  At very high energies, the relevant component of the hadron wavefunction can
be described as a Color Glass Condensate, i.e., a state of high density gluonic
matter whose distribution is random, but frozen over the relevant time scales.
The weight function for this distribution obeys a renormalization group
equation in the form of a functional Fokker-Planck equation. Its solution leads
to an effective theory which predicts gluon saturation at sufficiently high
energy, or small Bjorken's $x$.
