Unitarity effects in hard diffraction at HERA

A.B. Kaidalov , V.A. Khoze , A.D. Martin , M.G. Ryskin

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classification ✦ hep-ph

keywords diffractiveeffectshardunitarityalreadybreakingchangesdeep

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We study how factorization breaking changes when going from diffractive deep inelastic scattering to diffractive photoproduction of dijets. These processes offer a sensitive probe of the interplay of soft and hard mechanisms in QCD. We demonstrate that unitarity effects are already important in the gluon distribution for x ~ 10^{-4}, for quite a wide range of Q^2.

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Unitarity effects in hard diffraction at HERA

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