Effect of various particlization scenarios on anisotropic flow and particle production using UrQMD hybrid model

TL;DR

This study investigates how different particlization scenarios and equations-of-state in the UrQMD hybrid model affect observables like flow coefficients and particle ratios in Au+Au collisions, aiding future experimental comparisons.

Contribution

It systematically analyzes the impact of various particlization models and EoS choices on key observables in heavy-ion collisions within the UrQMD hybrid framework.

Findings

Certain particlization models better reproduce experimental flow data.

The choice of EoS significantly influences particle ratios and rapidity spectra.

Optimal model combinations can improve predictions for upcoming experiments.

Abstract

We discuss the effect of various particlization scenarios available in the hybrid ultrarelativistic quantum molecular dynamics (UrQMD) event generator on different observables in non-central ($b$ $=$ 5--9 $fm$) Au + Au collisions in the beam energy range 1A-158A GeV. Particlization models switch fluid dynamic description to the transport description using various hypersurface criteria. In addition to particlization models, various equations-of-state (EoS) provided by the UrQMD hybrid model were employed. The observables examined in this paper include the excitation function of anisotropic coefficients such as directed ($v_{1}$) and elliptic flow ($v_{2}$), particle ratios of the species, and the shape of net-proton rapidity spectra at mid-rapidity. The results obtained here can help predict and compare the measurements provided by future experiments at the Facility for Antiproton and Ion Research (FAIR) and the Nuclotron-based Ion Collider fAcility (NICA) once the data becomes available. We also study the most suitable combination of the particlization model and EoS, which best describes the experimental measurements.