Speaker
Seema Choudhury
(Iowa State University)
Description
The Belle II experiment has collected a 424 fb$^{-1}$ sample of $e^+e^-$ collisions produced by the asymmetric SuperKEKB collider. Ninety percent of the sample is at the $\Upsilon(4S)$ resonance, which decays to $B$-meson pairs. The predecessor experiment, Belle, collected nearly 1$~$ab$^{-1}$ of data from 1999-2010, three-quarters of which was at the $\Upsilon(4S)$. From these $\Upsilon(4S)$ data, we have made measurements of rare $B$ decays and $C\!P$ violation, as well as searched for lepton-universality violation. Highlights include the first observation of $B\to K\nu\bar{\nu}$ and measurements of lepton-universality in semitauonic $B$ decays.
Primary authors
Sven Vahsen
(University of Hawaii)
Seema Choudhury
(Iowa State University)