A weakly constrained W' at the early LHC

TL;DR

This paper investigates the phenomenology of a weakly constrained charged W' boson at the early LHC, exploring its production, decay channels, and potential to reveal new physics such as compositeness.

Contribution

It provides an effective approach analysis of a W' boson, highlighting weak current bounds and exploring discovery prospects in dijet, Wγ, and WZ channels at the early LHC.

Findings

Weak bounds on W' from current data for certain quark mixing matrices.

Potential for early LHC to detect W' in dijet and bosonic decay channels.

Wγ decay channel offers insights into the resonance's possible composite nature.

Abstract

We study, within an effective approach, the phenomenology of a charged W' vector which transforms as an isosinglet under the Standard Model gauge group. We discuss bounds from present data, finding that these are quite weak for suitable choices of the right-handed quark mixing matrix. Then we study the resonant production at the early LHC of such a weakly constrained W'. We start discussing the reach in the dijet final state, which is one of the channels where the first W' signal would most likely appear, and then we analyse prospects for the more challenging discovery of W' decays into W{\gamma} and WZ. We show in particular that the former can be used to gain insight on the possibly composite nature of the resonance.