Probing Azimuthal Alignment in Heavy-Ion Collisions: Clusterization Effects

TL;DR

This paper investigates how clustering and event selection influence azimuthal alignment phenomena in heavy-ion collisions, revealing that clustering enhances the understanding of alignment patterns through momentum conservation effects.

Contribution

It demonstrates the role of clustering in analyzing azimuthal alignment and highlights the combined effects of cluster formation and momentum conservation in heavy-ion collision models.

Findings

High alignment degree observed at cluster level

Clustering improves resolution of particle groups

Clusterization affects azimuthal correlation patterns

Abstract

The influence of kinematic constraints and event selection on the emergence of the alignment phenomenon observed in cosmic-ray experiments is studied within the HYDJET++ model. It is demonstrated that the high degree of alignment, previously identified for realistic values of the transverse momentum disbalance of the most energetic particles, is also observed at the level of the most energetic clusters. In high-multiplicity events, the clustering procedure plays a crucial role in resolving individual particle groups on the detection plane, allowing a more accurate characterization of alignment patterns. These results highlight the combined effects of cluster formation and momentum conservation in shaping the observed azimuthal correlations.