Angular Correlations in Gluon Production at High Energy

TL;DR

This paper demonstrates that gluons produced in high energy hadronic collisions are inherently correlated in rapidity and emission angle, with the correlation strength influenced by the collision process and particle structure.

Contribution

It provides a model-independent argument showing intrinsic gluon correlations and highlights the limitations of common factorized approximations.

Findings

Gluons are necessarily correlated in rapidity and angle in high energy collisions.

Correlation strength varies with collision process and particle structure.

Factorized approximations underestimate the true correlations.

Abstract

We present a general, model independent argument demonstrating that gluons produced in high energy hadronic collision are necessarily correlated in rapidity and also in the emission angle. The strength of the correlation depends on the process and on the structure/model of the colliding particles. In particular we argue that it is strongly affected (and underestimated) by factorized approximations frequently used to quantify the effect.