Investigation of the elliptic flow fluctuations of the identified particles using the A Multi-Phase Transport model

TL;DR

This study uses the AMPT model to analyze elliptic flow fluctuations of identified particles, comparing participant and spectator event planes, revealing weak dependence on particle species and transverse momentum.

Contribution

It demonstrates that the first order spectator event plane can effectively study elliptic flow fluctuations within the AMPT model, providing insights into their sources.

Findings

Elliptic flow fluctuations show weak particle species dependence.

Flow fluctuations depend weakly on transverse momentum.

Spectator event plane effectively captures flow fluctuations.

Abstract

A Multi-Phase Transport (AMPT) model is used to study the elliptic flow fluctuations of identified particles using participant and spectator event planes. The elliptic flow measured using the first order spectator event plane is expected to give the elliptic flow relative to the true reaction plane which suppresses the flow fluctuations. However, the elliptic flow measured using the second-order participant plane is expected to capture the elliptic flow fluctuations. Our study shows that the first order spectator event plane could be used to study the elliptic flow fluctuations of the identified particles in the AMPT model. The elliptic flow fluctuations magnitude shows weak particle species dependence and transverse momentum dependence. Such observation will have important implications for understanding the source of the elliptic flow fluctuations.