W' production at the LHC in the 4-site Higgsless model

TL;DR

This paper investigates the production and detection prospects of new charged gauge bosons predicted by the 4-site Higgsless model at the LHC, highlighting its distinctive non-fermiophobic features and potential for discovery in early LHC runs.

Contribution

It provides the first detailed analysis of W1,W2-boson phenomenology in the 4-site Higgsless model, including current limits and future discovery potential at the LHC.

Findings

Current Tevatron limits on W1,W2 masses and couplings.

Estimated exclusion limits at 7 TeV LHC with 1 fb-1.

Potential discovery of W1,W2 bosons in early LHC data.

Abstract

We study the phenomenology of the 4-site Higgsless model, based on the $SU(2)_L\times SU(2)_1\times SU(2)_2\times U(1)_Y$ gauge symmetry, at present colliders. The model predicts the existence of two neutral and four charged extra gauge bosons, Z1,Z2,W1,W2. In this paper, we focus on the charged gauge sector. We first derive limits on W1,W2-boson masses and couplings to SM fermions from direct searches at the Tevatron. We then estimate at the 7 TeV LHC the exclusion limits with the actual L=1 fb-1 and the discovery potential with the expected L=10 fb-1. In contrast to the minimal (or 3-site) Higgsless model which predicts almost fermiophobic extra gauge bosons, the next-to-minimal (or 4-site) Higgsless model recovers sizeable W1,W2-boson couplings to ordinary matter, expressing the non-fermiophobic multiresonance inner nature of extra-dimensional theories. Owing to this feature, we find that in one year from now the new heavy gauge bosons, W1 and W2, could be discovered in the final state with an electron and large missing transverse energy at the 7 TeV LHC for W1,W2-boson masses in the TeV region, depending on model parameters.