See-Saw Composite Higgses at the LHC: Linking Naturalness to the $750$ GeV Di-Photon Resonance

TL;DR

This paper proposes a see-saw composite Higgs model that naturally explains the 750 GeV di-photon excess observed at the LHC, linking it to a new resonance and heavy charged states within a naturalness framework.

Contribution

It introduces a novel see-saw composite Higgs model that accounts for the 750 GeV resonance and predicts new heavy pseudo-Goldstone bosons and fermions, connecting experimental excesses to naturalness.

Findings

The model naturally explains the 750 GeV di-photon excess.

Predicts new heavy pseudo-Goldstone bosons heavier than the SM Higgs.

Forecasts TeV-scale fermions associated with the resonance.

Abstract

We explore the possibility of explaining the recent $\sim 750$ GeV excesses observed by ATLAS and CMS in the $\gamma\gamma$ spectrum in the context of a compelling theory of Naturalness. The potential spin-zero resonance responsible for the excesses also requires the existence of new heavy charged states. We show that both such features are naturally realized in a see-saw Composite Higgs model for EWSB, where the new pseudo-Goldstone bosons are expected to be comparatively heavier than the SM Higgs, and the new fermions have masses in the TeV range. If confirmed, the existence of this new resonance could be the first stone in the construction of a new theory of Naturalness.