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 review recent theoretical and experimental progress on the role of two-photon exchange
(TPE) in electron–proton scattering at low to moderate momentum transfers. We make a …

We determine the nucleon electromagnetic form factors and their uncertainties from world
electron scattering data. The analysis incorporates two-photon exchange corrections …

We extract the individual contributions from u and d quarks to the Dirac and Pauli form
factors of the proton, after a critical examination of the available measurements of …

The ratio of the elastic e+ p to ep scattering cross sections has been measured precisely,
allowing the determination of the two-photon exchange contribution to these processes. This …

Background: The electromagnetic form factors of the proton measured by unpolarized and
polarized electron scattering experiments show a significant disagreement that grows with …

We apply a subtracted dispersion relation formalism with the aim to improve predictions for
the two-photon exchange corrections to elastic electron-proton scattering observables at …

We present new precision measurements of the elastic electron-proton scattering cross
section for momentum transfer (Q 2) up to 15.75 (GeV/c) 2. Combined with existing data …

Background: The spatial distribution of charge and magnetization in the proton and neutron
are encoded in the nucleon electromagnetic form factors. The form factors are all …

A bstract We calculate the two-photon exchange (TPE) corrections in the region where the
kinematical variables describing the elastic ep scattering are moderately large momentum …