# The ridge effect and three-particle correlations

## TL;DR

This paper investigates the three-particle correlations in high-energy collisions using a correlated-cluster model, highlighting the necessity of azimuthal cluster correlations to explain the near-side ridge effect.

## Contribution

It extends a cluster model to three-particle correlations, demonstrating the importance of azimuthal cluster correlations in understanding the ridge phenomenon.

## Key findings

- Azimuthal cluster correlations are essential for explaining the near-side ridge.
- The model successfully describes three-particle correlations in proton-proton and heavy-ion collisions.
- Generalizes previous two-particle correlation analysis to higher-order correlations.

## Abstract

Pseudorapidity and azimuthal three-particle correlations are studied based on a correlated-cluster model of multiparticle production. The model provides a common framework for correlations in proton-proton and heavy-ion collisions allowing easy comparison with the measurements. It is shown that azimuthal cluster correlations are definitely required in order to understand three-particle correlations in the near-side ridge effect. This is similar to the explanation of the ridge phenomenon found in our previous analysis of two-particle correlations and generalizes the model to higher-order correlations.