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

Understand

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.