PoS - Proceedings of Science
Volume 414 - 41st International Conference on High Energy physics (ICHEP2022) - Quark and Lepton Flavour Physics
New results for semileptonic $B$ decays from Belle
M.T. Prim* and  On behalf of the BELLE Collaboration
Full text: pdf
Pre-published on: December 06, 2022
Published on: June 15, 2023
Though the Belle experiment has stopped data taking more than a decade ago, new results on semileptonic B meson decays are still being obtained. This is in part due to new experimental tools elaborated for Belle II applied to the Belle data set, such as the FEI (Full Event Interpretation) hadronic and semileptonic tag which enables new, more precise measurements of $B\to D^* \ell \nu$ and $B\to D^{(*)} \pi (\pi) \ell \nu$ ($\ell = e, \mu$). Improved analysis methods, such as data-driven background modelling and the determination of the CKM magnitude ratio $|V_{ub}| / |V_{cb}|$ allow to cancel experimental and theoretical systematics. The talk also covers other results on semileptonic B decay. All results in this talk are based on the full data set collected by the Belle experiment at the KEKB asymmetric-energy $e^+e^-$ collider.
DOI: https://doi.org/10.22323/1.414.0718
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