Quantum Chromodynamics, the theory of quarks and gluons, whose interactions can be
described by a local SU (3) gauge symmetry with charges called “color quantum numbers” …

We give an overview of the theory for generalized parton distributions. Topics covered are
their general properties and physical interpretation, the possibility to explore the three …

The generalized parton distributions, introduced nearly a decade ago, have emerged as a
universal tool to describe hadrons in terms of quark and gluonic degrees of freedom. They …

We outline in detail the properties of generalized parton distributions (GPDs), which contain
new information on the structure of hadrons and which enter the description of hard …

More than three decades ago, the European Muon Collaboration published a surprising
result on the spin structure of the proton: the spins of its three quark components account for …

Recently, there have been some interesting developments involving off-forward parton
distributions of the nucleon, deeply virtual Compton scattering, and hard diffractive vector …

We review the phenomenological framework for accessing Generalized Parton Distributions
(GPDs) using measurements of Deeply Virtual Compton Scattering (DVCS) from a proton …

We compute the cross section for leptoproduction of the real photon off the nucleon, which is
sensitive to the deeply virtual Compton scattering amplitude with power accuracy. Our …

The gravitational form factors (GFFs) of hadrons encode the matrix elements of the energy-
momentum tensor of QCD. These quantities describe how energy, spin, and various …

We show that factorization holds for the deeply virtual Compton scattering amplitude in QCD,
up to power suppressed terms, to all orders in perturbation theory. The theorem applies to …