Dual parameterization and Abel transform tomography for twist-3 DVCS

Details Dual parameterization and Abel transform tomography for twist-3 DVCS Dual parameterization and Abel transform tomography for twist-3 DVCS

2008-03-12

arxiv.org/abs/0803.1777v1

Nucl. Phys. B832 (2010) 241

Physics

High Energy Physics

High Energy Physics - Phenomenology

11 pages, 1 eps figure

Scientific paper

We derive dual parameterization for the DVCS amplitude to the twist-3 accuracy. The relation of the dual parameterization to the Abel transform tomography for amplitudes of hard exclusive processes is elaborated. We prove dispersion relations for the twist-3 DVCS amplitude in the Wandzura -- Wilczek approximation and show that the subtraction constant is given by the D-term form factor. The same as in the case of twist-2 DVCS amplitude.

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