Particle species dependence of elliptic flow fluctuations in Pb-Pb collisions at LHC energies in a multiphase transport model

TL;DR

This study uses a multiphase transport model to investigate how elliptic flow fluctuations depend on particle species in Pb-Pb collisions at LHC energies, providing insights into QGP hadronization and transport properties.

Contribution

It offers a phenomenological analysis that qualitatively reproduces ALICE measurements and enhances understanding of flow fluctuations and hadronization mechanisms in QGP.

Findings

Qualitative agreement with ALICE data on flow fluctuations

Insights into the role of quark coalescence in hadronization

Enhanced understanding of transport dynamics in QGP

Abstract

The fluctuations of elliptic flow (\vtwo) in relativistic heavy-ion collisions offer a powerful tool to probe the collective behavior and transport properties of the quark-gluon plasma (QGP). The dependence of these fluctuations on particle species further sheds light on the hadronization mechanism. At LHC energies, the ALICE experiment has measured $v_2$ fluctuations for charged pions, kaons, and (anti-)protons via the ratio of \vtwo measured with respect to the spectator plane (\vtwosp) and from the four-particle cumulants (\vtwofour). However, the observed dependencies on transverse momentum and particle type remain not fully understood. In this study, we perform a phenomenological investigation using a multiphase transport (AMPT) model, which allows us to trace the full evolution of flow fluctuations intertwined with the quark coalescence. The results qualitatively reproduce the ALICE measurements and offer deeper insights into the transport dynamics and hadronization of the QGP.