Initial eccentricity fluctuations and their relation to higher-order flow harmonics

Abstract

Monte Carlo simulations are used to compute the centrality dependence of the participant eccentricities (${\epsilon }_n$) in Au+Au collisions, for the two primary models currently employed for eccentricity estimates -- the Glauber and the factorized Kharzeev-Levin-Nardi (fKLN) models. They suggest specific testable predictions for the magnitude and centrality dependence of the flow coefficients $v_n$, respectively measured relative to the event planes ${\Psi }_n$. They also indicate that the ratios of several of these coefficients may provide an additional constraint for distinguishing between the models. Such a constraint could be important for a more precise determination of the specific viscosity of the matter produced in heavy ion collisions.

6 pages, 6 figures, published version

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