B Decay Anomalies from Nonabelian Horizontal Symmetry

Speaker: Jim Cline

I consider a theory of flavor in which matter transforms under a local SU(3)_L x SU(3)_R flavor symmetry group, acting in the same way on quarks and leptons. It breaks to a U(1) subgroup whose associated Z' gauge boson can explain the observed anomalies in B->K l l decays. To satisfy ATLAS dilepton and perturbativity constraints, the Z' mass should be not far above 5 TeV, hence close to discovery at LHC. New contributions to B-\bar B and K-\bar K mixing are not much below current limits, and possibly also lepton-flavor violating decays mu -> 3e, tau -> 3l and violation of CKM unitarity.