Bulk observables in the LHC 5.02 TeV Pb+Pb collisions within the integrated HydroKinetic Model

TL;DR

This paper uses the integrated hydrokinetic model to describe and predict bulk observables in Pb+Pb collisions at 5.02 TeV at the LHC, analyzing parameter sensitivities and model robustness.

Contribution

It demonstrates that key bulk observables are robust against variations in model parameters when initial conditions are properly adjusted.

Findings

Results are insensitive to changes in relaxation time and thermalization rate.

Switching equations of state does not significantly alter predictions with proper initial adjustments.

The model reliably predicts bulk observables across different parameter choices.

Abstract

The paper is devoted to the description and prediction of various bulk observables in the Pb+Pb collisions at the LHC energy $\sqrt{s_{NN}}=5.02$ TeV within the integrated hydrokinetic model (iHKM). Sensitivity of the results to the choice of the appropriate model parameter values is also investigated. It is found that changing of the relaxation time and the rate of thermalization, which characterize the pre-thermal stage of the matter evolution, as well as switching to another equation of state at the hydrodynamic stage and the corresponding hadronization temperature, does not destroy the results, if simultaneously one provides an appropriate adjusting of the initial time for the superdense matter formation and related maximal initial energy density.