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” …

Since the parton model was introduced by Feynman more than 50 years ago, much has
been learned about the partonic structure of the proton through a large body of high-energy …

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

Inspired by a recent study by Iancu, Mueller, and Triantafyllopoulos [Phys. Rev. Lett. 128,
202001 (2022) PRLTAO 0031-9007 10.1103/PhysRevLett. 128.202001], we propose semi …

We propose a novel observable for the experimental detection of the gluon orbital angular
momentum (OAM) that constitutes the proton spin sum rule. We consider longitudinal double …

We review the present understanding of the spin structure of protons and neutrons, the
fundamental building blocks of nuclei collectively known as nucleons. The field of nucleon …

We present a general analysis of the orbital angular momentum (OAM) distribution of gluons
L g (x) inside the nucleon with particular emphasis on the small-x region. We derive a novel …

In this review, we present the current status of phenomenological research on constraining
the multi-dimensional proton (and nucleus) structure at high energies through studies of the …

Single-beam, single-target, and double spin asymmetries for hard exclusive
electroproduction of a photon on the proton e→ p→→ e′ p′ γ are presented. The data …

Given a Wigner distribution simultaneously characterizing quark transverse positions and
momenta in a proton, one can directly evaluate their cross product, ie, quark orbital angular …