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

Abstract

We study different top quark charge asymmetries and the variation of $t\bar{t}$ 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 $t\bar{t}$ cross sections on the invariant mass of $t\bar{t}$ 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 constraint on the new physics scale $\Lambda$ in this framework.

few small changes in the text, Fig. 2 corrected, same as published version, 12 pages, 9 figures

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• Interpretations and Implications of the Top Quark Rapidity Asymmetries $A_{FB}^t$ and $A_{FB}^{\ell }$
• Ultraviolet Completions of Axigluon Models and Their Phenomenological Consequences
• Implications of effective axial-vector coupling of gluon for $t\bar{t}$ spin polarizations at the LHC
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• Study the Forward-Backward Asymmetry of the Top Quark Production in the Randall-Sundrum Model with an Extension of Strong Interaction
• The chiral color symmetry of quarks and $G^{\prime }$-boson contributions to charge asymmetry in $t\bar{t}$-production at the LHC and Tevatron
• Measurements of the top-quark properties at CMS