Initial conditions for hydrodynamics from kinetic theory equilibration

Abstract

We use effective kinetic theory to study the pre-equilibrium dynamics in heavy-ion collisions. We describe the evolution of linearized energy perturbations on top of out-of-equilibrium background to the energy-momentum tensor at a time when hydrodynamics becomes applicable. We apply this description to IP-Glasma initial conditions and find an overall smooth transition to hydrodynamics. In a phenomenologically favorable range of $\eta /s$ values, early time dynamics can be accurately described in terms of a few functions of a scaled time variable $\tau T/(\eta /s)$. Our framework can be readily applied to other initial state models to provide the pre-equilibrium dynamics of the energy momentum tensor.

arXiv comment5 pages, 5 figures, Proceedings for the 26th International Conference on Ultrarelativistic Nucleus-Nucleus Collisions (Quark Matter 2017), February 5-11 2017, Chicago, Illinois, USA

References in corpus (12)

• Collective flow and viscosity in relativistic heavy-ion collisions
• The Color Glass Condensate
• Fluctuating Glasma initial conditions and flow in heavy ion collisions
• Bottom-up thermalization in heavy ion collisions
• Event-by-event gluon multiplicity, energy density and eccentricities at RHIC and LHC
• Isotropization and hydrodynamization in weakly coupled heavy-ion collisions
• Turbulent thermalization process in heavy-ion collisions at ultrarelativistic energies
• Universal attractor in a highly occupied non-Abelian plasma
• Initial State Fluctuations and Final State Correlations in Relativistic Heavy-Ion Collisions
• A fully dynamical simulation of central nuclear collisions
• Initial conditions for hydrodynamics from weakly coupled pre-equilibrium evolution
• Initial state of Heavy-Ion Collisions: Isotropization and thermalization

Cited by in corpus (4)

• Linearly polarized gluons and axial charge fluctuations in the Glasma
• Nonequilibrium quark production in the expanding QCD plasma
• Effects of initial-state dynamics on collective flow within a coupled transport and viscous hydrodynamic approach
• Nonequilibrium quark production in the expanding QCD plasma