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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
; | | Date: |
2 May 2001 | | Subject: | nucl-th | | Abstract: | We calculate polarization phenomena for virtual Compton scattering on protons, at relatively large momentum transfer 1 GeV$^2$ $le -q^2le$ 5 GeV$^2$ on the basis of a model for $gamma^*+ p o gamma+p$ with two main contributions: $pi^0$-exchange in $t-$channel and $Delta$-excitation in $s$-channel. This model applies from threshold to $Delta$ region. The parameters entering in this model, such as coupling constants and electromagnetic form factors are well known. The analyzing powers for $gamma^*+vec p o gamma+ p$ and the components of the final proton polarization in $gamma^*+ p o gamma+ vec p$ are large in absolute value and show strong sensitivity to $piigotimesDelta$ interference. These results can be applied to the calculation of radiative corrections to polarization phenomena in elastic $ep$-scattering. | | Source: | arXiv, nucl-th/0105002 | | Services: | Forum | Review | PDF | Favorites | |
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