Top-quark-charm-quark strong flavor-changing neutral currents at the Fermilab Tevatron

The possibility of an anomalous coupling between the top and charm quarks and the gluon field is explored in a model-independent way using an effective Lagrangian that is gauge invariant under a nonlinear realization of SU(3)(C)x SU(2)(L)xU(1)(Y). Even for the current 200 pb(-1) of integrated luminosity at the Fermilab Tevatron, the new physics scale that strongly modifies the coupling of t-c-g must be larger than about 2.5 TeV if no signal is found within a 3 sigma confidence limit. For 1 fb(-1) of data, this constraint can be pushed up to 3.8 TeV.