000004538 001__ 4538
000004538 005__ 20241008094559.0
000004538 037__ $$aBELLE2-TALK-CONF-2024-124
000004538 041__ $$aeng
000004538 088__ $$aBELLE2-TALK-DRAFT-2024-128
000004538 100__ $$aMichele Mantovano
000004538 245__ $$aSimultaneous analysis of B->Dlnu and B->D*lnu to improve the determination of |Vcb|
000004538 260__ $$a2024 Workshop on Challenges in Semileptonic B Decays$$c2024-09-23
000004538 300__ $$amult. p
000004538 520__ $$aWe propose a simultaneous analysis of $B\to D\ell\nu$ and $B\to D^*\ell\nu$ decays to measure model-independent observables for the determination of $|V_{cb}|$. The $B\to D^*\ell\nu$ decays is partially reconstructed, removing systematic uncertainty on $|V_{cb}|$ from the soft-pion reconstruction. By assuming equality of the semileptonic decay width of $B^0$ and $B^{+}$ mesons, we can also measure $f_{+-}/f_{00}$, the ratio of the branching fractions of $\Upsilon(4S)$ the decaying into charged and neutral $BB$ pairs. From the model-independent observables, $|V_{cb}|$ and the form-factor parameters of both decays can be determined a-posteriori assuming any form-factor model and lattice data inputs. Using simulation, we present the potential of this analysis with the current Belle II dataset.
000004538 8560_ $$fdjaffe@bnl.gov
000004538 8564_ $$uhttps://docs.belle2.org/record/4538/files/BELLE2-TALK-CONF-2024-124.pdf