Volume 346 - 23rd International Spin Physics Symposium (SPIN2018) - Parallel Session: 3D Structure of the Nucleon: GPDs and Form Factors (C. Lorce and S. Niccolai)
Deeply Virtual Compton Scattering off the Neutron with Spectator Proton Tagging in Hall A at Jefferson Laboratory
E. Fuchey
Full text: pdf
Pre-published on: 2019 August 19
Published on: 2019 August 23
Abstract
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 exclu-
sive electroproduction processes such as Deeply Virtual Compton Scattering (DVCS) $eN \rightarrow eN \gamma$.
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 coher-
ent 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.
DOI: https://doi.org/10.22323/1.346.0078
Open Access