Determination of $|V_{ub}|$ at Belle II

Abstract

Semileptonic $B$ meson decays involving low-mass charged leptons $e$ or $\mu$ are expected to be free of non-Standard Model contributions and therefore play a critical role in determinations of $|V_{ub}|$ and $|V_{cb}|$. Of all the CKM matrix parameters, $|V_{ub}|$ is the least precisely measured and in most need of additional studies in order to better constrain the apex of the Unitarity Triangle. We focus on exclusive reconstruction of charmless semileptonic $B$ meson decay $B\to \pi \ell \nu$, and present prospects and estimates for measuring $|V_{ub}|$ at Belle II with the full planned dataset of $50{\mathrm{ab}}^{-1}$ of integrated luminosity.

4 pages, 4 figures. To be published in the proceedings of Rencontres de Moriond EW 2017, La Thuile, Italy, 18-25 March 2017

References in corpus (1)

• Review of lattice results concerning low energy particle physics