This report describes the physics case, the resulting detector requirements, and the evolving
detector concepts for the experimental program at the Electron-Ion Collider (EIC). The EIC …

The strong force which binds hadrons is described by the theory of quantum
chromodynamics (QCD). Determining the character and manifestations of QCD is one of the …

This handbook provides a comprehensive review of transverse-momentum-dependent
parton distribution functions and fragmentation functions, commonly referred to as …

This work presents the first lattice-QCD calculation of the twist-3 axialquark generalized
parton distributions (GPDs) for the proton using the large-momentum effective theory …

We outline the physics opportunities provided by the Electron Ion Collider (EIC). These
include the study of the parton structure of the nucleon and nuclei, the onset of gluon …

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 …

We investigate the spin-orbital angular momentum correlations for the active quark inside
the light and heavy mesons for both the spin-0 and spin-1 cases. These correlations can be …

Generalized transverse momentum dependent parton distributions (GTMDs) are the most
general parton correlation functions of hadrons. By considering the exclusive double Drell …