Saturation and geometrical scaling

Abstract

We discuss emergence of geometrical scaling as a consequence of the nonlinear evolution equations of QCD, which generate a new dynamical scale, known as the saturation momentum: Qs. In the kinematical region where no other energy scales exist, particle spectra exhibit geometrical scaling (GS), i.e. they depend on the ratio pT=Qs, and the energy dependence enters solely through the energy dependence of the saturation momentum. We confront the hypothesis of GS in different systems with experimental data.

Comments: 6 pages, 4 figures, based on talk presented at XLVI International Symposium on Multiparticle Dynamics, 29 August 2016 to 02 September 2016, Seogwipo, Jeju Island, South Korea