Pion production in deeply virtual Compton scattering
P. A. M. Guichon, L. Mossé, M. Vanderhaeghen
Abstract
Using a soft pion theorem based on chiral symmetry and a Δ(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 e p e γπN processes in terms of generalized parton distributions. We provide estimates of the contamination of the e p e γp 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.
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