New More Precise Results on DVCS from Nuclear Targets

Abstract

Measurements of Deeply Virtual Compton Scattering on nuclear targets are reported, performed using the 27.6 GeV longitudinally polarized lepton beam of HERA and various nuclear targets of the HERMES experiment. All possible azimuthal asymmetries are extracted, with a detailed estimation of systematic uncertainties. The asymmetries of interest for coherent-enriched and incoherent-enriched regions are compared to those for the free proton, and in both cases the ratios are found to be compatible with unity.