Study the Forward-Backward Asymmetry of the Top Quark Production in the Randall-Sundrum Model with an Extension of Strong Interaction

Abstract

The large forward-backward asymmetry of the top quark pair production measured by the hadron colliders shed light on new physics signals beyond the Standard Model. In the Randall-Sundrum model with an additional SU(3) group in the strong sector, we compare the total cross section and forward-backward asymmetry of the top quark pair production with the newest data obtained by the CDF and the D0 collaborations. Our numerical analysis shows that the parameter $c_q\gtrsim 0.5$, $c_t\sim -0.6\sim -0.8$, $\tan \varphi \gtrsim 20$ or $\tan \varphi \le 1/20$ and the first excitation of axial gluon with a mass about $5\sim 6\mathrm{TeV}$ can accommodate this large anomaly without violating other experimental constraints.

Comments: 14 pages, 6 figures, accepted for publication in PRD