Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2009-11-23
Nonlinear Phenomena in Complex Systems, vol. 12, no. 4 (2009), pp. 496 - 502
Physics
Nuclear Physics
Nuclear Theory
10 pages, 2 figures; talks given at XXXIX International Symposium on Multiparticle Dynamics, Gomel, Belarus September 4-9, 200
Scientific paper
The results related to non-equilibrium phenomena at the very early and late stages of the processes of A+A collisions are presented. A good description of the hadron momentum spectra as well as pion and kaon interferometry data at RHIC is reached within the realistic dynamical picture of A+A collisions: HydroKinetic Model (HKM). The model accumulates the following features: not too early thermalization time; $\tau\geq 1$ fm/c; a developing of the pre-thermal transverse flows; the effectively more hard, than in the case of chemical equilibrium, equation of state of expanding chemically non-equilibrated multi-hadronic gas; a continuous non-equilibrated emission of hadrons. All these factors lead to a good description of the mentioned RHIC data, in particular, the observed $R_{out}/R_{side}$ ratios, solving, therefore, the HBT puzzle in detailed realistic model.
~Karpenko Iu. A.
~Sinyukov Yu. M.
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