Measurement of the charge asymmetry in $t\bar{t}$ production in proton-antiproton collision at D0

We report on the measurement of forward-backward asymmetry in $t\bar{t}$ production in proton-antiproton collisions. If the component of the top quark momentum along the proton direction is larger than that of antitop the asymmetry is defined as positive and negative otherwise. Top and and antitop momenta are reconstructed in lepton+jets sample using b-tagging information and kinematic constraints.