Centrality dependence of multiplicity, transverse energy, and elliptic flow from hydrodynamics

Abstract The centrality dependence of the charged multiplicity, transverse energy, and elliptic flow coefficient is studied in a hydrodynamic model, using a variety of different initializations which model the initial energy or entropy production process as a hard or soft process, respectively. While the charged multiplicity depends strongly on the chosen initialization, the p T -integrated elliptic flow for charged particles as a function of charged particle multiplicity and the p T -differential elliptic flow for charged particles in minimum bias events turn out to be almost independent of the initial energy density profile.