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Generalized Parton Distributions (GPDs) provide a three-dimensional parametrization of the quarks and gluons inside the nucleon, which provides a particularly valuable insight on the orbital angular momentum of quarks and gluons. GPDs may be determined with measurement of exclusive electroproduction processes such as Deeply Virtual Compton Scattering (DVCS) eN→ eNγ . In particular, measurement on the neutron, combined with measurements on the proton, provides a particularly interesting combination of observables which give a strong constraint on the orbital angular momentum of partons. We propose to measure the Deeply Virtual Compton Scattering (DVCS) on the neutron, using a deuterium target, and with spectator proton tagging. Such a technique allows to unambiguously identify the neutron-DVCS events from proton and coherent deuterium DVCS events, and to apply corrections to the nuclear effect of the neutron in the deuteron. We describe here this experiment, its assets, and projections will be discussed.

Deeply Virtual Compton Scattering off the Neutron with Spectator Proton Tagging in Hall A at Jefferson Laboratory