Collision energy dependence of elliptic flow splitting between particles and their antiparticles from an extended multiphase transport model

TL;DR

This study uses an extended multiphase transport model to analyze how elliptic flow splitting between particles and antiparticles varies with collision energy, highlighting the model's successes and limitations at different energies.

Contribution

The paper introduces an extended transport model incorporating mean-field potentials, coalescence, and charge conservation to study elliptic flow splitting across energies.

Findings

Model reproduces experimental data at low energies

Qualitative agreement at high energies

Other mechanisms may influence flow splitting

Abstract

Based on an extended multiphase transport model, which includes mean-field potentials in both the partonic and hadronic phases, uses the mix-event coalescence, and respects charge conservation during the hadronic evolution, we have studied the collision energy dependence of the elliptic flow splitting between particles and their antiparticles. This extended transport model reproduces reasonably well the experimental data at lower collision energies but only describes qualitatively the elliptic flow splitting at higher beam energies. The present study thus indicates the existence of other mechanisms for the elliptic flow splitting besides the mean-field potentials and the need of further improvements of the multiphase transport model.