SINGLE TOP-QUARK PRODUCTION AS A PROBE FOR ANOMALOUS MOMENTS AT HADRON COLLIDERS

Single production of top quarks at hadron colliders via gW fusion is e xamined as a probe of possible anomalous chromomagnetic and/or chromoe lectric moment type couplings between the top quark and gluons. We fin d that this channel is far less sensitive to the existence of anomalou s couplings of this kind than is the usual production of top quark pai rs by gg or q (q) over bar fusion, The contribution to the cross secti on and various kinematical distributions from anomalous couplings with interesting magnitudes is essentially hidden by the present theoretic al uncertainties in the calculation. This result is found to hold at b oth the Fermilab Tevatron as well as the CERN LHC, although somewhat g reater sensitivity for anomalous couplings in this channel is found at the higher energy machine.