Excitation Function of Net Charge Fluctuations at RHIC

Abstract

We present measurements of dynamical net charge fluctuations in Au+Au collisions at √{sNN} = 0, 130 and 200 GeV using the measure ν+-, dyn. The dynamical fluctuations are finite and exhibit a rather modest dependence on beam energy. We also find they violate the trivial 1/N scaling expected for nuclear collisions consisting of independent nucleon–nucleon interactions. We speculate this may be due to a combination of thermalization and radial flow effects.