In these proceedings, I shall review the basic concepts of perturbative QCD in its high-energy limit, emphasising the approach to the unitarity limit, usually referred to as saturation. I shall explain the basic framework showing the need for saturation, first, from a simple picture of the high-energy behaviour, then, giving a short derivation of the equation driving this evolution. In the second part, I shall exhibit an analogy with statistical physics and show how this allows to derive geometric scaling in QCD with saturation. I shall finally consider the effects of gluon-number fluctuations on this picture.
CITATION STYLE
Soyez, G. (2006). Saturation in high-energy QCD. In Brazilian Journal of Physics (Vol. 36, pp. 1194–1203). Springer New York LLC. https://doi.org/10.1590/S0103-97332006000700013
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