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Radiative corrections to polarization observables for elastic $e+A$-scattering. Part I: Virtual Compton Scattering

M. P. Rekalo·E. Tomasi-Gustafsson
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Abstract

We calculate polarization phenomena for virtual Compton scattering on protons, at relatively large momentum transfer 1 GeV$^2$ $\le -q^2\le$ 5 GeV$^2$ on the basis of a model for $γ^*+ p\to γ+p$ with two main contributions: $π^0$-exchange in $t-$channel and $Δ$-excitation in $s$-channel. This model applies from threshold to $Δ$ region. The parameters entering in this model, such as coupling constants and electromagnetic form factors are well known. The analyzing powers for $γ^*+\vec p\to γ+ p$ and the components of the final proton polarization in $γ^*+ p\to γ+ \vec p$ are large in absolute value and show strong sensitivity to $π\bigotimesΔ$ interference. These results can be applied to the calculation of radiative corrections to polarization phenomena in elastic $ep$-scattering.

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M. P. Rekalo, E. Tomasi-Gustafsson. 2001-05-02. Radiative corrections to polarization observables for elastic $e+A$-scattering. Part I: Virtual Compton Scattering. https://arxiv.org/abs/nucl-th/0105002

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