Study of Two-Photon Corrections in the $p\bar{p}-->e+e-$ Process: Hard Rescattering Mechanism

Abstract

We investigate the two-photon corrections to the process $p\bar{p}\to e^{+}{e}^{-}$ 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 $p\bar{p}\to e^{+}{e}^{-}$ cross sections in the momentum transfer range 5 - 30 GeV${}^2$ is below the 1 % level.

References in corpus (10)

• Nucleon Electromagnetic Form Factors
• Global analysis of proton elastic form factor data with two-photon exchange corrections
• Recoil Polarization Measurements of the Proton Electromagnetic Form Factor Ratio to Q^2 = 8.5 GeV^2
• Nucleon electromagnetic form factors
• Nucleon Form Factors in QCD
• Two-Photon Physics in Hadronic Processes
• Search for effects beyond the Born approximation in polarization transfer observables in $\vec{e}p$ elastic scattering
• Two-photon exchange in elastic electron-proton scattering : QCD factorization approach
• Perturbative QCD predictions for two-photon exchange
• Nucleon distribution amplitudes from lattice QCD

Cited by in corpus (4)

• Proton-antiproton annihilation into massive leptons
• Polarized e-p Elastic Scattering in the Collider Frame
• Resonances contribution to two-photon exchange effects and possible large forward-backward asymmetry in $e^{+}{e}^{-}\to p\bar{p}$
• Radiative corrections in nucleon time-like form factors measurements