We review the present understanding of the spin structure of protons and neutrons, the
fundamental building blocks of nuclei collectively known as nucleons. The field of nucleon …

We review the current state of knowledge of the nucleon polarizabilities and of their role in
nucleon Compton scattering and in hydrogen spectrum. We discuss the basic concepts, the …

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 …

Measuring the spin structure of protons and neutrons tests our understanding of how they
arise from quarks and gluons, the fundamental building blocks of nuclear matter. At long …

The ongoing experimental efforts to measure the hyperfine transition in muonic hydrogen
prompt an accurate evaluation of the proton-structure effects. At the leading order in α, which …

We present the results of our final analysis of the full data set of g 1 p (Q 2), the spin structure
function of the proton, collected using CLAS at Jefferson Laboratory in 2000–2001 …

Understanding the nucleon spin structure in the regime where the strong interaction
becomes truly strong poses a challenge to both experiment and theory. At energy scales …

We present the final results for the deuteron spin structure functions obtained from the full
data set collected in 2000–2001 with Jefferson Lab's continuous electron beam accelerator …

We examine the polarized doubly-virtual Compton scattering (VVCS) off the nucleon using
chiral perturbation theory (χ PT). The polarized VVCS contains a wealth of information on the …

Experimental data obtained for the polarized Bjorken sum rule (BSR) Γ _1^ pn (Q^ 2) Γ 1 pn
(Q 2) are fitted by using predictions derived within a truncated operator product expansion …