The Use of Dispersion Relations in Hard Exclusive Processes and the Partonic Interpretation of Deeply Virtual Compton Scattering
arXiv:0905.4753 · doi:10.1103/PhysRevD.80.071501
Abstract
Recently dispersion relations have been applied to hard exclusive processes such as deeply virtual Compton scattering, and a holographic principle was proposed that maps out the generalized parton distributions entering the soft matrix elements for the processes from their values on a given kinematical ridge. We examine possible pitfalls associated with the implicit, direct identification in this approach of the physical hadronic states with colored partons, and suggest an improved treatment of this assumption.
arXiv comment4 pages, 3 figures
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- DVCS and the skewness effect at small x
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- Investigating Partons' Transverse Spin with Deep Inelastic Exclusive Experiments
- Strategies to Extract Generalized Parton Distributions from Data