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Volume 291 - 9th International Workshop on the CKM Unitarity Triangle (CKM2016) - WG 2 Parallel
Experimental mini-review on exclusive $V_{ub}$ (Belle II)
M. Lubej* On behalf of the BELLE II collaboration
*corresponding author
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Pre-published on: 2017-06-05 16:37:27
Published on: 2017-06-13 17:09:14
Abstract
We give a short overview of existing branching fraction measurements of charmless semileptonic $B$ meson decays of the form $B \to X_u \ell \nu$, with $X_u$ being $\pi,~\rho,~\omega,~\eta$ or $\eta'$. We focus on results from Belle and BaBar collaborations. We report prospects for measurements and estimates for $\vert V_{ub} \vert$ determinations in $B \to \pi \ell \nu$ decays at Belle II. With the full expected Belle II dataset, $50~{\rm ab}^{-1}$ of integrated luminosity, the estimated errors on $\vert V_{ub} \vert$, including expected improvements in Lattice QCD calculations in the next decade, are $1.7~\%$ and $1.3~\%$ obtained with the tagged and untagged method of companion $B$ meson reconstruction, respectively.
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