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arXiv · 2411.19708

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

Victor E. Ambrus·Sören Schlichting·Clemens Werthmann
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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.

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Victor E. Ambrus, Sören Schlichting, Clemens Werthmann. 2024-11-29. Collective dynamics in heavy and light-ion collisions -- I) Kinetic Theory vs. Hydrodynamics. https://doi.org/10.1103/physrevd.111.054024

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