Precision tools and models to narrow in on the 750 GeV diphoton resonance

Understand

The hints for a new resonance at 750 GeV from ATLAS and CMS have triggered a significant amount of attention.

• Since the simplest extensions of the standard model cannot accommodate the observation, many alternatives have been considered to explain the excess.
• Here we focus on several proposed renormalisable weakly-coupled models and revisit results given in the literature.
• We point out that physically important subtleties are often missed or neglected.