Charge Dependence and Scaling Properties of Dynamical $K/π$, $p/π$, and $K/p$ Fluctuations from the STAR Experiment

Details Charge Dependence and Scaling Properties of Dynamical $K/π$, $p/π$, and $K/p$ Fluctuations from the STAR Experiment Charge Dependence and Scaling Properties of Dynamical $K/π$, $p/π$, and $K/p$ Fluctuations from the STAR Experiment

2012-01-16

arxiv.org/abs/1201.3336v1

Physics

Nuclear Physics

Nuclear Experiment

6 pages, 3 figures, Proceedings of the International Conference on Strangeness in Quark Matter 2011 (SQM2011), Krakow, Poland,

Scientific paper

Dynamical fluctuations in global conserved quantities such as baryon number, strangeness, or charge may be enhanced near a QCD critical point. Charge dependent results from new measurements of dynamical $K/\pi$, $p/\pi$, and $K/p$ ratio fluctuations are presented. The STAR experiment has performed a comprehensive study of the energy dependence of these dynamical fluctuations in Au+Au collisions at the energies $\sqrt{s_{NN}}$ = 7.7-200 GeV using the observable, $\nu_{\rm dyn}$. These results are compared to previous measurements and to theoretical predictions. Various proposed scaling scenarios that attempt to remove the intrinsic volume dependence of $\nu_{\rm dyn}$ and to simplify comparisons between experimental measurements are also considered. Constructing an intensive quantity allows for a direct connection to thermodynamic predictions.

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