Diffractive Hard Scattering with a Coherent Pomeron
arXiv:hep-ph/9212212 · doi:10.1016/0370-2693(93)90206-W
Abstract
Diffractive scattering involves exchange of a Pomeron to make a rapidity gap. It is normally assumed that to get a hard scattering in diffraction, one may treat the Pomeron as an ordinary particle, which has distributions of gluons and quarks. We show that this is not so: When we use perturbative QCD, there is a breakdown of the factorization theorem. The whole Pomeron can initiate the hard scattering, even though it is not point-like. Qualitatively, but not quantitatively, this gives the same effect as a delta function term in the gluon density in a Pomeron.
13 pages (+ 5 figures, not included), LaTeX, PSU/TH/116
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