Strange Particle Production at RHIC

Abstract

We report STAR measurements of mid-rapidity yields for the $\Lambda$, $\bar{\Lambda }$, $K_S^0$, ${\Xi }^{-}$, ${\bar{\Xi }}^{+}$, ${\Omega }^{-}$, 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.

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

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Cited by in corpus (3)

• Strangeness Enhancement in Cu+Cu and Au+Au Collisions at \sqrt{s_{NN}} = 200 GeV
• System-size dependence of Lambda and Xi production in nucleus--nucleus collisions at 40A and 158A GeV measured at the CERN Super Proton Synchrotron
• Strangeness Production in Heavy-Ion Collisions at STAR