Abstract
I present measurements of dijet and open charm cross-sections in diffractive DIS and photoproduction taken with the H1 and ZEUS detectors at the HERA accelerator. Diffractive events were identified by a rapidity gap selection. The resulting differential cross sections are compared to QCD calculations in NLO, based on parton densities extracted from inclusive diffraction. Additionally a fit of diffractive parton densities to the combined data sets of the inclusive F2D measurement and the dijet data was performed. This leads to reduced uncertainties for the gluon density.
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