Deeply Virtual Compton Scattering at HERA

Abstract

The Deeply Virtual Compton Scattering (DVCS) ${\gamma }^{\ast }p\to \gamma p$ cross section has been measured with the H1 detector at HERA with an increased precision and in an extended kinematic domain: at photon virtualities $4<Q^2<80$ GeV${}^2$, and photon-proton c.m.s. energy $30<W<140$ GeV. The measurement is compared to NLO QCD calculations and to Colour Dipole model predictions.

4 pages, 4 figs, Proceedings of DIS04