Diffractive dijet photoproduction

Talk presented at DIS 2005, 5 pages, 2 figuresWe have calculated diffractive dijet production in deep-inelastic scattering (DIS) at low-Q$^2$ and next-to-leading order (NLO) of perturbative QCD, including contributions from direct and resolved photons. We study how the cross section depends on the factorization scheme and scale M$_\gamma$ at the virtual photon vertex for the occurance of factorization breaking. The strong M$_\gamma$-dependence, which is present when only the resolved cross section is suppressed, is tamed by intodrucing the suppression also in the initial-state NLO correction of the direct part