Drell-Yan production at the LHC in a four site Higgsless model

TL;DR

This paper analyzes a four site Higgsless model predicting new gauge bosons, assesses their detectability at the LHC, and finds they could be discovered early in the low-luminosity run.

Contribution

It introduces a four site Higgsless model with sizeable fermion-boson couplings and evaluates the potential for discovering new gauge bosons at the LHC.

Findings

Six new gauge bosons could be detected early at the LHC.

The model allows for sizeable fermion-boson couplings compatible with electroweak data.

Predicted particles are accessible via the Drell-Yan channel.

Abstract

We consider a four site Higgsless model based on the $SU(2)_L\times SU(2)_1\times SU(2)_2\times U(1)_Y$ gauge symmetry, which predicts two neutral and four charged extra gauge bosons, $Z_{1,2}$ and $W^\pm_{1,2}$. We compute the properties of the new particles, and derive indirect and direct limits on their masses and couplings from LEP and Tevatron data. In contrast to other Higgsless models, characterized by fermiophobic extra gauge bosons, here sizeable fermion-boson couplings are allowed by the electroweak precision data. The prospects of detecting the new predicted particles in the favoured Drell-Yan channel at the LHC are thus investigated. The outcome is that all six extra gauge bosons could be discovered in the early stage of the LHC low-luminosity run.