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    Nucleon Compton Scattering with Two Space-Like Photons

    We calculate two-photon exchange effects for elastic electron-proton scattering at high momentum transfers. The corresponding nucleon Compton amplitude is defined by two space-like virtual photons that appear to have significant virtualities. We make predictions for a) a single-spin beam asymmetry, and b) a single-spin target asymmetry or recoil proton polarization caused by an unpolarized electron beam.

    Authors: Andrei Afanasev, I. Akushevich, N.P. Merenkov



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