Sumitted to PubDB: 2022-09-30

Category: Proceeding, Visibility: Public

Tags: -

Authors
Non-Belle II authors	Daniel Dorner
Date	2022-09-19
Belle II Number	BELLE2-CONF-PROC-2022-015
Abstract	The Belle II collaboration presents their first measurements of the magnitude of the Cabibbo-Kobayashi-Maskawa matrix elements $|V_{cb}|$ and $|V_{ub}|$, as well as their first branching fraction measurement of $B\to K^{\ast }{\ell }^{+}{\ell }^{-}$ based on up to 189.26 fb${}^{-1}$ of data collected at the $\mathrm{{\rm Y}}(4S)$ resonance. In all presented analyses the hadronic tag from Belle II's full event interpretation was used. $|V_{cb}|$ was measured using $B^0\to D^{\ast -}{\ell }^{+}{\nu }_{\ell }$ by performing a fit to its w distribution. In addition, the results of an inclusive $|V_{cb}|$ fit based on measurements of $q^2$ moments from Belle II and Belle is presented. $|V_{ub}|$ was obtained using a fit to the $q^2$ distribution of $B^{+}\to {\pi }^0{e}^{+}{\nu }_e$ and $B^0\to {\pi }^{-}{e}^{+}{\nu }_e$.

• BELLE2-CONF-PROC-2022-015.pdf (versions: 6, 5, 4, 3, 2, 1)
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