Dependence of elliptic flow on transverse momentum in 200 GeV Au-Au and 2.76 TeV Pb-Pb collisions

TL;DR

This study models how elliptic flow varies with transverse momentum in high-energy nucleus-nucleus collisions, showing good agreement with experimental data and revealing a linear relationship between expansion factor and impact parameter.

Contribution

Introduces a multi-source ideal gas model including source interactions to analyze elliptic flow dependence on transverse momentum in heavy-ion collisions.

Findings

Model agrees with STAR and ALICE data over wide P_T range

Expansion factor increases linearly with impact parameter

Elliptic flow dependence on P_T is effectively captured

Abstract

We investigate the dependence of elliptic flows $v_2$ on transverse momentum $P_T$ for charged hadrons produced in nucleus-nucleus collisions at high energy by using a multi-source ideal gas model which includes the interaction contribution of the emission sources. Our calculated results are approximately in agreement with the experimental data over a wider $P_T$ range from the STAR and ALICE Collaborations. It is found that the expansion factor increases linearly with the impact parameter from most central (0-5%) to mid-peripheral (35-40%) collisions.