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

الأصل · EN

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/π, p/π, 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 √sNN = 7.7-200 GeV using the observable, ν 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 ν dyn and to simplify comparisons between experimental measurements are also considered. Constructing an intensive quantity allows for a direct connection to thermodynamic predictions.