Diffractive parton distributions from perturbative QCD

Details Diffractive parton distributions from perturbative QCD Diffractive parton distributions from perturbative QCD

2005-04-15

arxiv.org/abs/hep-ph/0504132v2

Eur.Phys.J.C44:69-85,2005

Physics

High Energy Physics

High Energy Physics - Phenomenology

34 pages, 13 figures. Version published in Eur. Phys. J. C

Scientific paper

10.1140/epjc/s2005-02341-7

The asymptotic collinear factorisation theorem, which holds for diffractive deep-inelastic scattering, has important modifications in the sub-asymptotic HERA regime. We use perturbative QCD to quantify these modifications. The diffractive parton distributions are shown to satisfy an inhomogeneous evolution equation. We emphasise that it is necessary to include both the gluonic and sea-quark t-channel components of the perturbative Pomeron. The corresponding Pomeron-to-parton splitting functions are derived in the Appendix.

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