We review the role of two-photon exchange (TPE) in electron–hadron scattering, focusing in
particular on hadronic frameworks suitable for describing the low and moderate Q2 region …

This paper describes a precise measurement of electron scattering off the proton at
momentum transfers of 0.003≲ Q 2≲ 1 GeV 2. The average point-to-point error of the cross …

The OLYMPUS Collaboration reports on a precision measurement of the positron-proton to
electron-proton elastic cross section ratio, R 2 γ, a direct measure of the contribution of hard …

Electromagnetic form factors of proton and neutron, obtained from a new fit of data, are
presented. The proton form factors are obtained from a simultaneous fit to the ratio μ p G …

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 …

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 …

The OLYMPUS experiment was designed to measure the ratio between the positron–proton
and electron–proton elastic scattering cross-sections, with the goal of determining the …

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 …

We extract the two-photon exchange (TPE) contributions to electron-proton elastic scattering
using two parametrizations and compare the results to different phenomenological …

Background: The spatial distribution of charge and magnetization within the proton is
encoded in the elastic form factors. These have been precisely measured in elastic electron …