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 …

A bstract We consider semi-inclusive deep inelastic scattering (SIDIS) and Drell-Yan events
within transverse momentum dependent (TMD) factorization. Based on the simultaneous fit …

HERAFitter is an open-source package that provides a framework for the determination of
the parton distribution functions (PDFs) of the proton and for many different kinds of analyses …

The physics programme and the design are described of a new collider for particle and
nuclear physics, the Large Hadron Electron Collider (LHeC), in which a newly built electron …

We provide a concise overview on transverse momentum dependent (TMD) parton
distribution functions, their application to topical issues in high-energy physics …

A bstract We present an extraction of unpolarized partonic transverse momentum
distributions (TMDs) from a simultaneous fit of available data measured in semi-inclusive …

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 …

A bstract Many observables in QCD rely upon the resummation of perturbation theory to
retain predictive power. Resummation follows after one factorizes the cross section into the …

After an introduction motivating the study of quarkonium production, we review the recent
developments in the phenomenology of quarkonium production in inclusive scatterings of …