Fluctuations of the K/{pi} ratio in nucleus-nucleus collisions: Statistical and transport models

Journal Article · Sun Feb 15 00:00:00 EST 2009 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.79.024907· OSTI ID:21199574

Gorenstein, M I ^[1]; Hauer, M ^[2]; Konchakovski, V P ^[3]; Bratkovskaya, E L ^[1]

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1. Frankfurt Institute for Advanced Studies, Frankfurt (Germany)
2. Helmholtz Research School, University of Frankfurt, Frankfurt (Germany)
3. Bogolyubov Institute for Theoretical Physics, Kiev (Ukraine)

Event-by-event fluctuations of the kaon to pion number ratio in nucleus-nucleus collisions are studied within the statistical hadron-resonance gas model (SM) for different statistical ensembles and in the hadron-string-dynamics (HSD) transport approach. We find that the HSD model can qualitatively reproduce the measured excitation function for the K/{pi} ratio fluctuations in central Au+Au (or Pb+Pb) collisions from low Super Proton Synchrotron up to top Relativistic Heavy Ion Collider energies. Substantial differences in the HSD and SM results are found for the fluctuations and correlations of the kaon and pion numbers. These predictions impose a challenge for future experiments.

• OSTI ID: 21199574
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 79, Issue 2; Other Information: DOI: 10.1103/PhysRevC.79.024907; (c) 2009 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ATOM-ATOM COLLISIONS
BROOKHAVEN RHIC
COLLISIONS
CORRELATIONS
EXCITATION FUNCTIONS
FLUCTUATIONS
FORECASTING
GOLD
HADRONS
KAONS
LEAD
NUCLEI
PIONS
PROTONS
RESONANCE
SIMULATION
STATISTICAL MODELS
SYNCHROTRONS
TRANSPORT THEORY