Abstract
We present a search for flavor changing neutral currents in decays of top quarks. The analysis is based on a search for ( ℓ , ℓ ′ = e , μ ) final states using 4.1 fb −1 of integrated luminosity of collisions at . We extract limits on the branching ratio B ( t → Z q ) ( q = u , c quarks), assuming anomalous tuZ or tcZ couplings. We do not observe any sign of such anomalous coupling and set a limit of B <3.2% at 95% C.L.
