Deeply-Virtual Compton Scattering on Deuterium and Neon at HERMES

Details Deeply-Virtual Compton Scattering on Deuterium and Neon at HERMES Deeply-Virtual Compton Scattering on Deuterium and Neon at HERMES

2002-12-09

arxiv.org/abs/hep-ex/0212019v1

Physics

High Energy Physics

High Energy Physics - Experiment

5 pages, 6 figures. Talk given by F. Ellinghaus at the "15th International Spin Physics Symposium", SPIN 2002, September 9-14,

Scientific paper

10.1063/1.1607148

We report the first observation of azimuthal beam-spin asymmetries in hard electroproduction of real photons off nuclei. Attributed to the interference between the Bethe-Heitler process and the deeply-virtual Compton scattering process, the asymmetry gives access to the latter at the amplitude level. This process appears to be the theoretically cleanest way to access generalized parton distributions. The data presented here have been accumulated by the HERMES experiment at DESY, scattering the HERA 27.6 GeV positron beam off deuterium and neon gas targets.

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