Speaker
Description
We present a further step toward a global extraction of generalized parton distributions (GPDs) in the Generalized parton distributions through universal moment parameterization (GUMP) framework. We include HERA measurements of Deeply Virtual Meson Production (DVMP) in order to study gluon GPDs at non-zero skewness using the same moment parameterization ansatz as the previous global fit which included lattice QCD calculations and experimental measurements. We concentrate our study on the production of $J/\psi$ mesons, where the main contribution to the amplitudes comes from the gluon GPDs, and we combine collinear factorization to next to leading order in the expansion in $\alpha_s$ with the leading power corrections in $M_{J/\psi}^2/Q^2$ from non-relativistic QCD.
