Rotating quark-gluon plasma in relativistic heavy ion collisions

TL;DR

This paper investigates the rotational behavior of quark-gluon plasma in heavy ion collisions, analyzing angular momentum and vorticity evolution using the AMPT model across different energies and collision centralities.

Contribution

It provides detailed simulations of the vorticity fields and angular momentum in quark-gluon plasma, highlighting their dependence on collision parameters.

Findings

Global angular momentum increases with collision energy.

Vorticity fields show complex spatial and temporal evolution.

Dependence of vorticity on collision centrality is characterized.

Abstract

We study the rotational collective motion of the quark-gluon plasma in relativistic heavy ion collisions using the widely-adopted AMPT (A Multi-Phase Transport) model. The global angular momentum, the average vorticity carried by the quark-gluon plasma, and the locally defined vorticity fields are computed for Au+Au collisions, with detailed information of their time evolution, spatial distribution, as well as the dependence on beam energy and collision centrality.