Target Normal Spin Asymmetry of the Elastic ep-Scattering at Resonance Energy
Dmitry Borisyuk, Alexander Kobushkin
Abstract
We study the target normal spin asymmetry for the reaction ep ep at electron energy up to few GeV in the laboratory frame. The asymmetry is proportional to the imaginary part of the reaction scattering amplitude. To estimate the imaginary part of the amplitude we use the unitarity relation and saturate the intermediate hadron states by the proton and resonances from the first, second and third resonance regions. The resonance electromagnetic transition amplitudes, needed to evaluate the asymmetry, are taken from experiment.
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