Phenomenological analysis of two-photon exchange effects in proton form factor measurements

Abstract

We perform a model-independent phenomenological analysis of experimental data on proton form factors ratio. We find that only one of the two photon exchange amplitudes, which we call $\delta G_M$, is responsible for the discrepancy between Rosenbluth and polarization methods. The linearity of Rosenbluth plots implies that $\delta G_M$ is approximately linear function of $\epsilon$. The slope of $\delta G_M$ is extracted from experimental data and is shown to be consistent with theoretical calculations.

4 pages, 3 figures, version accepted in Phys.Rev.C

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• Box diagram in the elastic electron-proton scattering
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• Reliability Analysis of the Results of the Known Experiments on Measuring of the Sachs Form Factor Ratio Using the Rosenbluth Technique. Polarization of the Final Proton in the $e\vec{p}\to e\vec{p}$ Elastic Process
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• Exact Relations for Two-Photon-Exchange Effect in Elastic $ep$ Scattering by Dispersion Relation and Hadronic Model