Dispersion relation formalism for the two-photon exchange correction to elastic muon-proton scattering: elastic intermediate state
High Energy Physics - Phenomenology
2024-10-28 v3 Nuclear Experiment
Nuclear Theory
Abstract
We evaluate the two-photon exchange correction to the unpolarized cross section in the elastic muon-proton scattering within dispersion relations. One of the six independent invariant amplitudes requires a subtraction. We fix the subtraction function to the model estimate of the full two-photon exchange at one of three MUSE beam energies and make a prediction for the two other energies. Additionally, we present single and double polarization observables accounting for the lepton mass.
Keywords
Cite
@article{arxiv.1803.05349,
title = {Dispersion relation formalism for the two-photon exchange correction to elastic muon-proton scattering: elastic intermediate state},
author = {Oleksandr Tomalak and Marc Vanderhaeghen},
journal= {arXiv preprint arXiv:1803.05349},
year = {2024}
}
Comments
16 pages, 9 figures, version published in Eur. Phys. J. C, 78 6 (2018) 514