The generalized parton distributions, introduced nearly a decade ago, have emerged as a
universal tool to describe hadrons in terms of quark and gluonic degrees of freedom. They …

We review the spectrum and electromagnetic properties of baryons described as relativistic
three-quark bound states within QCD. The composite nature of baryons results in a rich …

The proton size, specifically its charge radius, was thought known to about 1% accuracy.
Now a new method probing the proton with muons instead of electrons finds a radius about …

There has been much activity in the measurement of the elastic electromagnetic proton and
neutron form factors in the last decade, and the quality of the data has been greatly …

Precise proton and neutron form factor measurements at Jefferson Lab, using spin
observables, have recently made a significant contribution to the unraveling of the internal …

We use the world's data on elastic electron-proton scattering and calculations of two-photon
exchange effects to extract corrected values of the proton's electric and magnetic form …

We review the description of the lowest-energy nucleon excitation—the Δ (1232)-resonance.
Much of the recent experimental effort has been focused on the precision measurements of …

The aim of this report is to give basic notions on electromagnetic hadron form factors (FFs),
as they are understood at the present time, to summarize and analyze the present …

We report a new, high-precision measurement of the proton elastic form factor ratio
μpGE/GM for the four-momentum transfer squared Q2= 0.3–0.7 (GeV/c) 2. The measurement …

Precise measurements of the proton electromagnetic form factor ratio R= μ p GE p/GM p
using the polarization transfer method at Jefferson Lab have revolutionized the …