Pedagogic model for Deeply Virtual Compton Scattering with quark-hadron duality

Abstract

We show how quark-hadron duality can emerge for valence spin averaged structure functions, and for the non-forward distributions of Deeply Virtual Compton Scattering. Novel factorisations of the non-forward amplitudes are proposed. Some implications for large angle scattering and deviations from the quark counting rules are illustrated.

Comments: Version accepted by Phys. Rev. D