Suppression factors in diffractive photoproduction of dijets

Abstract

After new publications of H1 data for the diffractive photoproduction of dijets, which overlap with the earlier published H1 data and the recently published data of the ZEUS collaboration, have appeared, we have recalculated the cross sections for this process in next-to-leading order (NLO) of perturbative QCD to see whether they can be interpreted consistently. The results of these calculations are compared to the data of both collaborations. We find that the NLO cross sections disagree with the data, showing that factorization breaking occurs at that order. If direct and resolved contributions are both suppressed by the same amount, the global suppression factor depends on the transverse-energy cut. However, by suppressing only the resolved contribution, also reasonably good agreement with all the data is found with a suppression factor independent of the transverse-energy cut.

28 pages, 11 figures, 3 tables

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• Selected topics in diffraction with protons and nuclei: past, present, and future
• A fresh look at factorization breaking in diffractive photoproduction of dijets at HERA at next-to-leading order QCD
• How large is the diffractive contribution to inclusive dijet photoproduction in UPCs at the LHC?
• Diffractive dijet photoproduction at the EIC
• Factorisation breaking in diffractive dijet photoproduction at HERA?
• Single-diffractive production of dijets within the $k_t$-factorization approach