750 GeV Resonance in the Dark Left-Right Model

TL;DR

This paper explains the 750 GeV diphoton resonance using a dark left-right symmetric model that also accounts for dark matter stability, relic density, and muon g-2 anomalies.

Contribution

It introduces a model where a scalar explains the resonance and links it to dark matter properties and muon g-2, with specific predictions.

Findings

Scalar couples mainly to gluons and photons

Model fits the diphoton signal and dark matter relic density

Predicts dark matter mass of 200 GeV

Abstract

We explain the $750$ GeV diphoton resonance in the context of the dark left-right symmetric model. A global symmetry in this model, stabilizes the dark matter and ensures that the scalar couples dominantly to gluons and photons. The branching fraction of the scalar to diphoton is large as a consequence of the symmetries of the theory. The benchmark values assumed to fit the diphoton signal also give the correct relic density of dark matter and muon $(g-2)$. A specific prediction of this model is that the dark matter has a mass of 200 GeV.