Saturation and Geometrical Scaling: from Deep Inelastic ep Scattering to Heavy Ion Collisions

Abstract

Saturation of gluon distribution is a consequence of the non-linear evolution equations of QCD. Saturation implies the existence of so called saturation momentum which is defined as a gluon density per unit rapidity per transverse area. At large energies for certain kinematical domains saturation momentum is the only scale for physical processes. As a consequence different observables exhibit geometrical scaling (GS). We discuss a number of examples of GS in different reactions.

6 pages, 4 figures, presented at the Conference Excited QCD, Taranska Lomnica, Slovakia, March 8 -- 14, 2015

References in corpus (4)

• Geometrical Scaling of Direct-Photon Production in Hadron Collisions from RHIC to the LHC
• Geometrical Scaling and the Dependence of the Average Transverse Momentum on the Multiplicity and Energy for the ALICE Experiment
• Geometrical Scaling in High Energy Hadronic Collisions
• Why mean $p_{\mathrm{T}}$ is interesting

Cited by in corpus (4)

• Event-by-event mean $p_{\mathrm{T}}$ fluctuations and transverse size of color flux tube generated in $p$-$p$ collisions at $\sqrt{s}$=0.90TeV
• Geometrical scaling of prompt photons in heavy ion collisions
• Multiplicity-dependent saturation momentum in $p$-Pb collisions at 5.02 TeV
• Saturation and geometrical scaling -- from small $x$ deep inelastic ep scattering to high energy proton-proton and heavy ion collisions