Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2000-01-12
Phys.Rev. C62 (2000) 025501
Physics
High Energy Physics
High Energy Physics - Phenomenology
74 pages, 19 figures
Scientific paper
10.1103/PhysRevC.62.025501
The QED radiative corrections to virtual Compton scattering (reaction $e p \to e p \gamma$) are calculated to first order in $\alpha_{em} \equiv e^2 / 4 \pi$. A detailed study is presented for the one-loop virtual corrections and for the first order soft-photon emission contributions. Furthermore, a full numerical calculation is given for the radiative tail, corresponding with photon emission processes, where the photon energy is not very small compared with the lepton momenta. We compare our results with existing works on elastic electron-proton scattering, and show for the $e p \to e p \gamma$ reaction how the observables are modified due to these first order QED radiative corrections. We show results for both unpolarized and polarized observables of the virtual Compton scattering in the low energy region (where one is sensitive to the generalized polarizabilities of the nucleon), as well as for the deeply virtual Compton scattering.
de Wiele van J.
Friedrich Jan M.
Hoorebeke Van L.
Lhuillier Daniel
Marchand Didier
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