Speaker
Mr.
Robin Glattauer
(HEPHY Vienna)
Description
Semileptonic B meson decays, $B \to X \ell \nu$, are currently the preferred modes for determining the Cabibbo-Kobayashi-Maskawa (CKM) matrix elements $|V_{cb}|$ and $|V_{ub}|$, two fundamental parameters of the Standard Model. At the same time they can also be used to test and refine the theoretical tools used for describing B mesons and their decays. Purely leptonic B meson decays, $B \to \ell \nu$, are helicity-suppressed in the SM, and while more challenging for the extraction of the CKM matrix elements, they are excellent probes of models beyond the SM. The decay $B \to \mu \nu$ is at the edge of the sensitivity of current experiments, while $B \to e \nu$ will remain inaccessible to the next generation of experiments in the SM. Based on the large data sample accumulated by the Belle experiment at the KEKB asymmetric energy $e^+ e^-$ collider at KEK, Japan, we present new results on semileptonic and leptonic $B_{(s)}$ meson decays.
Primary author
Prof.
Youngjoon Kwon
(Yonsei University)
