Measurement of the inclusive semileptonic BB meson branching fraction in 62.8 fb−1^{-1} of Belle II data

International audienceWe report a measurement of the branching fraction of inclusive semileptonic $B$ meson decays $B\to X_c\ell\nu\ell$ in $\Upsilon(4S)\to B\bar B$~data recorded by the Belle II experiment at the SuperKEKB asymmetric-energy $e^+e^-$ collider and corresponding to 62.8 fb$^{-1}$ of integrated luminosity. Only a charged lepton (electon or muon) is reconstructed and the signal yield is determined from a fit to the lepton momentum distribution in the center-of-mass frame of the colliding beams. Averaging the result in the electron and muon channels, we find $\mathcal {B} (B \rightarrow X_c \ell\nu_{\ell}) = (9.75 \pm 0.03(stat) \pm 0.47(sys))$%

Measurement of the inclusive semileptonic BB meson branching fraction in 62.8 fb−1^{-1} of Belle II data

We report a measurement of the branching fraction of inclusive semileptonic $B$ meson decays $B\to X_c\ell\nu\ell$ in $\Upsilon(4S)\to B\bar B$~data recorded by the Belle II experiment at the SuperKEKB asymmetric-energy $e^+e^-$ collider and corresponding to 62.8 fb$^{-1}$ of integrated luminosity. Only a charged lepton (electon or muon) is reconstructed and the signal yield is determined from a fit to the lepton momentum distribution in the center-of-mass frame of the colliding beams. Averaging the result in the electron and muon channels, we find $\mathcal {B} (B \rightarrow X_c \ell\nu_{\ell}) = (9.75 \pm 0.03(stat) \pm 0.47(sys))$%

Measurement of the inclusive semileptonic BB meson branching fraction in 62.8 fb−1^{-1} of Belle II data

International audienceWe report a measurement of the branching fraction of inclusive semileptonic $B$ meson decays $B\to X_c\ell\nu\ell$ in $\Upsilon(4S)\to B\bar B$~data recorded by the Belle II experiment at the SuperKEKB asymmetric-energy $e^+e^-$ collider and corresponding to 62.8 fb$^{-1}$ of integrated luminosity. Only a charged lepton (electon or muon) is reconstructed and the signal yield is determined from a fit to the lepton momentum distribution in the center-of-mass frame of the colliding beams. Averaging the result in the electron and muon channels, we find $\mathcal {B} (B \rightarrow X_c \ell\nu_{\ell}) = (9.75 \pm 0.03(stat) \pm 0.47(sys))$%