First results of $B \to DK$ decays at Belle II

Sumitted to PubDB: 2022-02-20

Category: Proceeding, Visibility: Public

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Authors	Niharika Rout
Date	Feb. 20, 2022
Belle II Number	BELLE2-CONF-PROC-2022-003
Abstract	This proceeding reports the first measurement of the observables related to hadronic $B$ decays containing charm mesons using 62.8 fb$^{-1}$ of dataset collected by the Belle II experiment along with the first measurement of the the CKM unitarity triangle angle $\phi_3$ from a combining Belle and Belle II datasets that correspond to integrated luminosities of 711~fb$^{-1}$ and 128~fb$^{-1}$, respectively. The measured value of $\phi_3$ is $\left(78.4 \pm 11.4 \pm 0.5 \pm 1.0 \right)^{\circ}$, where the first uncertainty is statistical, the second is the experimental systematic uncertainty and the third is from the uncertainties on external measurements of the $D$-decay strong-phase parameters.