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 …

This article reviews our present understanding of QCD spin physics: the proton spin puzzle
and new developments aimed at understanding the transverse structure of the nucleon …

Abstract The CEBAF Large Acceptance Spectrometer for operation at 12 GeV beam energy
(CLAS12) in Hall B at Jefferson Laboratory is used to study electro-induced nuclear and …

The general question, crucial to an understanding of the internal structure of the nucleon, of
how to split the total angular momentum of a photon or gluon into spin and orbital …

The last five years have brought considerable progress in the study of the bound-state
problem in continuum quantum field theory. We highlight a subset of that progress; viz., that …

We study the Wigner functions of the nucleon which provide multidimensional images of the
quark distributions in phase space. These functions can be obtained through a Fourier …

We report the first measurement of target single spin asymmetries in the semi-inclusive He 3
(e, e′ π±) X reaction on a transversely polarized target. The experiment, conducted at …

Nucleons (protons and neutrons) are the building blocks of atomic nuclei and are
responsible for more than 99% of the visible matter in the Universe. Despite decades of …

We present a comprehensive new global QCD analysis of polarized inclusive deep-inelastic
scattering, including the latest high-precision data on longitudinal and transverse …

The nucleon structure functions probed in deep-inelastic scattering at large virtualities form
an important tool to test Quantum Chromodynamics (QCD) through precision measurements …