Connecting far-from-equilibrium hydrodynamics to resummed transport coefficients and attractors

Abstract

We investigate whether hydrodynamic attractors are present in simulations of the quark-gluon plasma formed in heavy-ion collisions. We argue that Lagrangian schemes to solve the relativistic viscous fluid equations can be particularly useful to characterize the properties of attractors in heavy ion collisions. Preliminary results are shown in Israel-Stewart theory to support such a claim. We also discuss how to perform the slow-roll expansion in Israel-Stewart theory undergoing a general flow, which naturally leads to the definition of a resummed shear viscosity coefficient that depends on the gradients of the hydrodynamic fields.

4 pages, 1 figure, contribution to the Quark Matter 2019 proceedings

References in corpus (4)

• Bulk viscosity-driven suppression of shear viscosity effects on the flow harmonics at RHIC
• Studying the validity of relativistic hydrodynamics with a new exact solution of the Boltzmann equation
• Exact hydrodynamic attractor of an ultrarelativistic gas of hard spheres
• How large is the Knudsen number reached in fluid dynamical simulations of ultrarelativistic heavy ion collisions?

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