  An influence of the anomalous Wtb coupling on forward-backward asymmetry of
top quark pair production at the Tevatron is investigated taking into account
decays of the top quarks to 6 fermion final states containing one charged
lepton. To this end the most general effective Lagrangian of the Wtb
interaction containing terms of dimension up to five is implemented into
'carlomat', a general purpose Monte Carlo program, which allows to compute
automatically all necessary cross sections in the presence of anomalous vector
and tensor form factors. A sample of results which illustrate little effect of
the left- and right-handed tensor form factors on the t\bar t invariant mass
dependent forward-backward asymmetry and the charge-signed rapidity
distribution of the lepton originating from the W boson from top quark decay is
shown.
