The VII-th International Conference on the Initial Stages of High-Energy Nuclear Collisions : Initial Stages 2023

System size dependence of pre-equilibrium and applicability of hydrodynamics in heavy-ion collisions

Not scheduled

2h

Københavns Universitetsbibliotek Nord

Poster Collective dynamics from small to large systems Reception and poster session

Speaker

Clemens Werthmann (University of Wroclaw)

Description

We simulate the space-time dynamics of high-energy collisions based on a microscopic kinetic description in the conformal relaxation time approximation, in order to determine the range of applicability of an effective description in relativistic viscous hydrodynamics [1,2]. We find that hydrodynamics provides a quantitatively accurate description of collective flow when the average inverse Reynolds number $\mathrm{Re}^{−1}$ is sufficiently small and the early pre-equilibrium stage is properly accounted for. We further discuss the implications of our findings for the (in)applicability of hydrodynamics in proton-proton, proton-nucleus and light nucleus collisions.

[1] arXiv: 2211.14379 [hep-ph]
[2] arXiv: 2211.14356 [hep-ph]

Presentation materials

IS_2023_Poster_Werthmann.pdf