Distributions of three important discriminating variables (except for the transverse momentum of the lepton):
a,
d the top-quark transverse mass in the control and signal regions;
b,
e the



between the lepton and the reconstructed top quark in the control and signal regions;
c,
f the



between the jet and the reconstructed top quark. All processes are normalised using the scale factors obtained in the binned maximum-likelihood fit to the



distribution. The FCNC signal cross-section is scaled to 50 pb and overlayed on the distributions in the signal region. The last histogram bin includes overflow events and the
hatched band indicates the combined statistical and systematic uncertainties, evaluated after the fit discussed in Sect.