Onset of hydrodynamics for a quark-gluon plasma from the evolution of moments of distribution functions - Archive ouverte HAL Access content directly
Preprints, Working Papers, ... Year :

Onset of hydrodynamics for a quark-gluon plasma from the evolution of moments of distribution functions

(1) , (1)
1

Abstract

The pre-equilibrium evolution of a quark-gluon plasma produced in a heavy-ion collision is studied in the framework of kinetic theory. We discuss the approach to local thermal equilibrium, and the onset of hydrodynamics, in terms of a particular set of moments of the distribution function. These moments quantify the momentum anisotropies to a finer degree than the commonly used ratio of longitudinal to transverse pressures. They are found to be in direct correspondence with viscous corrections of hydrodynamics, and provide therefore an alternative measure of these corrections in terms of the distortion of the momentum distribution. As an application, we study the evolution of these moments by solving the Boltzmann equation for a boost invariant expanding system, first analytically in the relaxation time approximation, and then numerically for a quark-gluon plasma within the small angle approximation to the collision kernel.
Fichier principal
Vignette du fichier
1703.10694v1.pdf (604.63 Ko) Télécharger le fichier
Origin : Files produced by the author(s)
Loading...

Dates and versions

cea-01504854 , version 2 (10-04-2017)
cea-01504854 , version 1 (20-12-2017)

Identifiers

Cite

Jean-Paul Blaizot, Li Yan. Onset of hydrodynamics for a quark-gluon plasma from the evolution of moments of distribution functions. 2017. ⟨cea-01504854v2⟩
96 View
444 Download

Altmetric

Share

Gmail Facebook Twitter LinkedIn More