Charge asymmetry in elastic scattering of massive leptons on protons

Abstract

The charge asymmetry due to higher-order QED corrections in elastic lepton-proton scattering is estimated without employing the ultrarelativistic approximation. Our calculation is performed by generalizing the soft-photon approximation approach suggested by Tsai. Corresponding loop integrals that take a form of Passarino-Veltman scalar three-point functions are calculated analytically without neglecting the mass of the lepton. Our results provide model-independent charge asymmetry predictions for scattering of unpolarized and massive leptons on proton targets. These predictions can be used in corresponding experiments to determine the contribution coming from model-dependent hard two-photon exchange processes.

10 pages, 4 figures; minor changes, published version

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• Lepton-Proton Two-Photon Exchange in Chiral Perturbation Theory
• Target-normal single-spin asymmetry in elastic electron-nucleon scattering
• Beam-normal single-spin asymmetry in elastic scattering of electrons from a spin-0 nucleus
• Radiative and chiral corrections to elastic lepton-proton scattering in chiral perturbation theory
• Lepton mass effects for beam-normal single-spin asymmetry in elastic muon-proton scattering
• Radiative Correction to Lepton Proton Scatterings in Manifestly Lorentz-Invariant Chiral Perturbation Theory
• Instrumental uncertainties in radiative corrections for the MUSE experiment
• Charge and spin asymmetries in elastic lepton-nucleon scattering
• Contribution of hard photon emission to charge asymmetry in elastic (anti)lepton-proton scattering
• CFNS Ad-Hoc meeting on Radiative Corrections Whitepaper