Systematic study of elliptic flow parameter in the relativistic nuclear collisions at RHIC and LHC energies

TL;DR

This paper uses a modified cascade model to systematically study the elliptic flow parameter in relativistic nuclear collisions at RHIC and LHC energies, successfully reproducing experimental data and predicting results for other collision systems.

Contribution

The study introduces a new sampling method in the PACIAE 2.1 model to accurately simulate elliptic flow in high-energy nuclear collisions, extending analysis to various collision types and energies.

Findings

Reproduces experimental $v_2$ data for Au+Au/Pb+Pb collisions.

Predicts $v_2$ for p+p and p+Au/p+Pb collisions at high energies.

Abstract

We employed the new issue of a parton and hadron cascade model PACIAE 2.1 to systematically investigate the charged particle elliptic flow parameter $v_2$ in the relativistic nuclear collisions at RHIC and LHC energies. With randomly sampling the transverse momentum $x$ and $y$ components of the particles generated in string fragmentation on the circumference of an ellipse instead of circle originally, the calculated charged particle $v_2(\eta)$ and $v_2(p_T)$ fairly reproduce the corresponding experimental data in the Au+Au/Pb+Pb collisions at $\sqrt{s_{NN}}$=0.2/2.76 TeV. In addition, the charged particle $v_2(\eta)$ and $v_2(p_T)$ in the p+p collisions at $\sqrt s$=7 TeV as well as in the p+Au/p+Pb collisions at $\sqrt{s_{NN}}$=0.2/5.02 TeV are predicted.