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Searches for new leptophobic resonances at high energy colliders usuallytarget their decay modes into pairs of light quarks, top quarks, or standardmodel bosons. Additional decay modes may also be present, producing signaturesto which current searches are not sensitive. We investigate the performance ofgeneric searches that look for resonances decaying into two large-radius jets.As benchmark for our analysis we use a supersymmetric $\text{U}(1)'$ extensionof the Standard Model, the so-called U$\mu\nu$SSM, where all the SM decay modesof the $Z'$ boson take place, plus additional (cascade) decays into newscalars. The generic searches use a generic multi-pronged jet tagger and takeadvantage of the presence of $b$ quarks in the large-radius jets, and aresensitive to all these $Z'$ decay modes (except into light quarks) at once. Forcouplings that are well below current experimental constraints, these genericsearches are sensitive at the $3\sigma-4\sigma$ level with Run 2 LHC data.

Exotic diboson $Z'$ decays in the U$\mu\nu$SSM