Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2012-04-24
Physics
Nuclear Physics
Nuclear Theory
15 pages, 9 figures
Scientific paper
A successful simultaneous description of the hadronic yields, pion, kaon and proton spectra, elliptic flows and femtoscopy scales in hydrokinetic model of A+A collisions is presented at different centralities for the top RHIC and LHC energies. The only changed parameter at different collision energies and centralities, except for peripheric events, is normalization to number of all charged particles. The hydrokinetic model is used in its hybrid version that allows one to switch correctly to the UrQMD cascade at the isochronic hypersurface which separates the cascade stage and decaying hydrodynamic one. The results are compared with the standard hybrid model where hydrodynamics and hadronic cascade are matching just at the non-space-like hypersurface of chemical freeze-out. The initial conditions are based on both Glauber- and KLN- Monte-Carlo simulations, the results are compared. It seems that the observables, especially the femtoscopy data, prefer the Glauber initial conditions. The modification of the particle number ratios caused, in particular, by the particle annihilations at the afterburn stage is analyzed.
Werner Kirstin
~Karpenko Iu. A.
~Sinyukov Yu. M.
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