Generalized Parton Distributions

Details Generalized Parton Distributions Generalized Parton Distributions

2001-01-19

arxiv.org/abs/hep-ph/0101225v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

To be published in the Boris Ioffe Festschrift ``At the Frontier of Particle Physics / Handbook of QCD'', edited by M. Shifman

Scientific paper

Applications of perturbative QCD to deeply virtual Compton scattering and hard exclusive electroproduction processes require a generalization of the usual parton distributions for the case when long-distance information is accumulated in nondiagonal matrix elements of quark and gluon light-cone operators. I describe two types of nonperturbative functions parametrizing such matrix elements: double distributions and skewed parton distributions. I discuss their general properties, relation to the usual parton densities and form factors, evolution equations for both types of generalized parton distributions (GPD), models for GPDs and their applications in virtual and real Compton scattering.

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