A broad 750 GeV diphoton resonance? Not alone

Understand

The hint for a possible resonance in the diphoton channel with mass of 750~GeV disappeared in the data presented at ICHEP'16 by ATLAS and CMS.

• However, the diphoton final state remains as one of the golden channels for new physics discoveries at the TeV scale in the LHC experiments.
• This motivates us to analyze model-independently the implications of an O(TeV) bump in the $\gamma\gamma$ final state.
• By means of forward sum-rules for $\gamma\gamma$ scattering, we show that a spin-0 resonance with mass of the order of the TeV and a sizable $\gamma\gamma$ partial width -of the order of a few GeV- must be accompanied by higher spin resonances with $J_R\geq 2$ with similar properties, as expected in strongly coupled extensions of the Standard Model or, alternatively, in higher dimensional deconstructed duals.