Power corrections of off-forward quark distributions and harmonic operators with definite twist

Abstract

A group theoretical procedure for parametrizing non-forward matrix elements of non-local QCD operators is introduced. The related (two-variable) distribution amplitudes are given as sum over power corrections of the double distributions. For totally symmetric (local) operators the infinite twist decomposition is given completely and for operators with non-trivial symmetry type up to twist 3. The power corrections for most of the phenomenological relevant double distributions and the vector meson wave functions are determined. They may be obtained, by harmonic extension, from the corresponding operators or distribution amplitudes on the light-cone.

26 pages, Revtex; addition of references, correction of few typos

References in corpus (3)

• Resummation of target mass corrections in two-photon processes: twist-two sector
• A Note on Wandzura-Wilczek Relations
• Wandzura-Wilczek-type relations of $\rho$-meson wave functions

Cited by in corpus (14)

• Generalized Parton Distributions
• Unraveling hadron structure with generalized parton distributions
• Twist-3 GPDs in Deeply-Virtual Compton Scattering
• Target mass corrections for virtual Compton scattering at twist-2 and generalized, non-forward Wandzura-Wilczek and Callan-Gross relations
• B-Meson Distribution Amplitudes of Geometric Twist vs. Dynamical Twist
• Target mass and finite $t$ corrections to diffractive deeply inelastic scattering
• Target mass and finite momentum transfer corrections to unpolarized and polarized diffractive scatterin
• Target mass effects in deep-inelastic scattering on the deuteron
• Polarized Deep Inelastic Diffractive ep Scattering: Operator Approach
• On the structure of the virtual Compton amplitude with additional final-state meson in the extended Bjorken region
• Heavy Meson Distribution Amplitudes of Definite Geometric Twist with Contribution of 3-Particle Distribution Amplitudes
• The twist-2 Compton operator and its hidden Wandzura-Wilczek and Callan-Gross relations
• Twist cut-off for scalar off-cone operators in q-space
• Group Theoretical Analysis of Light-Cone Dominated Hadronic Processes and Twist Decomposition of Nonlocal Operators in Quantum Chromodynamics