Apr 8 – 12, 2024
Maison MINATEC, Grenoble, FRANCE
Europe/Paris timezone

DVCS on Polarized Nucleons with the CLAS12 experiment at Jefferson Lab

Apr 10, 2024, 10:10 AM
Maison MINATEC, Grenoble, FRANCE

Maison MINATEC, Grenoble, FRANCE

3 Parv. Louis Néel, 38054 Grenoble
Regular parallel talk WG5: Spin and 3D Structure WG5


Noémie Pilleux (IJCLab, Université Paris Saclay)


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. The 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 on 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 the flavor decomposition of GPDs. A 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.

Primary author

Noémie Pilleux (IJCLab, Université Paris Saclay)

Presentation materials