Interpreting a 2 TeV resonance in WW scattering

TL;DR

This paper investigates a potential 2 TeV resonance in WW scattering observed at the LHC, using unitarization methods to interpret the signals within an extended symmetry breaking framework and improve experimental comparisons.

Contribution

It introduces a unitarized effective Lagrangian approach to interpret the diboson excess and predicts resonance widths, enhancing analysis tools for LHC data.

Findings

Determines low-energy constants consistent with a 2 TeV resonance

Predicts resonance widths based on unitarity

Provides unitarized form factors for Monte Carlo simulations

Abstract

A diboson excess has been observed ---albeit with very limited statistical significance--- in $WW$, $WZ$ and $ZZ$ final states at the LHC experiments using the accumulated 8 TeV data. Assuming that these signals are due to resonances resulting from an extended symmetry breaking sector in the standard model and exact custodial symmetry we determine using unitarization methods the values of the relevant low-energy constants in the corresponding effective Lagrangian. Unitarity arguments also predict the widths of these resonances. We introduce unitarized form factors to allow for a proper treatment of the resonances in Monte Carlo generators and a more precise comparison with experiment.