Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2001-11-07
Nucl.Phys.A702:269-280,2002
Physics
High Energy Physics
High Energy Physics - Phenomenology
12 pages, including 6 figures. Invited talk at the International Conference on "Statistical QCD", Bielefeld, August 26-30, 200
Scientific paper
10.1016/S0375-9474(02)00714-5
It is shown that recent RHIC data on hadron spectra and elliptic flow can be excellently reproduced within a hydrodynamic description of the collision dynamics, and that this provides strong evidence for rapid thermalization while the system is still in the quark-gluon plasma phase. But even though the hydrodynamic approach provides an impressive description of the single-particle momentum distributions, it fails to describe the two-particle momentum correlation (HBT) data for central Au+Au collisions at RHIC. We suggest that this is not likely to be repaired by further improvements in our understanding of the early collision stages, but probably requires a better modelling of the freeze-out process. We close with a prediction of the phases of the azimuthal oscillations of the HBT radii in noncentral collisions at RHIC.
Heinz Ulrich W.
Kolb Peter F.
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