000002082 001__ 2082
000002082 005__ 20200805061226.0
000002082 037__ $$aBELLE2-CONF-PH-2020-007
000002082 041__ $$aeng
000002082 100__ $$aNadia Toutounji
000002082 245__ $$aExclusive $B^0 \to \pi^- \ell^+ \nu_\ell$ Decays with Hadronic Full Event Interpretation Tagging in 34.6\invfb of Belle II Data
000002082 260__ $$a$$c2020-08-05
000002082 300__ $$amult. p
000002082 520__ $$aWe present the results of the re-discovery of the decay $B^0 \to \pi^- \ell^+ \nu_\ell$ in 34.6\invfb of Belle II data using hadronic $B$-tagging via the Full Event Interpretation algorithm. We observe 21 signal events on a background of 155 in a fit to the distribution of the square of the missing mass, $M_{\mathrm{miss}}^2$, with a significance of 5.69$\sigma$, and determine a total branching fraction of (1.58 $\pm$ 0.43$_{\mathrm{stat}}$ $\pm$ 0.07$_{\mathrm{sys}}$) $\times 10^{-4}$
000002082 700__ $$aKevin Varvell
000002082 700__ $$aMoritz Bauer
000002082 700__ $$aPablo Goldenzweig
000002082 8560_ $$fnadia.ejlal.toutounji@desy.de
000002082 8564_ $$uhttps://docs.belle2.org/record/2082/files/BELLE2-CONF-PH-2020-007.pdf