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 …

This is a review of hadron structure physics from lattice QCD. Throughout this report, we
place emphasis on the contribution of lattice results to our understanding of a number of …

Precise measurements of the spin structure functions of the proton g 1 p (x, Q 2) and
deuteron g 1 d (x, Q 2) are presented over the kinematic range 0.0041≤ x≤ 0.9 and 0.18 …

We present a measurement of the deuteron spin-dependent structure function g1d based on
the data collected by the COMPASS experiment at CERN during the years 2002–2004. The …

We present a new analysis of the helicity parton distributions of the nucleon. The analysis
takes into account the available data from inclusive and semi-inclusive polarized deep …

Fragmentation functions and their uncertainties are determined for pion, kaon, and proton by
a global χ 2 analysis of charged-hadron production data in electron-positron annihilation …

A bstract We revisit the problem of the small Bjorken-x asymptotics of the quark and gluon
orbital angular momentum (OAM) distributions in the proton utilizing the revised small-x …

We analyze the world polarized deep-inelastic scattering (DIS) and semi-inclusive DIS
(SIDIS) data at low values of x< 0.1, using small-x evolution equations for the flavor singlet …

After the initial discovery of the so-called “spin crisis in the parton model” in the 1980s, a
large set of polarization data in deep inelastic lepton–nucleon scattering was collected at …

We set conservative constraints on decaying dark matter particles with masses spanning a
very wide range (10 4− 10 16 GeV). For this we use multimessenger observations of cosmic …