31st International Workshop on Deep Inelastic Scattering

Recent results from Belle II

11 avr. 2024, 10:20

20m

Maison MINATEC, Grenoble, FRANCE

Regular parallel talk WG3: Electroweak Physics and Beyond the Standard Model WG3

Orateur

Youngjoon Kwon (Yonsei University)

Description

The Belle II experiment has collected a 424 fb${}^{-1}$ data set of $e^{+}{e}^{-}$ collisions produced by the asymmetric-energy SuperKEKB collider. Three-quarters of the data have a centre-of-mass energy equal to the mass of the $\mathrm{{\rm Y}}(4S)$ resonance, which decays to $B$-meson pairs, allowing measurements of rare $B$ decays, $CP$ violation, and searches for lepton universality violation. Highlights include the first observation of $B\to K\nu \overline{\nu }$ and measurements of lepton-universality in semitauonic $B$ decays. We have also recorded a dedicated 19.2$$fb${}^{-1}$ data set away from the $\mathrm{{\rm Y}}(4S)$, where we have made measurements related to the properties of the $\mathrm{{\rm Y}}(10753)$, to probe its potentially exotic nature. Our first results related to charm hadron decays, which use the full data sample, are also presented.

Documents de présentation

DIS2024_Belle-II_Kwon.pdf