Search

We report the recent measurements performed using the data sample collected from 2019 to 2022 by the Belle~II experiment~\cite{Belle2:TDR} at $\Upsilon(4S)$ resonance, corresponding to an integrated luminosity of $362~\mathrm{fb}^{-1}$. We present the measurement of $B$ lifetime and mixing frequency, the time dependent CP-violation analyses using the $B^0\to J\psi K_S^0$, $B^0\to \phi K_S^0$, $B^0\to K_S^0K_S^0K_S^0$, $B^0\to K_S^0\pi^0$ decays and the implication of the latter for the isospin sum rule, the observation of $B\to D^{(*)} K^-K_S^0$ decays, the analysis of $B\to X_s\gamma$. We also present the measurements of the angle $\gamma$ using $B\to DK$ decays, with the combined dataset collected by Belle and Belle II., Comment: Contribution to the 2023 QCD session of the 57th Rencontres de Moriond

41st International Conference on High Energy physics, ICHEP2022, Bologna, Italy, 6 Jul 2022 - 13 Jul 2022; Proceedings of Science / International School for Advanced Studies (ICHEP2022), 743 (2022). doi:10.22323/1.414.0743, We report on the recent measurements of electroweak and radiative penguin $B$ decays at the Belle II experiment. We use samples of electron-positron collisions collected at the $\Upsilon(4S)$ resonance. We present the measurement of the branching fractions of $B^{+/0}\to K^*(892)^{+/0}\ell^+\ell^-~(\ell=e, \mu)$, $B^{+/0}\to K^{+/0}J/\psi$, and $B^{+/0}\to X_s\gamma$ decays in the data corresponding to 189 fb$^{-1}$ of integrated luminosity. We also present a search of $B^+\to K^+\nu\bar\nu$ decay in the data corresponding to 63 fb$^{-1}$ of integrated luminosity., Published by SISSA, Trieste