Anisotropic flow measured from multi-particle azimuthal correlations for Pb-Pb collisions at 2.76 TeV by ALICE at the LHC

TL;DR

This paper presents detailed measurements of anisotropic flow harmonics in Pb-Pb collisions at 2.76 TeV, using multi-particle correlations to probe initial state fluctuations and improve understanding of heavy-ion collision dynamics.

Contribution

It provides comprehensive experimental data on flow harmonics and symmetry plane correlations, enhancing insights into initial condition fluctuations in heavy-ion collisions.

Findings

Measurement of flow harmonics $v_n$ using multi-particle cumulants

Analysis of inter-correlations among symmetry planes $\\Psi_n$

Insights into initial condition fluctuations

Abstract

We report on the measurement of various flow harmonics, $v_n$, with multi-particle cumulants, and present the results from a study of the inter-correlation among different order symmetry planes $\Psi_n$ via multi-particle mixed harmonic correlations. This provides comprehensive experimental information on the fluctuating event-by-event shape of the initial conditions, which is currently among the main sources of large theoretical uncertainties in describing the evolution of the system created in heavy-ion collisions.