Fluctuations of anisotropic flow from the finite number of rescatterings in a two-dimensional massless transport model

TL;DR

This paper examines how finite scatterings in a 2D massless particle system cause fluctuations in anisotropic flow, revealing how flow coefficients and event plane distributions vary with scattering frequency.

Contribution

It introduces a detailed analysis of flow fluctuations in a 2D massless transport model using Monte Carlo Glauber initial conditions, highlighting the impact of scattering frequency.

Findings

Flow coefficients fluctuate around their mean values.

Distributions of event planes evolve with the number of scatterings.

Fluctuation patterns depend on the scattering cross section.

Abstract

We investigate the fluctuations of anisotropic transverse flow due to the finite number of scatterings in a two-dimensional system of massless particles. Using a set of initial geometries from a Monte Carlo Glauber model, we study how flow coefficients fluctuate about their mean value at the corresponding eccentricity, for several values of the scattering cross section. We also show how the distributions of the second and third event planes of anisotropic flow about the corresponding participant plane in the initial geometry evolve as a function of the mean number of scatterings in the system.