Event-by-event hydrodynamical simulations for √sNN = 200 GeV Au + Au collisions and the correlation between flow coefficients and initial asymmetry measures

Abstract

Centrality dependence of charged particles multiplicity, transverse momentum spectra, and integrated and differential elliptic flow in √sNN = 200 GeV Au + Au collisions are analyzed using event-by-event ideal hydrodynamics. The Monte Carlo Glauber model of initial condition, constrained to reproduce experimental charged particle’s multiplicity in 0%–10% Au + Au collisions, reasonably well reproduces all the experimental observables, e.g., centrality dependence of charged particle multiplicity, and integrated and differential elliptic flow. Model predictions for higher flow harmonics, v3, v4, however, overestimate the experimental data, more in the peripheral collisions than in the central collisions. Correlation between initial (spatial) asymmetry measures and flow coefficients are also studied. With the exception of the elliptic flow, for all the higher flow coefficients (vn,n = 3–5), correlation is reduced with collision centrality. In peripheral collisions, higher flow coefficients are only weakly correlated to the asymmetry measures. Elliptic flow, however, remains strongly correlated with initial eccentricity in all the collision centralities.