Impact of Partonic and Hadronic Transport Processes on Elliptic Flow in the AMPT Model

The AMPT model is used to study elliptic flow \(v_{2}\) in Au\(+\)Au collisions at \(\sqrt {s_{NN}}=200\) GeV, focusing on partonic and hadronic transport processes. By varying the partonic elastic scattering cross section \(\sigma _{p}\) and scaling hadronic cross sections \(\sigma _{H}\), we find that \(v_{2}\) is dominated by partonic interactions with larger \(\sigma _{p}\) accelerating momentum-space anisotropy conversion and suppressing residual spatial anisotropy. Hadronic rescattering minimally impacts \(v_{2}\), only emerging at reduced \(\sigma _{p}\) and higher centrality. The results highlight the critical role of partonic transport in collective flow and the limited influence of hadronic dynamics on final observables. Abstract Published by the Jagiellonian University 2025 authors