Single top quark production via FCNC couplings at hadron colliders

We calculate single top-quark production at hadron colliders via the chromo-magnetic flavor-changing neutral current couplings $\overline{t}\mathrm{cg}$ and $\overline{t}\mathrm{ug}.\mathrm{}$ We find that the strength for the anomalous $\overline{t}cg\left(\overline{t}ug\right)$ coupling may be probed to ${\kappa }_c/\Lambda =0.092\mathrm{}{\mathrm{TeV}}^{\mathrm{-}1}$ $({\kappa }_u/\Lambda =0.026\mathrm{}{\mathrm{TeV}}^{\mathrm{-}1})$ at the Fermilab Tevatron with $2{\mathrm{fb}}^{\mathrm{-}1}$ of data and ${\kappa }_c/\Lambda =0.013\mathrm{}{\mathrm{TeV}}^{\mathrm{-}1}$ $({\kappa }_u/\Lambda =0.0061\mathrm{}{\mathrm{TeV}}^{\mathrm{-}1})$ at the CERN LHC with $10{\mathrm{fb}}^{\mathrm{-}1}$ of data. The two couplings may be distinguished by a comparison of the single top signal with the direct top and top decay signals for these couplings.