Results and Prospects of Radiative and Electroweak Penguin Decays at Belle II

Radiative and electroweak penguin mediated decays of $B$ mesons are a great probe for physics beyond the Standard Model of particle physics. Furthermore, recently anomalies on exclusive $b \rightarrow s \ell^{+} \ell^{-}$ processes, which may imply lepton flavor universality violation, have been observed. Belle II experiment sheds light on the anomalies with the measurement of an inclusive analysis in this mode. Thanks to smaller hadronic uncertainties compared with exclusive modes, complementary information can be provided. Belle II is also a unique experiment to search for processes involving neutrinos such as $B \rightarrow K^{(*)} \nu \overline{\nu}$. We report the results and prospects of an inclusive $B \rightarrow X_s \ell^{+} \ell^{-}$ analysis and a search for $B \to K^{(*)} \nu \overline{\nu}$.

$B$介子的辐射企鹅图和电弱企鹅图介导的衰变是探索超出粒子物理标准模型的物理的重要探针。此外，最近在专属的$b \to s\ell^{+}\ell^{-}$过程中观测到了一些反常现象，这可能意味着轻子味普适性遭到破坏。 Belle II实验通过对这种模式下的一个包含性分析的测量来阐明这些反常现象。由于与专属模式相比，其强子不确定性更小，所以能够提供互补的信息。Belle II也是一个独特的实验，用于寻找涉及中微子的过程，比如$B \to K^{(*)}\nu\overline{\nu}$。我们报告了一个包含性的$B \to X_s\ell^{+}\ell^{-}$分析以及对$B \to K^{(*)}\nu\overline{\nu}$的寻找结果和展望。