Vectorlike chiral fourth family to explain muon anomalies

The Standard Model (SM) is amended by one generation of quarks and leptons which are vectorlike (VL) under theSMgauge group but chiral with respect to a newU(1)(3-4) gauge symmetry. We showthat this model can simultaneously explain the deviation of the muon g - 2 as well as the observed anomalies in b -> s mu(+)mu(-) transitions without conflicting with the data on Higgs decays, lepton flavor violation, or B-s - (B) over bar (s) mixing. The model is string theory motivated and Grand Unified Theory compatible, i.e. UV complete, and fits the data predicting VL quarks, leptons, and a massive Z' at the TeV scale, as well as tau -> 3 mu and tau -> mu gamma within reach of future experiments. The Higgs couplings to SM generations are automatically aligned in flavor space.