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 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 …

The field of fragmentation functions of light quarks and gluons is reviewed. In addition to
integrated fragmentation functions, attention is paid to the dependence of fragmentation …

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

We review the present state of knowledge regarding the transverse polarisation (or
transversity) distributions of quarks. After some generalities on transverse polarisation, we …

This report is based on a ten-week program on" Gluons and the quark sea at high-energies",
which took place at the Institute for Nuclear Theory in Seattle in Fall 2010. The principal aim …

We present the first extraction of the transversity distribution in the framework of collinear
factorization based on the global analysis of pion-pair production in deep-inelastic scattering …

The topical workshop Strong QCD from Hadron Structure Experiments took place at
Jefferson Lab from November 6–9, 2019. Impressive progress in relating hadron structure …

The state of the art concerning transverse-spin and transverse-momentum phenomena in
hard hadronic reactions is reviewed. An account is given of single-spin and azimuthal …