of QCD: Theoretical Benchmark Calculations

Abstract

We present a comprehensive study of event-by-event multiplicity fluctuations in nucleon-nucleon and nucleus-nucleus interactions from AGS/FAIR to RHIC energies within the UrQMD transport approach. The scaled variances of negative, positive, and all charged hadrons are analysed. The scaled variance in central Pb+Pb collisions increases with energy and behaves similar to inelastic p+p interactions. We find a non-trivial dependence of multiplicity fluctuations on the rapidity and transverse momentum interval used for the analysis and on the centrality selection procedure. Quantitative predictions for the NA49 experiment are given, taking into account the acceptance of the detector and the selection procedure of central events.

arXiv comment10 pages, 10 figures

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Cited by in corpus (14)

• Charged hadron multiplicity fluctuations in Au+Au and Cu+Cu collisions from sqrt(s_NN) = 22.5 to 200 GeV
• Energy Dependence of Multiplicity Fluctuations in Heavy Ion Collisions at the CERN SPS
• Quark number susceptibility around the critical end point
• Fluctuations of the $K/\pi$ Ratio in Nucleus-Nucleus Collisions: Statistical and Transport Models
• Fluctuations as a test of chemical non-equilibrium at the LHC
• Multiplicity Fluctuations in Nucleus-Nucleus Collisions: Dependence on Energy and Atomic Number
• The Quark Number Susceptibility in Hard-Thermal-Loop Approximation
• Multiplicity Fluctuations in Limited Segments of Momentum Space in Statistical Models
• Energy dependence of fluctuations in central Pb+Pb collisions from NA49 at the CERN SPS
• The Equation of State and Quark Number Susceptibility in Hard-Dense-Loop Approximation
• Fluctuations and clustering of multiplicity in collisions of relativistic ions
• Multiplicity Fluctuations and Correlations in Limited Momentum Space Bins in Relativistic Gases
• Statistical Fluctuations and Correlations in Hadronic Equilibrium Systems
• Statistical Ensembles With Finite Bath: A Description for an Event Generator