New results on inclusive $B\to X_{u} \ell \nu$ decay from the Belle experiment

TL;DR

This paper reports on the measurement of inclusive charmless semileptonic B decays using the full Belle dataset, providing new insights into the CKM matrix element |V_{ub}| through partial branching fractions.

Contribution

It presents the first measurement of inclusive $B o X_{u} \, \ell \, \nu$ decays using hadronic tagging on the full Belle dataset, improving precision in determining |V_{ub}|.

Findings

Measurement of partial branching fractions for $B \to X_{u} \ell \nu$

Preliminary determination of the CKM matrix element |V_{ub}|

Analysis based on 772 million $B\bar{B}$ pairs

Abstract

We report on the measurement of inclusive charmless semileptonic B decays $B \to X_{u} \ell \nu$. The analysis makes use of hadronic tagging and is performed on the full data set of the Belle experiment comprising 772 million $B\bar{B}$ pairs. In the proceedings, the preliminary results of measurements of partial branching fractions and the CKM matrix element $|V_{ub}|$ are presented.