Nuclear Theory
[Submitted on 8 Feb 2016 (v1), last revised 30 Mar 2016 (this version, v2)]
Title:Mode-coupling effects in anisotropic flow in heavy-ion collisions
View PDFAbstract:Higher-order anisotropic flows in heavy-ion collisions are affected by nonlinear mode coupling effects. It has been suggested that the associated nonlinear hydrodynamic response coefficients probe the transport properties and are largely insensitive to the spectrum of initial density fluctuations of the medium created in these collisions. To test this suggestion, we explore nonlinear mode coupling effects in event-by-event viscous fluid dynamics, using two different models for the fluctuating initial density profiles, and compare the nonlinear coupling coefficients between the initial eccentricity vectors before hydrodynamic expansion and the final flow vectors after the expansion. For several mode coupling coefficients we find significant sensitivity to the initial fluctuation spectrum. They all exhibit strong sensitivity to the specific shear viscosity at freeze-out, but only weak dependence on the shear viscosity during hydrodynamic evolution.
Submission history
From: Ulrich Heinz [view email][v1] Mon, 8 Feb 2016 22:55:10 UTC (242 KB)
[v2] Wed, 30 Mar 2016 12:56:06 UTC (277 KB)
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