Jan 10 – 14, 2022
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New results on semileptonic B decays at Belle

Jan 12, 2022, 9:40 AM
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Parallel session talk Flavour Quark and charged lepton flavour


Florian Urs Bernlochner (University of Bonn (DE))


Though the Belle experiment has stopped data taking more than a decade ago, new results on semileptonic B meson decays are still being obtained. This is in part due to new experimental tools elaborated for Belle II applied to the Belle data set, such as the FEI (Full Event Interpretation) hadronic and semileptonic tag. We report new results on differential branching fractions of inclusive $B \to X_u \ell\nu$ and q2 moments in $B \to X_c \ell\nu$, which improve |Vub| and |Vcb| measurements. We also present measurements on exclusive decays $B \to \pi\pi\ell\nu$, $B \to \eta^{(\prime)} \ell\nu$ and $B \to D^{\ast\ast} \ell\nu$, which are relevant to |Vub| and R(D*) measurements.

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