Radial flow in a multi phase transport model at FAIR energies

TL;DR

This study uses a multiphase transport model to analyze azimuthal distributions of radial velocities in nucleus-nucleus collisions at FAIR energies, providing insights into collective radial expansion and thermal motion.

Contribution

It introduces a detailed analysis of radial velocity distributions at FAIR energies, linking azimuthal anisotropies to collective expansion in a multiphase transport framework.

Findings

Radial velocity distributions show anisotropic and isotropic components.

Mean radial velocity is a good probe for radial expansion.

Results are relevant for upcoming CBM experiments at FAIR.

Abstract

Azimuthal distributions of radial velocities of charged hadrons produced in nucleus-nucleus $(AB)$ collisions are compared with the corresponding azimuthal distribution of charged hadron multiplicity in the framework of a multiphase transport (AMPT) model at two different collision energies. The mean radial velocity seems to be a good probe for studying radial expansion. While the anisotropic part of the distributions indicates a kind of collective nature of radial expansion, the isotropic part characterizes a thermal motion. The present investigation is carried out keeping the upcoming Compressed Baryonic Matter (CBM) experiment to be held at the Facility for Anti-proton Ion Research (FAIR) in mind. As far as high-energy heavy-ion interactions are concerned, CBM will supplement the Relativistic Heavy Ion Collider (RHIC) and Large Hadron Collider (LHC) experiments. In this context our simulation results at high baryochemical potential would be interesting, when scrutinized from the perspective of almost a baryon free environment achieved at RHIC and LHC.