Investigations of the linear and non-linear flow harmonics using the A Multi-Phase Transport model

TL;DR

This study uses the AMPT model to analyze how parton-scattering cross-sections and hadronic re-scattering influence flow harmonics and correlations in Au+Au collisions, providing insights into the sensitivity of higher-order flow harmonics.

Contribution

It demonstrates the sensitivity of higher-order flow harmonics to parton-scattering cross-sections and shows that certain flow correlations are independent of these parameters.

Findings

Higher-order flow harmonics depend on $\sigma_{pp}$ variations.

Non-linear response coefficients are $\sigma_{pp}$ independent.

Flow correlations between different symmetry planes are unaffected by $\sigma_{pp}$.

Abstract

The Multi-Phase Transport model (AMPT) is used to study the effects of the parton-scattering cross-sections ($\sigma_{pp}$) and hadronic re-scattering on the linear contributions to the flow harmonic $\textit{v}_{4}$, the non-linear response coefficients, and the correlations between different order flow symmetry planes in Au+Au collisions at 200~GeV. The model results, which agree with current experimental measurements, indicate that the higher-order flow harmonics are sensitive to the $\sigma_{pp}$ variations. However, the non-linear response coefficients and the correlations between different order flow symmetry planes are $\sigma_{pp}$ independent. These results suggest that further detailed experimental measurements which span a broad range of collision systems and beam energies could serve as an additional constraint for the theoretical models' calculations.