Multiplicity distributions and long range rapidity correlations

TL;DR

This paper reviews recent advances in calculating multi-gluon correlations within the Color Glass Condensate framework, highlighting how dense systems like nucleus-nucleus collisions facilitate these computations compared to proton-proton interactions.

Contribution

It introduces new methods for computing multi-gluon correlations in the CGC framework, emphasizing the ease of calculations in dense systems.

Findings

Multi-gluon correlations are more accessible in dense systems.

Recent progress enhances understanding of initial conditions in heavy ion collisions.

The CGC framework effectively models nonlinear gluonic interactions.

Abstract

The physics of the initial conditions of heavy ion collisions is dominated by the nonlinear gluonic interactions of QCD. These lead to the concepts of parton saturation and the Color Glass Condensate (CGC). We discuss recent progress in calculating multi-gluon correlations in this framework, prompted by the observation that these correlations are in fact easier to compute in a dense system (nucleus-nucleus) than a dilute one (proton-proton).