Symmetry Restored in Dibosons at the LHC?

TL;DR

This paper analyzes LHC resonance excesses around 1.8-2.0 TeV, fitting data to interpret them within a Left-Right Symmetric Model featuring a heavy $W_R$ boson, and explores potential links to dark matter.

Contribution

It provides a model-independent fit to LHC excesses and demonstrates that a single coupling $g_R \,\sim\, 0.4$ in the Left-Right Symmetric Model can explain the observations.

Findings

A heavy right-handed $W_R$ boson can account for the excesses.

A single coupling $g_R \sim 0.4$ suffices to explain the data.

Potential connection between the $W_R$ boson and dark matter is discussed.

Abstract

A number of LHC resonance search channels display an excess in the invariant mass region of 1.8 - 2.0 TeV. Among them is a $3.4\,\sigma$ excess in the fully hadronic decay of a pair of Standard Model electroweak gauge bosons, in addition to potential signals in the $HW$ and dijet final states. We perform a model-independent cross-section fit to the results of all ATLAS and CMS searches sensitive to these final states. We then interpret these results in the context of the Left-Right Symmetric Model, based on the extended gauge group $SU(2)_L\times SU(2)_R\times U(1)'$, and show that a heavy right-handed gauge boson $W_R$ can naturally explain the current measurements with just a single coupling $g_R \sim 0.4$. In addition, we discuss a possible connection to dark matter.