# EPS-HEP2021 conference

26-30 July 2021
Zoom
Europe/Berlin timezone

## QCD factorization tests with $\bar{B^0} \to D^{(*)+}\pi^-$ and $\bar{B^0} \to D^{(*)+}K^-$ decays at Belle

26 Jul 2021, 10:00
15m
Zoom

#### Zoom

Parallel session talk Flavour Physics and CP Violation

### Speaker

Eiasha Waheed (High Energy Accelerator Research Organization (KEK))

### Description

We report new results of the branching fractions $\mathcal{B}(\bar{B}^0\to D^{*+}\pi^{-})$ and $\mathcal{B}(\bar{B}^0\to D^{*+}K^{-})$ measured using $772\times 10^{6}$ $B$-meson pairs recorded by the Belle experiment. The ratio of the branching fractions is measured in a way that allows for the cancellation of systematic uncertainties arising from the $D$-meson reconstruction. Furthermore, we report a new high-precision test of QCD factorisation by measuring ratios of $\bar{B}^0\to D^{*+}h^{-}$ $(h=\pi,K)$ and $\bar{B}^0\to D^{*+}\ell^{-}\bar{\nu}_{\ell}$ decays at fixed momentum transfers for different particle species. The talk also covers related measurements of $B \to D h$ decays performed with the full Belle data.

First author S. Nishida Belle shohei.nishida@kek.jp

### Primary author

Shohei Nishida (BELLE (BELLE II Experiment))