Speaker
Gastão Krein
Description
Femtoscopy measurements of $J/\psi$-proton correlation functions in high-energy hadron collisions can access information on the matter distribution in the proton. The QCD multipole expansion allows us to express the $J/\psi$-proton scattering amplitude in terms of the product of the $J/\psi$ chromopolarizability and a scalar gluon gravitational (GFF) form factor. The scalar gluon GFF gives the gluonic contribution to the nucleon mass and determines the corresponding matter radius. We show the Jpsi-proton
correlation function displays clear sensitivity to the scalar gluon GFF for a wide range of the $J/\psi$ chromopolarizability.
