2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/207550We give a compact expression for the unpolarised differential cross section for muon-proton scattering in the one photon exchange approximation. The effect of adding the vacuum polarisation amplitude to the no-spin-flip amplitude for one photon exchange is calculated at small energies and scattering angles and is found to be negligible for present experiments.6 pages, one figureHigh Energy Physics - Phenomenologytext