Strange Particle Production at RHIC

Details Strange Particle Production at RHIC Strange Particle Production at RHIC

2008-09-30

arxiv.org/abs/0810.0017v1

Eur.Phys.J.C62:249-254,2009

Physics

Nuclear Physics

Nuclear Experiment

Conference proceedings for Hot Quarks 2008, 5 pages and 4 figures

Scientific paper

10.1140/epjc/s10052-009-0979-1

We report STAR measurements of mid-rapidity yields for the $\Lambda$, $\bar{\Lambda}$, $K^{0}_{S}$, $\Xi^{-}$, $\bar{\Xi}^{+}$, $\Omega^{-}$, and $\bar{\Omega}^{+}$ particles in Cu+Cu and Au+Au $\sqrt{s_{NN}} = 200$ GeV collisions. We show that at a given number of participating nucleons, bulk strangeness production is higher in Cu+Cu collisions compared to Au+Au collisions at the same center of mass energy, counter to predictions from the Canonical formalism. We compare both the Cu+Cu and Au+Au yields to AMPT and EPOS predictions, and find they reproduce key qualitative aspects of the data. Finally, we investigate other scaling parameters and find bulk strangeness production for both the measured data and theoretical predictions, scales better with the number participants that undergo more than one collision.

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