Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2010-04-09
Phys.Rev.C82:024903,2010
Physics
Nuclear Physics
Nuclear Theory
replaced with the version published in Phys.Rev.C 82
Scientific paper
10.1103/PhysRevC.82.024903
We address the problem if the early thermalization and HBT puzzles in relativistic heavy-ion collisions may be solved by the assumption that the early dynamics of the produced matter is locally anisotropic. The hybrid model describing the purely transverse hydrodynamic evolution followed by the perfect-fluid hydrodynamic stage is constructed. The transition from the transverse to perfect-fluid hydrodynamics is described by the Landau matching conditions applied at a fixed proper time. The global fit to the RHIC data reproduces the soft hadronic observables (the pion, kaon, and the proton spectra, the pion and kaon elliptic flow, and the pion HBT radii) with the accuracy of about 20%. These results indicate that the assumption of the very fast thermalization may be relaxed. In addition, the presented model suggests that a large part of the inconsistencies between the theoretical and experimental HBT results may be removed.
Florkowski Wojciech
Ryblewski Radoslaw
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