Nucleon Compton Scattering with Two Space--Like Photons

Abstract

We calculated 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.

9 pages, 4 figures, requires ws-procs9x6 (enclosed), Talk presented at the Workshop on Exclusive Processes at High Momentum Transfer, Jefferson Lab, Newport News, VA, May 15-18, 2002

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• Two-Photon Exchange in Electron-Proton Elastic Scattering: Theory Update
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