2007/09/05 by M. Hauer, Viktor Begun, V. V. Begun +5
Mathematics · Physics and Astronomy · #Econometrics #Geometry #High-Energy Particle Collisions Research #Mathematics #Multiplicity (mathematics) #Neutron #Nuclear data #Nuclear physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #Statistical model #Statistical physics #Statistics #nucl-th
paper · pdf · doi:10.1088/0954-3899/35/4/044064
published as J.Phys.G35:044064,2008 · 6 pages, 3 figures
arxiv created 2007/09/05 · openalex publication_date 2008/03/18 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Multiplicity distributions of hadrons produced in central nucleus-nucleus collisions are studied within the hadron-resonance gas model in the large volume limit. In the canonical ensemble conservation of three charges (baryon number, electric charge, and strangeness) is enforced. In addition, in the micro-canonical ensemble energy conservation is included. An analytical method is used to account for resonance decays. Multiplicity distributions and scaled variances for negatively charged hadrons are presented along the chemical freeze-out line of central Pb+Pb (Au+Au) collisions from SIS to LHC energies. Predictions obtained within different statistical ensembles are compared with preliminary NA49 experimental results on central Pb+Pb collisions in the SPS energy range. The measured fluctuations are significantly narrower than a Poisson reference distribution, and clearly favor expectations for the micro-canonical ensemble.