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The CMS experiment at CERN has reported a possible signal for a resonance at146 GeV decaying into the $e\mu$ final state which, presently, is the onlyexperimental hint for lepton flavour violation in any low- and high-energyexperiment. The Froggatt-Nielsen mechanism naturally predicts the existence ofnew scalars, the flavons, with flavour off-diagonal couplings. We study thisframework in the context of the CMS result and find that the minimal, purelyleptophilic model is too restricted to match the claimed signal. Thereafter weshow how models with additional flavon couplings to quarks can explain theclaimed signal while satisfying all the existing constraints on lepton flavourviolation.

Production and decays of 146 GeV flavons into $e\mu$ final state at the LHC