Probing momentum dependence of hydrodynamization in heavy-ion collisions

TL;DR

This paper investigates how non-thermal momentum distributions affect the hydrodynamization process in heavy-ion collisions, using extended hydrodynamic models and numerical simulations to compare with experimental data.

Contribution

It introduces an extended relativistic hydrodynamic framework that accounts for non-thermal momentum distributions during the evolution of heavy-ion collision systems.

Findings

Non-thermal momentum distributions influence hydrodynamization timescales.

Modified models better reproduce experimental photon and hadron spectra.

Momentum dependence of hydrodynamization is characterized.

Abstract

The fluidity of the hot and dense QCD matter is a key characteristic of the medium created in high-energy heavy-ion collisions. We extend the framework of the relativistic hydrodynamic model to incorporate non-thermal momentum distributions that may emerge during the dynamical evolution of the collision system. Numerical simulations are performed to elucidate the phenomenological implications of these modifications on charged hadrons and direct photons measured in collider experiments.