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

TL;DR

This paper discusses recent results and future prospects of radiative and electroweak penguin decays of B mesons at Belle II, focusing on anomalies in b to s l+ l- processes and neutrino-involving decays, which are crucial for exploring physics beyond the Standard Model.

Contribution

It presents the first inclusive analysis of B to X_s l+ l- decays and a search for B to K(*) nu nubar at Belle II, providing new insights into potential new physics signals.

Findings

Measurement of inclusive B to X_s l+ l- decay rates.

Search results for B to K(*) nu nubar decays.

Implications for lepton flavor universality violation.

Abstract

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 $B \to K^{(*)} \nu \overline{\nu}$.