31st International Workshop on Deep Inelastic Scattering

Generalized parton distributions through universal moment parameterization: the gluonic sector with deeply virtual J/ψ production at next-to-leading order

10 avr. 2024, 12:00

20m

Maison MINATEC, Grenoble, FRANCE

Regular parallel talk WG5: Spin and 3D Structure WG5

Orateur

M Gabriel Santiago (SURA Center for Nuclear Femtography)

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.

Documents de présentation

DIS_2024_gpds_santiago.pdf