REU program report: Jocelyn Robbins, Melinda Yuan (2022)
The goal of Double Deeply Virtual Compton Scattering (DDVCS) experiments is to better understand
the internal structure of the nucleon. Previous attempts to resolve the internal structure of nucleons
have resulted in electromagnetic form factors and parton distribution functions for elastic scattering and
deep inelastic scattering processes, respectively. Generalized Parton Distributions (GPDs) are the latest
attempt to unify these models of nucleon structure. The GPDs of DDVCS give us ability to investigate
off of the diagonal where x ̸ = ±ξ. The main goal of our analysis is to determine the best experimental
setup in order to deduce the kinematic variables on which GPDs depend from the lab observables. The
effectiveness of our data collection in the laboratory is by determined the physical kinematics, Q 2 , Q ′2 ,t,
x i ,ϕ LM , ϕ CM V , and θ CM V . We can then run the DDVCS experiments and collect data, which is implicitly
used to calculate the GPD of the nucleon