Pion production in deeply virtual Compton scattering

Abstract

Using a soft pion theorem based on chiral symmetry and a $\Delta (1232)$ resonance model we propose an estimate for the production cross section of low energy pions in the deeply virtual Compton scattering (DVCS) process. In particular, we express the $ep\to e\gamma \pi N$ processes in terms of generalized parton distributions. We provide estimates of the contamination of the $ep\to e\gamma p$ DVCS observables due to this associated pion production processes when the experimental data are not fully exclusive, for a set of kinematical conditions representative of present or planned experiments at JLab, HERMES and COMPASS.

50 pages, 22 figures

Cited by in corpus (21)

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