Predictions for the forward cone in diffractive DIS
  We calculate the diffraction slope $B_{D}$ for diffractive DIS. We find a counterintuitive rise of $B_{D}$ from exclusive diffractive excitation of vector mesons to excitation of continuum states with $M^{2} \sim Q^{2}$. For the small-mass continuum we predict a rapid variation of $B_{D}$ with $M^{2}$ on the scale $m_{V}^{2}$ and a sharp drop of $B_{D}$ for a small-mass continuum above the vector meson excitation. 
N.N. Nikolaev (Julich, Forschungszentrum & Landau Inst.), A.V.   Pronyaev (Virginia Tech), B.G. Zakharov (Landau Inst.)