DVCS and the skewness effect at small x

Abstract

We analyze small-x DVCS data using flexible GPD models and compare our outcome with the full Shuvaev transformation. We point out that the full Shuvaev transform is a model that is equivalent to a conformal GPD and a minimalist ``dual'' parameterization. Some mathematical subtleties of conformal representations are recalled. We also comment on a speculation of a factorization breakdown in DVCS.

DIS09 contribution + comment, 7 pages, 4 figures, LaTeX, dis09.cls needed

References in corpus (6)

• Deeply virtual Compton scattering at small x_B and the access to the GPD H
• A measurement of the Q^2, W and t dependences of deeply virtual Compton scattering at HERA
• On "dual" parametrizations of generalized parton distributions
• Analytic Properties of Hard Exclusive Amplitudes
• The Use of Dispersion Relations in Hard Exclusive Processes and the Partonic Interpretation of Deeply Virtual Compton Scattering
• Fitting DVCS at NLO and beyond

Cited by in corpus (4)

• Saturation effects in exclusive rhoT, rhoL meson electroproduction
• Towards a global analysis of generalized parton distributions
• Global analysis of generalized parton distributions -- collider kinematics --
• Diffraction and Vector Mesons Working Group Summary