Phenomenology of double deeply virtual Compton scattering in the era of new experiments

Abstract

We revisit the phenomenology of the deep exclusive electroproduction of a lepton pair, i.e. double deeply virtual Compton scattering (DDVCS), in view of new experiments planned in the near future. The importance of DDVCS in the reconstruction of generalized parton distributions (GPDs) in their full kinematic domain is emphasized. Using Kleiss-Stirling spinor techniques, we provide the leading order complex amplitudes for both DDVCS and Bethe-Heithler sub-processes. Such a formulation turns out to be convenient for practical implementation in the PARTONS framework and EpIC Monte Carlo generator that we use in simulation studies.

21 pages, 13 figures

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• Exclusive photoproduction of ${\eta }_c\gamma$ pairs with large invariant mass
• Nucleon Structure from Basis Light-Front Quantization : Status and Prospects
• Systematic description of hadron's response to non-local QCD probes: Froissart-Gribov projections in analysis of deeply virtual Compton scattering
• Photoproduction of ${\eta }_c\gamma$ pairs in CGC framework