A closer look to the sgoldstino interpretation of the diphoton excess

Understand

We revisit the sgoldstino interpretation of the diphoton excess in the context of gauge mediation.

• While the bound on the gluino mass might seem to make the sgoldstino contribution to the diphoton excess unobservable, we show that the interpretation is viable in a thin, near critical region of the parameter space.
• This regime gives rise to drastic departures from the standard gauge mediation picture.
• While the fermion messengers lie in the (10-100) TeV range, some scalar messengers are significantly lighter and are responsible for the sgoldstino production and decay.