Radiative Corrections to the Azimuthal Asymmetry in Transversely Polarized Moller Scattering

Abstract

Experiment E158 at SLAC can measure an azimuthal asymmetry in single-spin, transversely polarized Moller scattering, e^{-\uparrow} e^- -> e^- e^-, which arises from a QED rescattering phase. We recompute the leading-order (one-loop) asymmetry, confirming previous results, and calculate the leading logarithmic QED corrections due to initial-state radiation from the beam and target electrons, and due to final-state radiation. The size of these radiative corrections is quite sensitive to experimental details, such as the acceptance in energy and in polar angle of the scattered electron. For E158, the corrections are modest, increasing the parts-per-million asymmetry by roughly 1 percent.

arXiv comment8 pages, 3 figures, 2 tables. v2: overall sign of leading-order asymmetry corrected

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Cited by in corpus (5)

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• The two-photon exchange contribution to elastic electron-nucleon scattering at large momentum transfer
• Two-photon exchange in elastic electron-proton scattering
• Measurement of the Transverse Beam Spin Asymmetry in Elastic Electron Proton Scattering and the Inelastic Contribution to the Imaginary Part of the Two-Photon Exchange Amplitude
• Large Logarithms in the Beam Normal Spin Asymmetry of Elastic Electron--Proton Scattering