2021/03/31 by Kriewald, J., Hati, C., Orloff, J. +1
#FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High Energy Physics - Phenomenology (hep-ph)
paper · doi:10.48550/arxiv.2104.00015
In view of the emerging hints for the violation of lepton flavour universality in several B-meson decays, we conduct a model-independent study (effective field theory approach) of several well-motivated new physics scenarios. Taking into account the most recent LHCb data, we provide updates to Wilson coefficient fits for numerous popular new physics hypotheses. We also consider a promising model of vector leptoquarks, which in addition to explaining the B-meson decay anomalies (RK(*) and RD(*)) would have an extensive impact for numerous flavour observables. We identify promising decay modes allowing to (indirectly) probe such an extension: these include positive signals (at Belle II or LHCb) for τ→ ϕμ, B(s)-meson decays to τ+ τ- and τ+ μ- (τ+ e-) final states, as well as an observation of certain charged lepton flavour violation transitions at COMET and Mu2e. We also argue how the evolution of the experimental determination of RD(*) can prove instrumental in falsifying a vector leptoquark explanation of the anomalous B-meson decay data.