Probing the Structure of the Pomeron

Details Probing the Structure of the Pomeron Probing the Structure of the Pomeron

1998-12-16

arxiv.org/abs/hep-ph/9812385v1

Eur.Phys.J.C10:443-460,1999

Physics

High Energy Physics

High Energy Physics - Phenomenology

33 pages, LaTeX2e, 14 figures, uses axodraw

Scientific paper

10.1007/s100520050767

We suggest that the pseudo-rapidity cut dependence of diffractive deep-inelastic scattering events at HERA may provide a sensitive test of models of diffraction. A comparison with the experimental cross section shows that the Donnachie-Landshoff model and a simple two-gluon exchange model of the pomeron model are disfavoured. However a model with a direct coupling of the pomeron to quarks is viable for a harder quark--pomeron form factor, as is a model based on the leading-twist operator contribution. We also consider a direct-coupling scalar pomeron model. We comment on the implications of these results for the determination of the partonic structure of the pomeron.

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