A closer look to the sgoldstino interpretation of the diphoton excess

Abstract

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. Their effective coupling to the sgoldstino is correspondingly enhanced, and a non-perturbative regime is triggered when light and heavy messenger masses differ by a factor $\sim 4\pi$. We also comment on the possible role of an R-axion and on the possibility to decouple the sfermions in this context.

References in corpus (2)

• Parton distributions for the LHC
• R-axion detection at LHC

Cited by in corpus (8)

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• The Higgs of the Higgs and the diphoton channel
• Learning from the New Higgs-like Scalar before It Vanishes
• 750 GeV Diphotons from Supersymmetry with Dirac Gauginos
• SUSY-Breaking Scenarios With a Mildly Violated R Symmetry
• The Light Sgoldstino Phenomenology: Explanations for the Muon $(g-2)$ Deviation and KOTO Anomaly
• Multi-step production of a diphoton resonance