Lepton scattering is an established ideal tool for studying inner structure of small particles
such as nucleons as well as nuclei. As a future high energy nuclear physics project, an …

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 …

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 …

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 …

The COMPASS Collaboration at CERN has measured the transverse spin azimuthal
asymmetry of charged hadrons produced in semi-inclusive deep inelastic scattering using a …

Single-spin asymmetries for pions and charged kaons are measured in semi-inclusive deep-
inelastic scattering of positrons and electrons off a transversely nuclear-polarized hydrogen …

Measurements of the Collins and Sivers asymmetries for charged pions and charged and
neutral kaons produced in semi-inclusive deep-inelastic scattering of high energy muons off …

Differential production cross sections of prompt J/ψ and ψ (2S) charmonium and ϒ (nS)(n=
1, 2, 3) bottomonium states are measured in proton–proton collisions at s= 13 TeV, with data …

Extensive experimental and theoretical explorations over the last decades showed that the
nucleon (proton/neutron) is not just a simple system of 3 quarks bound by gluons, but a …