Diffractive parton distributions from perturbative QCD |
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| Authors: | A?D?Martin M?G?Ryskin Email author" target="_blank">G?WattEmail author |
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| Institution: | (1) Institute for Particle Physics Phenomenology, University of Durham, DH1 3LE, UK;(2) Petersburg Nuclear Physics Institute, 188300 Gatchina, St. Petersburg, Russia;(3) Deutsches Elektronen-Synchrotron DESY, 22607 Hamburg, Germany |
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| Abstract: | 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.Received: 20 April 2005, Published online: 27 July 2005 |
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