Like-sign Di-lepton Signals in Higgsless Models at the LHC

TL;DR

This paper investigates the potential for discovering the Z1 KK gauge boson in Higgsless models at the LHC through like-sign dilepton signals, proposing specific production and decay channels to identify the resonance.

Contribution

It introduces a novel search strategy for Z1 in Higgsless models using like-sign dileptons and associated production at the LHC, estimating discovery reach.

Findings

Z1 can be observed at 5 sigma with 100 fb^-1 for masses up to 650 GeV (WW channel)

Detection is feasible up to 560 GeV for the ttbar decay mode

Proposes specific final states and analysis methods for experimental searches

Abstract

We study the potential LHC discovery of the Z1 KK gauge boson unitarizing longitudinal W+W- scattering amplitude. In particular, we explore the decay mode Z1->t tbar along with Z1-> W+W- without specifying the branching fractions. We propose to exploit the associated production pp-> W Z1, and select the final state of like-sign dileptons plus multijets and large missing energy. We conclude that it is possible to observe the Z1 resonance at a 5 sigma level with an integrated luminosity of 100 inverse fb at the LHC upto 650 GeV for a dominant WW channel, and 560 GeV for a dominant ttbar channel.