Measurement of the semileptonic B0¯Dν branching fraction with fully reconstructed B meson decays and 34.6 fb1 of Belle~II data

Sumitted to PubDB: 2020-08-25

Category: Conference papers and plots, Visibility: Public

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Authors Kyle Amirie, Florian Bernlochner, Michael Eliachevitch, William Sutcliffe
Non-Belle II authors Racha Cheaib, Hannah Wakeling
Date Aug. 25, 2020
Belle II Number BELLE2-CONF-PH-2020-009
Abstract We present a first measurement of the B0¯Dν branching fraction using fully reconstructed B meson decays employing the Full Event Interpretation algorithm. Collision events corresponding to an integrated luminosity of \lumi are analyzed, which were recorded by the Belle~II detector operated at the SuperKEKB accelerator complex. We measure 4.51 \pm 0.41_{stat} \pm 0.27_{syst} \pm0.45_{\pi_s}, with the first and second error denoting the statistical and systematic uncertainty, respectively, and the third dominant uncertainty is from the slow pion reconstruction efficiency.

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