Systematic study of symmetric cumulants at s_(NN)~(1/2) = 200 GeV in Au+Au collisions using a transport approach

摘要

Measurement of four-particle symmetric cumulants has been considered to be a good tool to study the correlations between amplitudes of different orders of anisotropic flow harmonics in heavy-ion collisions. These new observables have not yet been measured at the Relativistic Heavy Ion Collider. Using a multiphase transport (AMPT) model, a set of predictions for the centrality dependence of the normalized four-particle symmetric cumulants in Au+Au collisions at s_(NN)~(1/2)= 200 GeV is given. In addition, the effects of shear viscosity and hadronic rescattering on the magnitude of symmetric cumulants are discussed using the AMPT model at s_(NN)~(1/2)=200 GeV. It is shown that sc(2,3) is found to be more sensitive to hadronic rescattering, whereas sc(2,4) is more sensitive to the shear viscosity. Rapidity dependence of symmetric cumulants is also shown. A relation between symmetric cumulant and event-plane correlation is investigated using the AMPT model.