Collective dynamics in heavy and light-ion collisions. I. Kinetic theory vs hydrodynamics

• DOI: 10.1103/physrevd.111.054024
• Publication Date: 2025-03-25T02:24:39Z
• Authors: Victor E. Ambruş; S. Schlichting; C. Werthmann
• Keywords: Kinetic Theory; Dynamics

High-energy nuclear collisions exhibit collective flow, which emerges as a dynamical response of the quark-gluon plasma (QGP) to initial state geometry collision. Collective flow in heavy-ion is usually described within multistage evolution models, employ viscous relativistic hydrodynamic description space-time QGP. By comparing event-by-event simulations kinetic theory and hydrodynamics OO, AuAu PbPb at energies Relativistic Heavy Ion Collider (RHIC) LHC, we quantify what extent macroscopic can accurately describe development small systems, such sensitive nonequilibrium QGP beyond hydrodynamics. Published by American Physical Society 2025