A lesson from R_{\tau\tau}^{K^{(\ast)}}R ττ K (∗) and R_{\nu\nu}^{K^{(\ast)}}R νν K (∗) at Belle II

Within the assumption of Left-Handed (LH) New Physics (NP), we review the relations between B(B → K(∗) τ +τ −) and B(B → K(∗) νν¯) for several Beyond the Standard Model (BSM) scenarios, commonly considered to explain the Lepton flavor Universality (LFU) violation observed in charged and neutral-current semileptonic B decays. We employ the latest RD(∗) world averages that include the recent LHCb measurement and assess the possibility of simultaneously explaining the B-anomalies without spoiling current bounds on di-neutrino and di-tau modes. This is particularly relevant in light of the upcoming results by Belle II on neutrinos and the continuing improvement in accuracy and sensitivity achieved in tau modes.

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Nov 10, 2022

A lesson from R_{\tau\tau}^{K^{(\ast)}}R ττ K (∗) ​ and R_{\nu\nu}^{K^{(\ast)}}R νν K (∗) ​ at Belle II

A lesson from R_{\tau\tau}^{K^{(\ast)}}R ττ K (∗) and R_{\nu\nu}^{K^{(\ast)}}R νν K (∗) at Belle II