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Partonic calculation of γ Z Exchange Corrections to Parity-Violating Elastic Electron-Proton Scattering
classification
⚛️ nucl-th
hep-ph
keywords
exchangegammascatteringcorrectionselasticelectron-protonparity-violatingparton
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We calculate $\gamma Z$ exchange corrections to the parity-violating asymmetry of the elastic electron-proton scattering in a parton model using the formalism of generalized parton distributions(GPDs). We also examine the validity of the zero-momentum-transfer approximation adopted in the literatures and find that it overestimates the $\gamma Z$ exchange effect significantly at the forward scattering angles.
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Forward citations
Cited by 1 Pith paper
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$\gamma Z$-exchange contribution in elastic $ep$ scattering by perturbative QCD
pQCD calculation of γZ-exchange amplitudes in elastic ep scattering demonstrates that the usual dispersion relation for the axial-vector part is invalid at high Q² and requires a once-subtracted form.
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