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arXiv · 1807.06104

Fluid dynamics of out of equilibrium boost invariant plasmas

Jean-Paul Blaizot·Li Yan
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Abstract

We establish a set of equations for moments of the distribution function. In the relaxation time approximations, these moments obey a coupled set of equations that can be truncated order-by-order. Solving the equations of moments, we are able to identify an attractor solution that controls a transition from a free streaming fixed point to a hydrodynamic fixed point. In particular, this attractor solution provides a renormalization of the effective value of the shear viscosity to entropy density ratio, $η/s$, taking into account off-equilibrium effects.

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Jean-Paul Blaizot, Li Yan. 2018-07-16. Fluid dynamics of out of equilibrium boost invariant plasmas. https://doi.org/10.1016/j.nuclphysa.2018.10.040

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