Abstract
We study the relation between elliptic flow, , and the initial eccentricity, , in heavy-ion collisions, using hydrodynamic simulations. Significant deviations from linear eccentricity scaling are seen in more peripheral collisions. We identify the mechanism responsible for these deviations as a cubic response, which we argue is a generic property of the hydrodynamic response to the initial density profile. The cubic response increases elliptic flow fluctuations, thereby improving agreement of initial condition models with experimental data.
- Received 13 November 2015
- Revised 8 January 2016
DOI:https://doi.org/10.1103/PhysRevC.93.014909
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