Subtracted dispersion relation formalism for the two-photon exchange correction to elastic electron-proton scattering: comparison with data

Abstract

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 finite momentum transfers. We study the formalism on the elastic contribution, and make a detailed comparison with existing data for unpolarized cross sections as well as polarization transfer observables.

Comments: 49 pages, 26 figures, version published in Eur. Phys. J. A 51, no. 2, 24 (2015)