Sherpa Romeo green journal. Permission to archive final published version.The amplitude for the scattering of a point magnetic monopole and a point charge, at center-of-
mass energies much larger than the masses of the particles, and in the limit of low momentum
transfer, is shown to be proportional to the (integer-valued) monopole strength, assuming the Dirac
quantization condition for the monopole-charge system. It is demonstrated that, for small momentum
transfer, charge-monopole electromagnetic effects remain comparable to those due to the
gravitational interaction between the particles even at Planckian center-of-mass energies.Ye
