Speaker
Description
Employing the full $BABAR$ dataset we extract form-factors for $\overline{B}\to D^{(\ast)}\ell^m \overline{\nu}_\ell$ using the hadronic tagging method. For $\overline{B}\to D\ell^m \overline{\nu}_\ell$, a two-dimensional angular analysis is performed in both $q^2$ and the lepton helicity angle. The two $B\to D$ form factors are determined using a joint fit with available lattice data. This enables checking flavor SU3 relations using comparisons with HPQCD $B_s\to D_s$ form-factors. An updated value of $V_{cb}$ from $B\to D$ is also extracted. The $B\to D^\ast$ form-factor fits in the BABAR-19 publication [PRL123 (2019) 9, 091801] are updated, using newly available $w>1$ lattice data (MILC/FNAL, HPQCD, JLQCD). The $BABAR$+lattice results are compared with the $BABAR$-only fits in BABAR-19. Finally, a combined $B\to D^{(\ast)}$ fit using the full $BABAR$ data and a HQET parametrization with higher order corrections in $1/m_{b,c}$ are described.
| In-person participation | No |
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