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arXiv · 1405.1600

Two-photon exchange corrections in elastic muon-proton scattering

O. Tomalak·M. Vanderhaeghen
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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%.

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O. Tomalak, M. Vanderhaeghen. 2014-07-14. Two-photon exchange corrections in elastic muon-proton scattering. https://doi.org/10.1103/physrevd.90.013006

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