Speaker
Kazuki Kojima
(Nagoya University)
Description
Persistent anomalies reported by various experiments in $b \to c$ and $b \to s \ell \ell$ transitions hint at possible violation of lepton-flavor universality. The Belle II experiment at the SuperKEKB collider probes the relevant effects using observables complementary to those explored elsewhere. This talk reports recent results from a sensitive search for $B^+ \to K^+ \nu \bar \nu$ decays, and an inclusive determination of the branching fraction of bottom mesons into hadrons and tau leptons, relative to that into hadrons and light leptons.
Author
Kazuki Kojima
(Nagoya University)