Partonic calculation of $γZ$ Exchange Corrections to Parity-Violating Elastic Electron-Proton Scattering

Details Partonic calculation of $γZ$ Exchange Corrections to Parity-Violating Elastic Electron-Proton Scattering Partonic calculation of $γZ$ Exchange Corrections to Parity-Violating Elastic Electron-Proton Scattering

2009-03-06

arxiv.org/abs/0903.1098v1

Physics

Nuclear Physics

Nuclear Theory

4pages, 5 figs

Scientific paper

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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