Diffractive parton distributions from the saturation model |
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| Authors: | K Golec-Biernat M Wüsthoff |
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| Institution: | II. Institut für Theoretische Physik, Universit?t Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany, DE
Department of Physics, University of Durham, Durham DH1 3LE, UK, GB
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| Abstract: | We review diffractive deep inelastic scattering (DIS) in the light of the collinear factorization theorem. This theorem allows
one to define diffractive parton distributions in the leading twist approach. Due to its selective final states, diffractive
DIS offers interesting insight into the form of the diffractive parton distributions which we explore with the help of the
saturation model. We find Regge-like factorization with the correct energy dependence measured at HERA. A remarkable feature
of diffractive DIS is the dominance of the twist-4 contribution for small diffractive masses. We quantify this effect and
make a comparison with the data.
Received: 22 February 2001 / Revised version: 22 March 2001 / Published online: 3 May 2001 |
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