First results of $B\to DK$ decays at Belle II
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Pre-published on:
January 13, 2023
Published on:
June 16, 2023
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 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.
DOI: https://doi.org/10.22323/1.411.0121
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Copyright owned by the author(s) under the term of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
Copyright owned by the author(s) under the term of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.