A new scalar resonance at 750 GeV: Towards a proof of concept in favor of strongly interacting theories

Understand

We interpret the recently observed excess in diphoton invariant mass as a new spin-0 resonant particle.

• On the theoretical ground, an interesting question is whether this new scalar resonance belongs to a strongly coupled sector or a well-defined weakly coupled theory.
• A possible UV-completion that has been widely considered in literature is based on the existence of new vector-like fermions whose loop contributions---Yukawa-coupled to the new resonance---explain the observed signal rate.
• The large total width preliminarily suggested by data seems to favor a large Yukawa coupling, at the border of a healthy perturbative definition.