Collective dynamics in heavy and light-ion collisions -- I) Kinetic Theory vs. Hydrodynamics

Abstract

High-energy nuclear collisions exhibit collective flow, which emerges as a dynamical response of the Quark-Gluon Plasma (QGP) to the initial state geometry of the collision. Collective flow in heavy-ion collisions is usually described within multi-stage evolution models, which employ a viscous relativistic hydrodynamic description of the space-time evolution of the QGP. By comparing event-by-event simulations in kinetic theory and viscous hydrodynamics in OO, AuAu and PbPb collisions at RHIC and LHC energies, we quantify to what extent a macroscopic hydrodynamic description can accurately describe the development of collective flow and to what extent collective flow in small systems, such as OO, is sensitive to the non-equilibrium evolution of the QGP beyond hydrodynamics.

24 pages, 16 figures. v2: several minor changes, added data in ancillary folder, v3: several minor changes, data files moved to cited zenodo archive, equivalent to published version

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• Collective dynamics in heavy and light-ion collisions -- I) Kinetic Theory vs. Hydrodynamics

Cited by in corpus (6)

• Collective dynamics in heavy and light-ion collisions -- I) Kinetic Theory vs. Hydrodynamics
• Collective dynamics in heavy and light-ion collisions -- II) Determining the origin of collective behavior in high-energy collisions
• Bayesian reconstruction of anisotropic flow fluctuations at fixed impact parameter
• Solving the QCD effective kinetic theory with neural networks
• Phenomenological constraints on QCD transport with quantified theory uncertainties
• Extended applicability domain of viscous anisotropic hydrodynamics in (2+1)-D Bjorken flow with transverse expansion