Speaker
Patrizia de Simone
Description
The semileptonic decays of b-hadrons are a rich source of observables sensitive to Standard Model and New Physics paramaters.
In the last decade, measurements of ratios of decay rates between the tauonic and the muonic tree level $b \rightarrow c$ transitions,
have hinted at potential violations of the Lepton Flavour Universality, which require further investigation.
This talk presents the most recent results of LFU tests performed studying the semileptonic $b \rightarrow c$ transitions at LHCb:
the ratios of branching fractions of $B\rightarrow D(*) \tau \nu$ and $B\rightarrow D(*)\mu \nu$ decays,
and the measurement of the $D^*$ longitudinal polarization in $B\to D^* \tau \nu$ decays.
Primary authors
Keri Vos
(Maastricht University)
Patrizia de Simone