000001799 001__ 1799
000001799 005__ 20191224102009.0
000001799 037__ $$aBELLE2-CONF-PROC-2019-018
000001799 041__ $$aeng
000001799 100__ $$aAndrea Fodor
000001799 245__ $$aSemileptonic B decay results from early Belle II data
000001799 260__ $$a$$c2019-10-29
000001799 300__ $$amult. p
000001799 520__ $$aThe Belle II experiment at the SuperKEKB energy-asymmetric $e^+ e^-$ collider is a substantial upgrade of the B factory facility, Belle, at the Japanese KEK laboratory. %The design luminosity of the machine is $8\times 10^{35}$ cm$^{-2}$s$^{-1}$ and the Belle II experiment aims to record 50 ab$^{-1}$ of data, a factor of 50 more than its predecessor.  The main operation of SuperKEKB has started in March 2019, and collisions ran until July 2019, achieving a peak luminosity of $5.5\times 10^{33}$ cm$^{-2}$s$^{-1}$. The results presented here were obtained from a subset of collected data of 0.41~fb$^{-1}$. In the poster presented at the conference the first results from studying semileptonic $\textit{B}$-meson decays were shown. The performance of the Full Event Interpretation (FEI) tagging was analysed. The $B^0 \rightarrow D^{*-} \ell^+ \nu_{\ell}$ mode was rediscovered, using the untagged approach. 
000001799 8560_ $$fandrea.fodor@desy.de
000001799 8564_ $$uhttps://docs.belle2.org/record/1799/files/BELLE2-CONF-PROC-2019-018.pdf