Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2003-07-31
Phys.Rept.388:41-277,2003
Physics
High Energy Physics
High Energy Physics - Phenomenology
226 pages, 47 figures. v2: Small corrections and a note added
Scientific paper
10.1016/j.physrep.2003.08.002
We give an overview of the theory for generalized parton distributions. Topics covered are their general properties and physical interpretation, the possibility to explore the three-dimensional structure of hadrons at parton level, their potential to unravel the spin structure of the nucleon, their role in small-x physics, and efforts to model their dynamics. We review our understanding of the reactions where generalized parton distributions occur, to leading power accuracy and beyond, and present strategies for phenomenological analysis. We emphasize the close connection between generalized parton distributions and generalized distribution amplitudes, whose properties and physics we also present. We finally discuss the use of these quantities for describing soft contributions to exclusive processes at large energy and momentum transfer.
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