Spectra, triple and quartic gauge couplings in a Higgsless model

TL;DR

This paper investigates the spectra and gauge couplings in a Higgsless model with warped space, revealing significant deviations from the Standard Model and implications for collider detection.

Contribution

It extends the formalism for multi-gauge-boson vertices in a Higgsless model and analyzes how parameters affect spectra and couplings.

Findings

Mass spectra are highly sensitive to QCD power correction parameters.

Triple and quartic gauge couplings can deviate by at least ±10% from Standard Model values.

Certain gauge couplings can be significantly smaller than unitarity bounds, affecting detection prospects at LHC.

Abstract

Spectra, triple and quartic gauge couplings of the Higgsless model with gauge group $SU(2)_L\times SU(2)_R\times U(1)_{B-L}$ defined in warped space are explored with numerical method. We extend the equation of motions, boundary conditions and formalism of multi-gauge-boson vertices to the Hirn-Sanz scenario. By assuming the ideally delocalized fermion profile, we study the spectra of vector bosons as well as the triple and quartic gauge couplings among vector bosons. It is found that mass spectra can be greatly modified by the parameters of QCD power corrections. Meanwhile, the triple and quartic gauge couplings can deviate from the values of the standard model to at least $\pm 10%$ and can saturate the LEP2 bounds. We find the triple gauge couplings of $Z{\bar W}W$ can be $ 50 %$ smaller than the unitarity bounds. While the triple gauge couplings of ${\bar Z}WW$ is 20% smaller than the unitarity bounds, which might challenge the detection of ${\bar Z}$ via s channel at LHC if $m_{\bar Z}> 500$ GeV.