Study of Two-Photon Corrections in the pp --> e+e- Process: Hard Rescattering Mechanism
Abstract
We investigate the two-photon corrections to the process pp e+e- at large momentum transfer, aimed to access the time-like nucleon form factors. We estimate the two-photon corrections using a hard rescattering mechanism, which has already been used to calculate the corresponding corrections to elastic electron-proton scattering. Using different nucleon distribution amplitudes, we find that the two-photon corrections to the pp e+e- cross sections in the momentum transfer range 5 - 30 GeV2 is below the 1 % level.
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