Evidence for Factorization Breaking in Diffractive Low-Q^2 Dijet Production

Details Evidence for Factorization Breaking in Diffractive Low-Q^2 Dijet Production Evidence for Factorization Breaking in Diffractive Low-Q^2 Dijet Production

2004-10-07

arxiv.org/abs/hep-ph/0410105v1

Phys.Rev.Lett. 93 (2004) 232002

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, 3 figures

Scientific paper

10.1103/PhysRevLett.93.232002

We calculate diffractive dijet production in deep-inelastic scattering at next-to-leading order of perturbative QCD, including contributions from direct and resolved photons, and compare our predictions to preliminary data from the H1 collaboration at HERA. In contrast to recent experimental claims, evidence for factorization breaking is found only for resolved, and not direct, photon contributions. No evidence is found for large normalization uncertainties in diffractive parton densities. The results confirm theoretical expectations for the (non-)cancellation of soft singularities in diffractive scattering as well as previous results for (almost) real photoproduction.

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