LAUSR

The moments and moment products of conserved charges are believed to be sensitive to the critical fluctuations, which have been used to search for the QCD critical point. Using a dynamical multiphase transport model, we reproduce the centrality and energy dependences of moments and moment products of net-charge multiplicity distributions in Au+Au collisions measured by the Beam Energy Scan program at RHIC. No non-monotonic energy dependence is observed. We find that the moment products develop during the dynamical evolution of heavy-ion collisions. The observed difference from the expectation of Poisson baseline indicates a positive two-particle correlation between positively and negatively charged particles, which could arise from different dynamical processes at different stages. Therefore, it is essential to take the dynamical evolution into account in order to use moments and moment products of net-charge multiplicity distributions to search for the QCD critical point in relativistic heavy-ion collisions.