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

摘要

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 flavorviolation at the Large Hadron Collider (LHC), in which the nonuniversalcouplings between fermions and KK gauge bosons will lead to observable treelevel flavor-changing neutral current (FCNC) effects. We find that thesame-sign top quarks produced in our case have property of high energy and hightransverse momentum, and lead to an observable signal in the same-sign dileptonchannel even when the mass of the KK gluon reach up to 3 TeV. We furtherinvestigate the potential of the LHC to probe the flavor violating parametersand find that the LHC can probe their values down to 0.06.