Revisiting R-parity violating interactions as an explanation of the B-physics anomalies

In the last few years, the ratios R_D^(*) and of R_K^(*) have reportedly exhibited significant deviations from the relevant standard model predictions, hinting towards a possible violation of Lepton Flavor Universality and a window to New Physics. We investigate to what extent the inclusion of R-parity violating couplings in the minimal supersymmetric standard model can provide a better fit to the anomalies simultaneously. We perform this analysis employing an approximate, non-abelian G_f = U(2)_q x U(2)_l flavour symmetry, which features a natural explanation of the appropriate hierarchy of the R-parity violating couplings. We show that, under the requirement of a supersymmetric spectrum with much heavier left-handed doublet superpartners, our assumption favors a considerable enhancement in the tree-level charged-current B → D^(*)τ anti ν, while the the anomalies induced by b → sl⁺l^- receive up to an approximate 30 % improvement. The consistency with all relevant low-energy constraints is assessed. (orig.)