[Deeppwg] Abstract for DIS 2024

[pilleux at jlab.org]

Dear all,
Please find below an abstract that I would like to submit for the DIS
conference, to talk about the Run Group C measurement of DVCS on Polarized
Nucleons. I would be happy to take into account your comments or
suggestions.
Thank you. Best regards, Noémie Pilleux.


DVCS on Polarized Nucleons with the CLAS12 experiment at Jefferson Lab

Deeply Virtual Compton Scattering is the most direct channel to access
Generalized Partons Distributions (GPDs) and understand more about the 3D
structure of the nucleon, the origin of its spin and the forces at play
within it. Complete extraction of GPDs requires the use of polarized
electron beams and polarized nucleon targets in DVCS measurements.

The first polarized target experiment of the CLAS12 program at JLab took
place last year, scattering 10.6 GeV electrons on
longitudinally polarized protons and neutrons in hydrogen and deuterium
targets. It is of high interest for DVCS measurements as it will allow to
measure the target-spin and double-spin asymmetries for the first time for
neutrons. These results will allow to extract neutron Compton Form Factors
over a large phase-space and access the H and E GPDs for the neutron.
Combining results on the proton and the neutron will allow for flavor
decomposition of GPDs. Preliminary asymmetry extraction has been performed
and will be presented, with highlights on the analysis tools that have
been specifically developed to work with a polarized nuclear target.