Explaining The Rk And Rd(*) Anomalies With Vector Leptoquarks

Recently, the B factories BABAR and Belle as well as the LHCb experiment have reported several anomalies in the semileptonic B meson decays, such as the R-K and R-D(*) etc. We investigate these deviations by considering the vector leptoquarks relevant for both b -> sl(+)l(-) and b -> cl(-)v(l) transitions. The leptoquark parameter space is constrained by using the experimentally measured branching ratios of B-s -> l(broken vertical bar) l(-), (B) over bar -> X(s)l(broken vertical bar) l(-) (v (v) over bar), and B-u(broken vertical bar) -> l(broken vertical bar) v(1) processes. Using the constrained leptoquark couplings, we compute the branching ratios, forward- backward asymmetries, tau, and D* polarization parameters in the (B) over bar -> D-(*) l (v) over bar (1)processes. We find that the vector leptoquarks can explain both the R-D(*) and R-K anomalies, simultaneously. Furthermore, we study the rare leptonic B-u,c(*) -> l (v) over bar decay processes in this model.