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

Abstract

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 8 TeV 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.

11 pages, 6 figures

References in corpus (12)

• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• An Introduction to PYTHIA 8.2
• Big-Bang Nucleosynthesis
• The global electroweak fit at NNLO and prospects for the LHC and ILC
• On the B to D* tau nu Sensitivity to New Physics
• Implications of lepton flavor universality violations in B decays
• Search for neutral MSSM Higgs bosons decaying to a pair of tau leptons in pp collisions
• Search for neutral Higgs bosons of the minimal supersymmetric standard model in pp collisions at $\sqrt{s}$ = 8 TeV with the ATLAS detector
• Supersymmetry without a Light Higgs Boson
• B -> D tau nu Branching Ratios: Opportunity for Lattice QCD and Hadron Colliders
• Cornering Scalar Leptoquarks at LHC
• The phenomenology of the di-photon excess and $h\to \tau \mu$ within 2HDM

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