Even-by-event hydrodynamical simulations for $\sqrt{s}_{NN}$=200 GeV Au+Au collisions and the correlation between flow coefficients and initial asymmetry measures

TL;DR

This study uses event-by-event ideal hydrodynamics with Monte-Carlo Glauber initial conditions to analyze flow and multiplicity in 200 GeV Au+Au collisions, revealing correlations between initial asymmetry and flow coefficients.

Contribution

It introduces a detailed event-by-event hydrodynamical simulation approach to study flow coefficients and their correlation with initial asymmetries in heavy-ion collisions.

Findings

Monte-Carlo Glauber model reproduces experimental multiplicity and elliptic flow.

Higher flow harmonics $v_3$, $v_4$ overestimate data in peripheral collisions.

Elliptic flow remains strongly correlated with initial eccentricity across all centralities.

Abstract

Centrality dependence of charged particles multiplicity, transverse momentum spectra, integrated and differential elliptic flow, in $\sqrt{s}_{NN}$=200 GeV Au+Au collisions are analyzed using event by event ideal hydrodynamics. 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 particles multiplicity, integrated and differential elliptic flow. Model predictions for higher flow harmonics, $v_3$, $v_4$ 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 exception of the elliptic flow, for all the higher flow coefficients ($v_n$,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.