Genuine twist-3 contributions to the generalized parton distributions from instantons
arXiv:hep-ph/0212372
Abstract
The genuine twist-3 quark-gluon contributions to the Generalized Parton Distributions (GPDs) are estimated in the model of the instanton vacuum. These twist-3 effects are found to be parametrically suppressed relative to the ``kinematical'' twist-3 ones due to the small packing fraction of the instanton vacuum. We derive exact sum rules for the twist-3 GPDs.
arXiv comment17 pages
References in corpus (9)
- Wave Functions, Evolution Equations and Evolution Kernels from Light-Ray Operators of QCD
- Deeply Virtual Compton Scattering
- The theory and phenomenology of polarized deep inelastic scattering
- Observation of exclusive DVCS in polarized electron beam asymmetry measurements
- On the gauge invariance of the DVCS amplitude
- DVCS amplitude at tree level: Transversality, twist-3, and factorization
- Wandzura-Wilczek approximation for the twist-3 DVCS amplitude
- An exact sum rule for transversely polarized DIS
- Helicity-dependent Twist-two and Twist-three Generalized Parton Distributions in Light-front QCD
Cited by in corpus (4)
- Large-Momentum Effective Theory
- Novel twist-three transverse-spin sum rule for the proton and related generalized parton distributions
- Dual parameterization and Abel transform tomography for twist-3 DVCS
- NLO corrections to the twist-3 amplitude in DVCS on a nucleon in the Wandzura-Wilczek approximation: quark case