Same-sign top pair production in an extra-dimension model of flavor at the CERN Large Hadron Collider

Abstract

We study the same-sign top pair production mediated by the first Kluza-Klein (KK) excitation of the gluon in the Randall-Sundrum (RS) model with flavor violation at the Large Hadron Collider (LHC), in which the nonuniversal couplings between fermions and KK gauge bosons will lead to observable tree level flavor-changing neutral current (FCNC) effects. We find that the same-sign top quarks produced in our case have property of high energy and high transverse momentum, and lead to an observable signal in the same-sign dilepton channel even when the mass of the KK gluon reach up to 3 TeV. We further investigate the potential of the LHC to probe the flavor violating parameters and find that the LHC can probe their values down to 0.06.

12 pages, 4 figures; several references added; version appeared in Phys.Rev.D

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Cited by in corpus (5)

• Top Quark Forward-Backward Asymmetry and Same-Sign Top Quark Pairs
• Top-antitop and Top-top Resonances in the Dilepton Channel at the CERN LHC
• Covariant Description of Flavor Conversion in the LHC Era
• Covariant Description of Flavor Violation at the LHC
• Signature of same-sign top pair production mediated by a nonuniversal $Z^{\prime }$ with QCD next-to-leading accuracy at the LHC