  The recent proposal [1911.06318, 2010.07861] of implementing
electric-magnetic duality rotation at the level of perturbative scattering
amplitudes and its generalisation to gravitational context where usual
gravitational mass is rotated to the NUT parameter of the Taub-NUT spacetime
opens up an interesting avenue for studying NUT-charged objects as dynamical
entities, in contrast to the usual approach where NUT-charged objects are
considered as a static background. We extend the tree-order analysis to
one-loop order and find a disagreement between geodesic motion on Taub-NUT
background and impulse computation of scattering amplitudes. As a by-product of
our analysis, we find a relation between tidal response parameters and
resonance excitation parameters in the language of quantum field theory
scattering amplitudes.
