Toward a coherent solution of diphoton and flavor anomalies

TL;DR

This paper presents a unified model explaining the 750 GeV diphoton excess and B decay flavor anomalies through a new strongly interacting sector, predicting observable signatures at the LHC.

Contribution

It introduces a novel strongly interacting sector with vectorlike confinement that accounts for both anomalies and provides detailed phenomenological predictions.

Findings

Model fits all current data well.

Predicts a broad excess in tau+ tau- invariant mass distributions.

Suggests observable signatures at the LHC in the near future.

Abstract

We propose a coherent explanation for the 750 GeV diphoton anomaly and the hints of deviations from Lepton Flavor Universality in B decays in terms a new strongly interacting sector with vectorlike confinement. The diphoton excess arises from the decay of one of the pseudo-Nambu-Goldstone bosons of the new sector, while the flavor anomalies are a manifestation of the exchange of the corresponding vector resonances (with masses in the 1.5-2.5 TeV range). We provide explicit examples (with detailed particle content and group structure) of the new sector, discussing both the low-energy flavor-physics phenomenology and the signatures at high $p_T$. We show that specific models can provide an excellent fit to all available data. A key feature of all realizations is a sizable broad excess in the tails of $\tau^+ \tau^-$ invariant mass distribution in $p p \to \tau^+ \tau^-$, that should be accessible at the LHC in the near future.