Strangeness production in small and large collisions systems at RHIC

Details Strangeness production in small and large collisions systems at RHIC Strangeness production in small and large collisions systems at RHIC

2006-04-13

arxiv.org/abs/nucl-ex/0604008v1

Physics

Nuclear Physics

Nuclear Experiment

3 pages, 2 figures, Proceedings for PANIC 2005, Santa Fe (NM)

Scientific paper

10.1063/1.2220217

We present measurements of strange and multi-strange hadrons in p+p collisions at $\sqrt{s}$= 200 GeV measured by STAR. We will compare these preliminary results to leading-order (LO) and next-to-leading order (NLO) perturbative QCD models widely believed to describe the production mechanisms. In particular we will point out recent changes of the model calculations which improve the agreement with our data significantly and will discuss the physics consequences. In larger collision systems, produced with heavy ions at RHIC, we observe the centrality dependence of strange and multi-strange particle production. The non-linear dependency between (anti)-hyperon yields and the system size \Npart seems to indicate that the correlation volume does not scale exactly with \Npart in contradiction to previous assumptions by thermal models.

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