Flow analysis from cumulants: a practical guide

TL;DR

This paper presents a practical implementation of a cumulant-based flow analysis method that effectively removes non-flow correlations, improving the accuracy of flow measurements in multiparticle azimuthal correlation studies.

Contribution

It introduces a new cumulant expansion technique for flow analysis that reduces contamination from non-flow effects, enhancing measurement precision.

Findings

Cumulant expansion effectively suppresses non-flow correlations.

The method improves the accuracy of flow measurements.

Practical implementation details are provided.

Abstract

We have recently proposed a new method of flow analysis, based on a cumulant expansion of multiparticle azimuthal correlations. Here, we describe the practical implementation of the method. The major improvement over traditional methods is that the cumulant expansion eliminates order by order correlations not due to flow, which are often large but usually neglected.