Speaker
Markus Tobias Prim
(University of Bonn (DE))
Description
The Belle and Belle II experiments have collected a 1.1$~$ab$^{-1}$ sample of $e^+ e^-\to B\bar{B}$ collisions at the $\Upsilon(4S)$ resonance. These data, with low particle multiplicity, constrained initial state kinematics and excellent lepton identification, are ideal to study lepton-flavour universality in semileptonic decays of the $B$ meson.
We present results on the ratios of semitauonic decay rates to semileptonic decays with light leptons, in both exclusive and inclusive $B$ decays. These include new measurements of the ratios for exclusive $B\to D^{(*)}\ell \nu$ decays, $R(D^{(*)})$. We also present measurements of angular observables that test universality between electrons and muons.
| Alternate track | 03. Beyond the Standard Model |
|---|---|
| I read the instructions above | Yes |
Authors
Markus Tobias Prim
(University of Bonn (DE))
Alina Charlotte Manthei
(University of Bonn (DE))
Sven Vahsen
(University of Hawaii (US))
