Gluon Evolution and Saturation Proceedings

TL;DR

This paper reviews the historical development of QCD evolution equations and discusses their generalization to high-density regimes, culminating in the theory of gluon saturation via the Color Glass Condensate.

Contribution

It introduces the necessary modifications to traditional evolution equations to account for gluon saturation effects at high energies, advancing the understanding of dense partonic systems.

Findings

Development of a generalized evolution framework for high-density QCD

Introduction of the Color Glass Condensate as a saturation model

Insights into the behavior of gluons at small fractional momenta

Abstract

Almost 40 years ago, Gribov and colleagues at the Leningrad Nuclear Physics Institute developed the ideas that led to the Dokhsitzer-Gribov-Altarelli-Parisi the Baltisky-Fadin-Kuraev-Lipatov equations. These equations describe the evolution of the distributions for quarks and gluon inside a hadron to increased resolution scale of a probe or to smaller values of the fractional momentum of a hadronic constituent. I motivate and discuss the generalization required of these equations needed for high energy processes when the density of constituents is large. This leads to a theory of saturation realized by the Color Glass Condensate