Color Dipole Systematics of the Diffraction Slope in Diffractive Photo-   and Electroproduction of Vector Mesons
  We present the first evaluation of the color dipole diffraction slope from the data on diffractive photo- and electroproduction of vector mesons. The energy and dipole size dependence of the found dipole diffraction slope are consistent with the color dipole gBFKL dynamics. 
J. Nemchik