Simultaneous analysis of B->Dlnu and B->D*lnu to improve the determination of |Vcb|
Category: Talk, Visibility: Public
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| Authors | Michele Mantovano |
|---|---|
| Date | Sept. 23, 2024 |
| Belle II Number | BELLE2-TALK-CONF-2024-124 |
| Abstract | We propose a simultaneous analysis of $B\to D\ell\nu$ and $B\to D^*\ell\nu$ decays to measure model-independent observables for the determination of $|V_{cb}|$. The $B\to D^*\ell\nu$ decays is partially reconstructed, removing systematic uncertainty on $|V_{cb}|$ from the soft-pion reconstruction. By assuming equality of the semileptonic decay width of $B^0$ and $B^{+}$ mesons, we can also measure $f_{+-}/f_{00}$, the ratio of the branching fractions of $\Upsilon(4S)$ the decaying into charged and neutral $BB$ pairs. From the model-independent observables, $|V_{cb}|$ and the form-factor parameters of both decays can be determined a-posteriori assuming any form-factor model and lattice data inputs. Using simulation, we present the potential of this analysis with the current Belle II dataset. |
| Conference | 2024 Workshop on Challenges in Semileptonic B Decays |
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- BELLE2-TALK-CONF-2024-124.pdf (versions: 1)