Finite size effects and scaling properties of charge fluctuations

An effective model is introduced to illustrate finite volume effects beyond the usual momentum space constraints. The fluctuations of the chiral order parameter and the net baryon number, as well as their scaling properties, are investigated near a critical point and a first-order transition in finite size systems. The finite volume effects on the kurtosis are shown in detail along the approximate freeze-out line. Several implications of the finite volume in the charge fluctuations are discussed.