Saturation and High Density QCD

Abstract

Recent progress in understanding general properties of high energy scattering near the unitarity limit, where high density gluon components of the wavefunction are dominant, is reviewed. The similarity of the QCD problem and that of reaction-diffusion processes in statistical physics is emphasized. The energy dependence of the saturation momentum and the status of geometric scaling are discussed.

Comments: Talk given at "QCD at Cosmic Energies," Erice, 29 August-5 September, 2004, 9 pages, 5 eps figures