Two-photon exchange and polarization physics in electron-proton scattering
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We discuss effects of two-photon exchange (TPE) in various observables of the elastic ep-scattering. The imaginary part of the TPE amplitude manifests in target and beam normal spin asymmetries. The real part contributes to the cross-section. A model-independent phenomenological analysis of experimental data is performed. Its results are compared with theoretical calculations.
Talk given at Baldin ISHEPP XIX, Dubna, September 29 - October 4, 2008
Talk given at Baldin ISHEPP XIX, Dubna, September 29 - October 4, 2008