The sensitivity of particle-level fiducial cross section measurements
from ATLAS, CMS and LHCb to a leptophobic top-colour model is studied.
The model has previously been the subject of resonance searches. Here we
compare it directly to state-of-the-art predictions for Standard Model
top quark production and also take into account next-to-leading order
predictions for the new physics signal. We make use of the Contur
framework to evaluate the sensitivity of the current measurements, first
under the default Contur assumption that the measurement and the SM
exactly coincide, and then using the full SM theory calculation for t ¯t
at next-to-leading and next-to-next-to-leading order as the background
model. We derive exclusion limits, discuss the differences between these
approaches, and compare to the limits from resonance searches by ATLAS
and CMS.