Hadron freeze-out conditions in high energy nuclear collisions
Nu Xu, Masashi Kaneta
Abstract
Systematic trend of the hadron freeze-out conditions from AGS/SPS to RHIC is discussed. The most interesting results from collisions at RHIC are that the system is indeed approaching net-baryon free and the transverse expansion is much stronger than that from collisions at AGS/SPS energies. In order to understand the trend of the collective velocity, an energy scan between sNN = 20 - 200 GeV, is important. In addition, systematic studies on the anisotropy parameter v2 and the transverse momentum distributions of ϕ, Ω, and J / ψ$ are necessary as they will help in determining whether the collectivity is developed at the partonic stage.
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