Physics – Nuclear Physics – Nuclear Experiment
Scientific paper
2004-11-18
Nucl.Phys. A749 (2005) 299-303
Physics
Nuclear Physics
Nuclear Experiment
5 pages, 4 figures. Talk presented in Phase transitions in strongly interacting matter Prague, 23.8.-29.8. 2004 18th Nuclear P
Scientific paper
The study of the multi-strange production in the final state of ultra-relativistic Au+Au collisions at top RHIC energy gives information on the freeze-out conditions and probably on earlier stages of the collision. The chemical freeze-out temperature as well as the strangeness phase space occupancy factor gamma_s extracted from statistical models are studied as a function of the collision centrality. Within the framework of a hydrodynamically-inspired model the transverse collectivity of the collision is investigated. In this view, multi-strange particles seem to develop significant radial transverse flow. Furthermore, they present an elliptic flow as stronger as previously measured baryons supporting the idea that a fraction of the final collective motion has been developed at an early partonic stage of the collision.
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