$F_{2}^{D(4)}$ in the Model of the Stochastic Vacuum

In this paper a calculation for the diffractive structure functions $F_{L}^{D(4)}$ and $F_{T}^{D(4)}$ using an eikonal approximation is presented. A modified version of the model of the stochastic vacuum that includes an energy dependence is used to calculate the scattering amplitude of two Wilson loops which in our approach describe the color dipole interaction. Numerical results are presented in the $\beta$ region where the non-perturbative effects are expected to be large. The DIS diffractive cross section is also discussed. Our calculation for the diffractive slope in $t$ is in good agreement with the experiment.