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hep-ex2026
Test of lepton flavor universality with and decays at Belle II
Belle II Collaboration, M. Abumusabh, I. Adachi +494
We test lepton flavor universality with a measurement of the branching-fraction ratios $R(D^{(*)}) \equiv \mathcal{B}(\bar{B} \rightarrow D^{(*)} τ^{-} \barν_τ)/\mathcal{B}(\bar{B}…
hep-ex2026
Observation of the decays and
Belle, Belle II Collaborations, : +403
We report the first observation of the decays and , with significances of a…