Abstract
The effects of event-by-event fluctuations in the initial geometry of colliding nuclei are important in the analysis of final flow observables in relativistic heavy-ion collisions. We use hydrodynamic simulations to study the amplitude correlations between different orders of event-by-event fluctuating anisotropic flow harmonics. While the general trends seen in the experimental data are qualitatively reproduced by the model, deviations in detail, in particular for peripheral collisions, point to the need for more elaborate future calculations with a hybrid approach that describes the late hadronic stage of the evolution microscopically. It is demonstrated explicitly that the observed anticorrelation between and is the consequence of approximately linear hydrodynamic response to a similar anticorrelation of the corresponding initial eccentricities and . For , the hydrodynamic correlations between and deviate from the rescaled correlations among the corresponding initial eccentricities, demonstrating a nonlinear mode coupling effect in higher-order flows.
1 More- Received 11 July 2016
DOI:https://doi.org/10.1103/PhysRevC.94.024910
©2016 American Physical Society