# Higher-order anisotropies in the Blast-Wave Model - disentangling flow and density field anisotropies

## TL;DR

This paper extends the blast-wave model to include higher-order azimuthal anisotropies in hadron production, analyzing how flow and density anisotropies affect particle distributions and correlations.

## Contribution

It introduces a generalized blast-wave model that separately accounts for anisotropies in density and flow, specifically addressing third-order anisotropy effects.

## Key findings

- Third-order anisotropy significantly influences particle correlations.
- Density and flow anisotropies have distinct impacts on observables.
- Averaging over event plane orientations affects anisotropy measurements.

## Abstract

We formulate a generalisation of the blast-wave model which is suitable for the description of higher order azimuthal anisotropies of the hadron production. The model includes anisotropy in the density profile as well as an anisotropy in the transverse expansion velocity field. We then study how these two kinds of anisotropies influence the single-particle distributions and the correlation radii of two-particle correlation functions. Particularly we focus on the third-order anisotropy and consideration is given to the averaging over different orientation of the event plane.