STAR's Measurement of Energy and System Size Dependence of K/$\pi$ Fluctuations at RHIC

Abstract

Strangeness enhancement has been predicted to be one of the signatures of the formation of the quark gluon plasma (QGP) and event-by-event fluctuations of strangeness may reveal the nature of such a phase transition. We report results for $K/\pi$ fluctuations from Cu+Cu at $\sqrt{s_{NN}}$ = 62.4 and 200 GeV and Au+Au collisions at $\sqrt{s_{NN}}$ = 62.4, 130 and 200 GeV using the STAR detector at the Relativistic Heavy Ion Collider. We compare our results with the results observed in central Pb+Pb collisions at SPS energies at $\sqrt{s_{NN}}$ = 6.3, 7.6, 8.8, 12.3, and 17.3 GeV. We observe the fluctuation strength measured at the highest SPS energy point by the NA49 collaboration in Pb+Pb collisions is similar to our results in Cu+Cu and Au+Au collisions. We also compare our results with HIJING, a statistical hadronization model and a multi-phase transport model.

To be published in the proceedings of Quark Matter, 2008, held at Jaipur, India

References in corpus (4)

• The STAR Time Projection Chamber: A Unique Tool for Studying High Multiplicity Events at RHIC
• A Multi-Phase Transport model for nuclear collisions at RHIC
• Multiplicity fluctuations in Au+Au collisions at $\sqrt{s_{NN}}=130$ GeV
• Rapidity and species dependence of particle production at large transverse momentum for $d$+Au collisions at \sqrt s_NN = 200 GeV

Cited by in corpus (1)

• Fluctuations of the $K/\pi$ Ratio in Nucleus-Nucleus Collisions: Statistical and Transport Models