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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
physics and astronomy
Multiplicity fluctuations in relativistic nuclear collisions: Statistical model versus experimental data
Physical Review C - Nuclear Physics, Volume 76, No. 2, Article 024902, Year 2007
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Description
The multiplicity distributions of hadrons produced in central nucleus-nucleus collisions are studied within the hadron-resonance gas model in the large-volume limit. The microscopic correlator method is used to enforce conservation of three charges-baryon number, electric charge, and strangeness-in the canonical ensemble. In addition, in the microcanonical ensemble energy conservation is included. An analytical method is used to account for resonance decays. The multiplicity distributions and the scaled variances for negatively, positively, and all charged hadrons are calculated along the chemical freeze-out line of central Pb+Pb (Au+Au) collisions from GSI Schwerionen Synchrotron to CERN Large Hadron Collider energies. Predictions obtained within different statistical ensembles are compared with the preliminary NA49 experimental results on central Pb+Pb collisions in the SPS energy range. The measured fluctuations are significantly narrower than the Poisson ones and clearly favor expectations for the microcanonical ensemble. Thus this is the first observation of the recently predicted suppression of the multiplicity fluctuations in relativistic gases in the thermodynamical limit owing to conservation laws. © 2007 The American Physical Society.
Authors & Co-Authors
Begun, V. V.
Italy, Rome
Museo Storico Della Fisica e Centro Studi e Ricerche Enrico Fermi
Ukraine, Kyiv
Bogolyubov Institute for Theoretical Physics Nasu
Gaždzicki, Marek
Germany, Frankfurt am Main
Goethe-universität Frankfurt am Main
Poland, Kielce
Jan Kochanowski University, Kielce
Gorenstein, Mark I.
Ukraine, Kyiv
Bogolyubov Institute for Theoretical Physics Nasu
Germany, Frankfurt am Main
Frankfurt Institute for Advanced Studies
Hauer, Michael
Germany, Frankfurt am Main
Goethe-universität Frankfurt am Main
South Africa, Cape Town
University of Cape Town
Konchakovski, V. P.
Ukraine, Kyiv
Bogolyubov Institute for Theoretical Physics Nasu
Germany, Frankfurt am Main
Goethe-universität Frankfurt am Main
Lungwitz, B.
Germany, Frankfurt am Main
Goethe-universität Frankfurt am Main
Statistics
Citations: 6
Authors: 6
Affiliations: 6
Identifiers
Doi:
10.1103/PhysRevC.76.024902
ISSN:
05562813
e-ISSN:
1089490X
Research Areas
Cancer