Latest results on semileptonic and electroweak penguin decays at Belle II

Abstract

The Belle~II Collaboration presents four new analyses: The measurement of $V_{ub}$ from $B\to \pi e{\nu }_e$ decays with a fit to the differential $q^2$ spectrum, the determination of $V_{cb}$ using a fit to the differential $w$ distribution from $B^0\to D^{\ast -}{\ell }^{+}{\nu }_{\ell }$ decays, and the measurement of $q^2$ moments in inclusive $B\to X_c\ell {\nu }_{\ell }$ decays. In all these analyses tag-side $B$ meson is reconstructed in a fully hadronic decay chain. The last result are branching fraction measurement of $B\to K^{\ast }{\ell }^{+}{\ell }^{-}$ decays using an untagged approach.

arXiv commentcontribution to the 2022 QCD session of the 56th Rencontres de Moriond