Unitarity sum rules, three site moose model, and the ATLAS 2 TeV diboson anomalies

TL;DR

This paper explores the interpretation of ATLAS 2 TeV diboson anomalies as a W' boson within a three site moose model, emphasizing unitarity sum rules and custodial symmetry to predict coupling relations and favoring a non-standard Higgs boson.

Contribution

It introduces a model-independent analysis using unitarity sum rules and custodial symmetry to relate couplings and interprets the anomalies within a three site moose model framework.

Findings

ATLAS 2 TeV diboson anomalies can be explained by a W' in the three site moose model.

Unitarity sum rules predict relations among various gauge couplings.

A non-standard Higgs boson is favored by current data.

Abstract

We investigate $W'$ interpretations for the ATLAS 2 TeV diboson anomalies. The roles of the unitarity sum rules, which ensure the perturbativity of the longitudinal vector boson scattering amplitudes, are emphasized. We find the unitarity sum rules and the custodial symmetry are powerful enough to predict various nontrivial relations among $WWZ'$, $WZW'$, $WWh$, $WW'h$ and $ZZ'h$ coupling strengths in a model independent manner. We also perform surveys in the general parameter space of $W'$ models and find the ATLAS 2 TeV diboson anomalies may be interpreted as a $W'$ particle of the three site moose model, i.e., a Kaluza-Klein like particle in a deconstructed extra dimension model. It is also shown that the non standard-model-like Higgs boson is favored by the present data to interpret the ATLAS diboson anomalies as the consequences of the $W'$ and $Z'$ bosons.