Kaluza–Klein gluon and b-jet forward–backward asymmetry

AbstractThe forward–backward asymmetry of b-quark jets on the Z-pole measured at LEP/SLD experiments shows us −2.8-σ deviation from the Standard Model (SM) prediction. We examine a possibility of Kaluza–Klein (KK) gluon to explain the AFBb data in a scenario based on the warped extra dimension model by Randall and Sundrum. In this scenario, the KK gluon strongly couples to b-quark by an appropriate choice of the bulk quark mass terms. We find that the AFBb data could be explained if the KK gluon mass is few hundred GeV. Constraints on our scenario from the hadron collider experiments are discussed