[Deeppwg] Abstract for GHP2025

[pilleux]

Dear all,
I have been invited to talk at the 11th workshop of the APS Topical 
Group on Hadronic Physics in Anaheim, CA, USA, from March 14 to 16, 2025 
(https://indico.jlab.org/event/868/).
Please find an abstract below and let me know if you have comments. The 
deadline for abstract submission is Nov 30th, I apologize for the short 
notice. I will be presenting updated, and still preliminary results 
using RGC data, for which I would request a release at the beginning of 
2025 if possible.
Thank you. Best regards, Noémie.

"DVCS at CLAS12 on Longitudinally Polarized Protons and Neutrons in 
Deuterium"
Generalized Partons Distributions (GPDs) give a 3-dimensional 
description of the structure of the nucleon, and give insights into the 
origin of its spin and the forces at play within it. The study of the 
Deeply Virtual Compton Scattering (DVCS) reaction with both polarized 
protons and neutrons is important for the complete extraction of GPDs 
and of their flavor dependency. Part of the Run Group C (RGC) 
experimental program with the CLAS12 detector at Jefferson Lab aims to 
measure, for the first time, the DVCS target-spin and double-spin 
asymmetries on protons and neutrons in deuterium. RGC relies on 
longitudinally polarized hydrogenated- and deuterated-ammonia targets.  
An overview of the experiment and of the analysis for DVCS on protons 
and neutrons in deuterium will be presented, highlighting the challenges 
of working with a polarized nuclear target, the techniques that have 
been developed to address them, and preliminary results for the 
asymmetries.