https://doi.org/10.1140/epjc/s10052-018-5988-5
Regular Article - Theoretical Physics
Dispersion relation formalism for the two-photon exchange correction to elastic muon–proton scattering: elastic intermediate state
Institut für Kernphysik and Cluster of Excellence PRISMA, Johannes Gutenberg Universität Mainz, 55128, Mainz, Germany
* e-mail: tomalak@uni-mainz.de
Received:
20
March
2018
Accepted:
11
June
2018
Published online:
21
June
2018
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.
© The Author(s), 2018
