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We discuss the influence of anomalous tbar-t-G couplings on total anddifferential tbar-t production cross sections in hadron-hadron collisions. Westudy in detail the effects of a chromoelectric and a chromomagnetic dipolemoment, d' and \mu', of the top quark. In the d'-\mu' plane, we find a wholeregion where the anomalous couplings give a zero net contribution to the totaltop production rate. In differential cross sections, the anomalous moments haveto be quite sizable to give measurable effects. We estimate the values of d'and \mu' which are allowed by the present Tevatron experimental results on topproduction. A chromoelectric dipole moment of the top violates CP invariance.We discuss a simple CP-odd observable which allows for a direct search for CPviolation in top production.Comment: footnote pg. 4 changed, acknowledgments extende

Top-quark production in hadron-hadron collisions and anomalous top-quark–gluon couplings