Azimuthal distribution of mean transverse rapidity in relativistic heavy ion collisions

TL;DR

This paper investigates the azimuthal distribution of mean transverse rapidity in relativistic heavy ion collisions using AMPT model simulations, showing it as an effective probe of radial kinetic expansion and its anisotropic features.

Contribution

It introduces the azimuthal distribution of mean transverse rapidity as a novel observable for studying radial expansion in heavy ion collisions.

Findings

Azimuthal distribution of mean transverse rapidity effectively probes radial kinetic expansion.

Anisotropic distribution reflects the anisotropic nature of radial expansion.

Isotropic part combines thermal motion and isotropic radial expansion.

Abstract

By the sample generated by the AMPT with string melting model, we compare the azimuthal distributions of multiplicity, total transverse rapidity, and mean transverse rapidity. It is demonstrated that the azimuthal distribution of mean transverse rapidity is a good probe of the radial kinetic expansion. The anisotropic part of the distribution characterizes the anisotropic nature of the radial expansion, and isotropic part is combinations of thermal motion and isotropic radial expansion.