Abstract
We confront the malaphoric B3 - L2 model with bounds coming from a search for resonances in the di-lepton channels at the 13 TeV LHC. In contrast to the original B3 - L2 model, the Z' of the malaphoric B3 - L2 model has sizeable couplings to the lighter two families; these originate from order unity kinetic mixing with the hypercharge gauge boson and ameliorate the fit to lepton flavour universality measurements in B-meson decays. The Z' coupling to the first two families of quark means that the resulting constraints from resonant di-lepton searches are stronger. Nevertheless, we find that for MZ' > 2.8 TeV there remains a non-negligible region of allowed parameter space where the model significantly improves upon several Standard Model predictions for observables involving the b → sl+l- transition. We estimate that the 3000 fb - 1 HL-LHC will extend this sensitivity to MZ' = 4.2 TeV.