B decay anomalies and dark matter from vectorlike confinement

Lepton flavor universality violating B -> Kll and K*ll decays tentatively observed by LHCb can be explained by leptoquark exchange. We explore a simple model for the B anomalies with a composite leptoquark from new strong dynamics at the TeV scale, a confining SU(N-HC) hypercolor interaction. The new matter fields, fundamentals under SU(N-HC), are heavy vectorlike fermions Psi, S, and an inert scalar doublet phi. Psi is colored under QCD while S is neutral, and the hyperbaryon S-N is an asymmetric dark matter candidate. The model is tightly constrained by meson-antimesonoscillations, lepton flavor violation, and LHC searches for resonant production of the exotic bound states. The dark matter may be detectable through its magnetic dipole moment. If m(S) is sufficiently small, composite leptoquarks and heavy lepton partners can be pair-produced at an observable level at LHC.