CCFM Evolution with Unitarity Bound

Abstract

We perform a detailed study of the CCFM evolution, complemented with an absorptive boundary which mimics the non-linear dynamics of parton saturation. We present results for the evolution of the unintegrated gluon density in the presence of saturation and extract the energy dependence of the emerging saturation momentum. We show that CCFM and BFKL evolution lead to almost identical predictions after including the effects of gluon saturation and of the running of the coupling.