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

TL;DR

This paper investigates the production of same-sign top pairs mediated by KK gluons in a Randall-Sundrum model with flavor violation, showing potential for observable signals at the LHC even for heavy KK gluons.

Contribution

It introduces a novel analysis of same-sign top production via KK gluons in a flavor-violating RS model, highlighting the LHC's ability to probe flavor-violating parameters.

Findings

High energy, high transverse momentum top pairs produce observable signals.

LHC can detect flavor-violating parameters down to 0.06.

KK gluons with mass up to 3 TeV can be probed.

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.