Generalized parton distributions through universal moment parameterization: non-zero skewness case

We present the first global analysis of generalized parton distributions (GPDs) combing lattice quantum chromodynamics (QCD) calculations and experiment measurements including distribution functions (PDFs), form factors (FFs) deeply virtual Compton scattering (DVCS) measurements. Following previous work where we parameterize GPDs in terms their moments, extend framework to allow for at non-zero skewness. Together with constraints zero skewness, fit DVCS from both recent JLab earlier Hadron-Electron Ring Accelerator (HERA) experiments two active quark flavors leading order QCD evolution. With certain choices empirical constraints, sea valence are extracted combined inputs, proton correspondingly. also discuss how accommodate more off-forward beyond small $\xi$ expansion, especially calculated GPDs.