ALICE measurements of flow coefficients and their correlations in small (pp and p-Pb) and large (Xe-Xe and Pb-Pb) collision systems

TL;DR

This paper presents measurements of flow coefficients and their correlations across various collision systems at the LHC, revealing insights into collective effects in both small and large systems using a new subevent technique.

Contribution

First measurements of flow coefficients and their correlations in multiple collision systems using a novel subevent method, enhancing understanding of collective phenomena.

Findings

Flow coefficients show similar behavior in small and large systems.

The subevent technique improves the accuracy of flow measurements.

Results suggest collective effects are present across different collision systems.

Abstract

Many observables which are used as a signature of the collective effects in heavy-ion collisions when measured in high multiplicity pp and pA interactions reveal a very similar behaviour. We will present first measurements of different order flow coefficients and their magnitude correlations for data collected by ALICE during the LHC Run 2 operation, which includes pp collisions at $\sqrt{s} = 13$ TeV, p-Pb at $\sqrt{s_{\rm{NN}}} = 5.02$ TeV, Xe-Xe at $\sqrt{s_{\rm{NN}}} = 5.44$ TeV and Pb-Pb collisions at $\sqrt{s_{\rm{NN}}} = 5.02$ TeV. Such a broad spectrum of colliding systems with different energies and wide range of multiplicity allow for detailed investigation of their collision dynamics. The measurements are based on a newly developed subevent technique, which was proven to be particularly important for studies in small systems. The results provide an important insight into the nature of collective phenomena in different collision systems.