Saturation in DIS processes

We examine HERA data with a view of determining whether unique signs of saturation can be identified. Concentrating on two channels the logarithmic slope of $F_2$, and the production of $J\mathrm{/}\mathrm{\Psi }$, which are sensitive to the behaviour of $xG(x,Q^2)$ the gluon density distribution in the proton, we show that our model incorporating screening corrections and alternative models comprising a sum of a “soft” and “hard” component provide good fits to the data.