Particle Number Fluctuations and Correlations in Nucleus-Nucleus Collisions
V.P.Konchakovski (H-QM, Uni. Frankfurt & BITP, Kiev), M.Hauer (H-QM,, Uni.Frankfurt), M.I.Gorenstein (FIAS, Frankfurt & BITP, Kiev),, E.L.Bratkovskaya (ITP, Uni.Frankfurt)
TL;DR
This paper investigates particle number fluctuations and correlations in nucleus-nucleus collisions using statistical models and transport simulations, comparing results with experimental data to understand underlying physics.
Contribution
It combines statistical hadron-resonance gas models and the Hadron-String-Dynamics approach to analyze fluctuations and correlations across different ensembles and experimental conditions.
Findings
Event-by-event fluctuation analysis matches experimental data.
Acceptance and centrality effects significantly influence fluctuation measurements.
Transport model results provide insights into collision dynamics.
Abstract
Particle number fluctuations and correlations in nucleus-nucleus collisions at SPS and RHIC energies are studied within the statistical hadron-resonance gas model in different statistical ensembles and in the Hadron-String-Dynamics (HSD) transport approach. Event-by-event fluctuations of the proton to pion and kaon to proton number ratios are calculated in the HSD model for the samples of most central collision events and compared with the available experimental data. The role of the experimental acceptance and centrality selection is discussed.
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