Search for new phenomena in multi-body invariant masses in events with at least one isolated lepton and two jets using s = 13 TeV proton–proton collision data collected by the ATLAS detector

A search for resonances in events with at least one isolated lepton (e or μ) and two jets is performed using 139 fb−1 of s$$ \sqrt{s} $$ = 13 TeV proton–proton collision data recorded by the ATLAS detector at the LHC. Deviations from a smoothly falling background hypothesis are tested in three- and