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

preprint2016arXivOpen access

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.

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