000003439 001__ 3439
000003439 005__ 20230301151649.0
000003439 037__ $$aBELLE2-TALK-CONF-2023-014
000003439 041__ $$aeng
000003439 088__ $$aBELLE2-TALK-DRAFT-2023-006
000003439 100__ $$aQi-Dong Zhou
000003439 245__ $$aR(D*) at Belle II
000003439 260__ $$a7th KEK Flavour-Factory Workshop$$c2023-02-09
000003439 300__ $$amult. p
000003439 520__ $$aMeasurement of branching ratio $R(D^{*})$ of $B \rightarrow D^{*} \tau \nu_{\tau}$ relative to $B \rightarrow D^{*} \ell \nu_{\ell}$ decays with hadronic tagging is performed by using data sample of $198 \times 10^{6}$ $B\bar{B}$ pairs collected at the $\Upsilon(4S)$ resonance with the Belle~II detector at the SuperKEKB asymmetric-energy $e^{+}e^{-}$ collider. The analysis uses hadronic reconstruction of the tag-side $B$ meson based on Full Event Interpretation technique and purely leptonic $\tau$ decays on signal-side $B$ meson. We will report the methodology and expected sensitivity, as well as part of the expected systematic uncertainty.  language:
000003439 8560_ $$fdjaffe@bnl.gov
000003439 8564_ $$uhttps://docs.belle2.org/record/3439/files/BELLE2-TALK-CONF-2023-014.pdf