QGP time formation in holographic shock waves model of heavy ion collisions

TL;DR

This paper estimates the thermalization time in holographic heavy-ion collision models using colliding shock waves, showing how confinement and anisotropy influence the thermalization process.

Contribution

It introduces two bottom-up AdS/QCD models to study thermalization times, incorporating confinement and anisotropy effects in holographic heavy-ion collisions.

Findings

Confinement reduces thermalization time.

Anisotropy accelerates thermalization.

Models align with RHIC and LHC multiplicity data.

Abstract

We estimate the thermalization time in two colliding shock waves holographic model of heavy-ion collisions. For this purpose we model the process by the Vaidya metric with a horizon defined by the trapped surface location. We consider two bottom-up AdS/QCD models that give, within the colliding shock waves approach, the dependence of multiplicity on the energy compatible with RHIC and LHC results. One model is a bottom-up AdS/QCD confining model and the other is related to an anisotropic thermalization. We estimate the thermalization time and show that increasing the confining potential decreases the thermalization time as well as an anisotropy accelerates the thermalization.