Speaker
Description
Quantum Chromodynamics describes hadrons in terms of quarks and gluons (partons). In this framework, generalized parton distributions (GPDs) encode the off-forward structure of hadrons, and their convolutions with hard scattering kernels define the Compton form factors (CFFs) through which Feynman amplitudes can be described. The real and imaginary parts of the CFFs are related through the so-called dispersion relations (DRs).
It is known that at the lowest order approximation, these DRs provide access to the gravitational form factor (GFF)--charactering the QCD energy-momentum tensor--that encodes the information on the hadron's internal pressure. Recently, we proved that by introducing kinamatic power corrections (i.e. accounting for recoil and target mass corrections), these DRs provide further information on the momenta distributions of partons--also encoded in GFFs--offering a broader description of the energy-momentum tensor via exclusive scattering processes.