An isosinglet W' at the LHC: updated bounds from direct searches

TL;DR

This paper updates constraints on an iso-singlet W' boson using recent LHC resonance and angular distribution searches, highlighting the growing importance of indirect bounds and the need for higher energy runs to explore certain decay channels.

Contribution

It provides an updated analysis of W' bounds incorporating latest LHC data, emphasizing the relevance of indirect constraints and future collider requirements.

Findings

Bounds on quark couplings are now competitive with direct search limits.

Stringent mixing angle bounds from WZ final states.

Higher energy LHC runs are needed to probe specific decay channels.

Abstract

We study the implications of the latest LHC searches for resonances in the di-jet and di-boson final states and for quark compositeness in the di-jet angular distributions on an iso-singlet W' with unit hypercharge. Predictions presented in previous papers are collected and updated to take into account all the present bounds from direct searches. It turns out that bounds on the coupling to quarks coming from the LHC measurements of di-jet angular distributions are starting to be competitive with the ones coming from direct searches in the di-jet invariant mass spectrum. Moreover, the stringent bounds on the mixing angle coming from the new searches in the $WZ\to l^{+}l^{-}l\nu$ final state, imply, in the case of discovery, the necessity to go to the LHC with $\sqrt{s}=14$ TeV to be able to probe interesting masses and couplings relevant for the W' decay into the W\gamma\ final state, particularly relevant to get more insight on the nature of the new vector.