K/, K/p and p/ ratio fluctuations within the HSD transport approach

V P Konchakovski (1, 2) , M Hauer (1) , M I Gorenstein (2) , E L Bratkovskaya (3)

1 H-QM - Helmholtz Research School - Quark Matter Studies
2 Bogolyubov Institute for Theoretical Physics
3 Institute for Theoretical Physics

Particle number fluctuations and correlations in nucleus-nucleus collisions at SPS and RHIC energies have been studied within the Hadron-String-Dynamics (HSD) transport approach. Event-by-event fluctuations of kaon-to-pion, proton-topion and kaon-to-proton number ratios are calculated for the samples of most central collision events and compared with the available experimental data. It has been found that the HSD model can qualitatively reproduce the measured excitation function for the K/π ratio fluctuations in central Au+Au (or Pb+Pb) collisions from low SPS up to the top RHIC energy. Predictions for the K/p and p/π ratios impose a challenge for future experiments.

Mots clés: Physical Sciences

V P Konchakovski, M Hauer, M I Gorenstein, E L Bratkovskaya. K/, K/p and p/ ratio fluctuations within the HSD transport approach. Journal of Physics G: Nuclear and Particle Physics, 2010, 37 (9), pp.94045. ⟨10.1088/0954-3899/37/9/094045⟩. ⟨hal-00600852⟩