CP-odd violating anomalous top-quark couplings at D0

We conduct the first study of the T-odd correlations in $t\bar{t}$ events produced in $p\bar{p}$ collision at the Fermilab Tevatron collider that can be used to search for CP violation. We select events which have lepton+jets final states to identify $t\bar{t}$ events and measure asymmetries of several physics observables. Based on the results, we examine possible top quark anomalous couplings at the production vertex and estimate limits on the chromo-electric dipole moment of the top quark.