Confronting lepton flavor universality violation in B decays with high-pT tau lepton searches at LHC

We confront the indications of lepton flavor universality (LFU) violation observed in semi-tauonic B meson decays with new physics (NP) searches using high p(T) tau leptons at the LHC. Using effective field theory arguments we correlate possible non-standard contributions to semi-tauonic charged currents with the tau(+)tau(-) signature at high energy hadron colliders. Several representative standard model extensions put forward to explain the anomaly are examined in detail: (i) weak triplet of color-neutral vector resonances, (ii) second Higgs doublet and (iii) scalar or (iv) vector leptoquark. We find that, in general, tau(+)tau(-) searches pose a serious challenge to NP explanations of the LFU anomaly. Recasting existing 8TeV and 13 TeV LHC analyses, stringent limits are set on all considered simplified models. Future projections of the tau(+)tau(-) constraints as well as caveats in interpreting them within more elaborate models are also discussed. (C) 2016 The Authors. Published by Elsevier B.V.