Anisotropic flows from colour strings: Monte-Carlo simulations

TL;DR

This paper demonstrates through Monte-Carlo simulations that anisotropic flows in high-energy collisions can be explained by the colour string model with fusion, percolation, and particle quenching mechanisms inspired by QED, with flow magnitudes increasing at higher energies.

Contribution

It introduces a novel Monte-Carlo simulation approach incorporating anisotropic particle emission and quenching in the colour string model, explaining flow phenomena in high-energy collisions.

Findings

Flow values increase with collision energy.

Flow at LHC energies exceeds RHIC by about 15%.

Anisotropic flow can be modeled via string fusion and quenching mechanisms.

Abstract

By direct Monte-Carlo simulations it is shown that the anisotropic flows can be successfully described in the colour string picture with fusion and percolation provided anisotropy of particle emission from the fused string is taken into account. Quenching of produced particles in the strong colour field of the string is the basic mechanism for this anisotropy. The concrete realization of this mechanism is borrowed from the QED. Due to dependence of this mechanism on the external field strength the found flows grow with energy, with values for $v_2$ at LHC energies greater by ~15% than at RHIC energies.