Abstract This White Paper presents an overview of the current status and future perspective
of QCD research, based on the community inputs and scientific conclusions from the 2022 …

We review some recent progress in the theory of electroweak radiative corrections in
semileptonic decay processes. The resurrection of the so-called Sirlin's representation …

The visible world is founded on the proton, the only composite building block of matter that is
stable in nature. Consequently, understanding the formation of matter relies on explaining …

A bstract We present the first and complete dispersion relation analysis of the inner radiative
corrections to the axial coupling constant g A in the neutron β-decay. Using experimental …

We present new data on the Bjorken sum Γ‾ 1 p− n (Q 2) at 4-momentum transfer 0.021≤ Q
2≤ 0.496 GeV 2. The data were obtained in two experiments performed at Jefferson Lab …

The QCD effective charge α g 1 (Q) is an observable that characterizes the magnitude of the
strong interaction. At high momentum Q, it coincides with the QCD running coupling α s (Q) …

Nucleon resonance contributions to the polarized proton g 1 and g 2 structure functions are
computed from resonance electroexcitation amplitudes extracted from CLAS exclusive …

The strong interaction is not well understood at low energies or for interactions with low
momentum transfer. Chiral perturbation theory gives testable predictions for the nucleonic …

Phenomenological amplitudes obtained in partial-wave analyses (PWA) of single-pion
photoproduction are used to evaluate the contribution of this process to the Gerasimov-Drell …

We use the known renormalon structure of Bjorken polarised sum rule (BSR) Γ‾ 1 p− n (Q 2)
to evaluate the leading-twist part of that quantity. In addition, we include D= 2 and D= 4 …