Measuring Dynamical K/$\pi$ and p/$\pi$ Fluctuations in Au+Au Collisions from the STAR Experiment

Abstract

Results from new measurements of dynamical $K/\pi$ and $p/\pi$ ratio fluctuations are presented. Dynamical fluctuations in global conserved quantities such as baryon number, strangeness, or charge may be observed near a QCD critical point. The STAR experiment has previously acquired data in Au+Au collisions at the energies $\sqrt{s_{NN}}$ = 200, 130, 62.4, and 19.6 GeV and Cu+Cu collisions at $\sqrt{s_{NN}}$ = 200, 62.4, and 22.4 GeV. The commencing of a QCD critical point search at RHIC has extended the reach of possible measurements of dynamical $K/\pi$ and $p/\pi$ ratio fluctuations from Au+Au collisions to lower energies. New results are compared to previous measurements and to theoretical predictions from the UrQMD model.

10 pages, 5 figures, To be published in the proceedings of CPOD 2010, Dubna, Russia, August 2010, Yadernaya Fizika (Physics of Atomic Nuclei)

References in corpus (2)

• Higher Moments of Net-proton Multiplicity Distributions at RHIC
• K/pi Fluctuations at Relativistic Energies

Cited by in corpus (3)

• Results from the STAR Beam Energy Scan Program
• Search for QCD Phase Transitions and the Critical Point utilizing Particle Ratio Fluctuations and Transverse Momentum Correlations from the STAR Experiment
• Energy and system size dependence of strongly intensive fluctuation measures in heavy-ion collisions at FAIR energies