Speaker
Description
Employing the full $BABAR$ dataset, the first two-dimensional unbinned angular analysis of the semileptonic decay $\overline{B}\to D\ell^m \overline{\nu_\ell}$ is performed in both $q^2$ and lepton helicity angle, making use of the hadronic reconstruction of the tag-side $B$ meson. Here $\ell$ stands for an electron or a muon. A novel data-driven signal-background separation procedure with minimal dependence on simulation is developed, that preserves all multi-dimensional correlations present in the data.
Including input from latest lattice QCD and previously available experimental data, the underlying form-factors are extracted in both model-dependent and independent methods. The CKM matrix element $|V_{cb}|$ and the SM prediction of the lepton-flavor universality violation variable R(D) are extracted.
