Two-photon exchange corrections in elastic muon-proton scattering

Abstract

We extend the general formalism of two-photon exchange to elastic lepton-nucleon scattering by accounting for all lepton mass terms. We then perform a numerical estimate of the muon-proton scattering at low momentum transfer in view of the future MUSE experiment. For this purpose, we estimate the two-photon exchange corrections to muon-proton scattering observables by considering the contribution of the proton intermediate state, which is expected to dominate at very low momentum transfers. We find that the two-photon exchange effect to the unpolarized muon- proton scattering cross section in the MUSE kinematical region is of the order of 0.5%.

13 pages, 7 figures, version published in Phys. Rev. D 90, 013006 (2014)

References in corpus (2)

• High-precision determination of the electric and magnetic form factors of the proton
• Two-photon exchange in dispersion approach

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