Generalized quasi parton distributions in a diquark spectator model

Understand

Recently the concept of quasi parton distributions (quasi-PDFs) for hadrons has been proposed.

• Quasi-PDFs are defined through spatial correlation functions and as such can be computed numerically using quantum chromodynamics on a four-dimensional lattice.
• As the hadron momentum is increased, the quasi-PDFs converge to the corresponding standard PDFs that appear in factorization theorems for many high-energy scattering processes.
• Here we investigate this new concept in the case of generalized parton distributions (GPDs) by calculating the twist-2 vector GPDs in the scalar diquark spectator model.