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We present measurements of the forward-backward asymmetry in the angulardistribution of leptons from decays of top quarks and antiquarks produced inproton-antiproton collisions. We consider the final state containing a leptonand at least three jets. The entire sample of data collected by the D0experiment during Run II of the Fermilab Tevatron Collider, corresponding to9.7 inverse fb of integrated luminosity, is used. The asymmetry measured forreconstructed leptons is $A_{FB}^l = \big(2.9 \pm 2.1(stat.)^{+1.5}_{-1.7}(syst.) \big)$%. When corrected for efficiency and resolutioneffects within the lepton rapidity coverage of $|y_l|<1.5$, the asymmetry isfound to be $A_{FB}^l = \big(4.2 \pm 2.3(stat.) ^{+1.7}_{-2.0}(syst.) \big)$%.Combination with the asymmetry measured in the dilepton final state yields$A_{FB}^l = \big(4.2 \pm 2.0(stat.) \pm 1.4(syst.) \big)$%. We examine thedependence of $A_{FB}^l$ on the transverse momentum and rapidity of the lepton.The results are in agreement with predictions from the next-to-leading-orderQCD generator \mcatnlo, which predicts an asymmetry of $A_{FB}^l = 2.0$% for$|y_l|<1.5$.

Measurement of the forward-backward asymmetry in the distribution of leptons in $t\bar{t}$ events in the lepton+jets channel