Speaker
Kimika Arai
(University of Pittsburgh (US))
Description
The Belle and Belle~II experiments have collected a 1.1~ab$^{-1}$ sample
of $e^+ e^-\to B\bar{B}$ collisions at a centre-of-mass energy
corresponding to the $\Upsilon(4S)$ resonance. These data allow
measurements of $CP\!$ violation and the Cabibbo-Kobayashi-Maskawa
matrix elements in $B$-meson decay. In particular, we measure the
$CP$-violating phase $\phi_1/\alpha$ and $\left|V_{cb}\right|$. In
addition, we present constraints on the branching fractions of
$B^+\to\ell^+\nu~(\ell=\mu,~\tau)$, which are related to
$\left|V_{ub}\right|$.
Author
Kimika Arai
(University of Pittsburgh (US))
