Implications of the effective axial-vector coupling of the gluon on top-quark charge asymmetry at the LHC

We study different top-quark charge asymmetries and the variation of t (t) over bar t total cross section induced by the effective axial-vector coupling of gluon in the LHC experiments. We show that rapidity-cut-dependent asymmetries are more sensitive to the new physics than the independent ones. We also study the dependence of the asymmetries and variations of total t (t) over bar t cross sections on the invariant mass of t (t) over bar t system and show that it would be necessary to measure those quantities as functions of m(tt) at the LHC. In the context of considered new physics scenario, 7 TeV LHC has enough sensitivity either to confirm the Tevatron top asymmetry anomaly or to rule it out. In the latter case, the LHC is able to put stringent constraints on the new physics scale Lambda in this framework.