000001081 001__ 1081
000001081 005__ 20180807065350.0
000001081 037__ $$aBELLE2-TALK-CONF-2018-096
000001081 041__ $$aeng
000001081 088__ $$aBELLE2-TALK-DRAFT-2018-079
000001081 100__ $$aAbi Soffer
000001081 245__ $$aImproved studies of B->D(*) tau nu with vertexing at Belle II
000001081 260__ $$aICHEP2018$$c2018-07-07
000001081 300__ $$amult. p
000001081 500__ $$a15' including questions 
000001081 520__ $$aBABAR, Belle, and LHCb measure the rates for the decays B→D(∗)τν and Bc→J/ψτν to be higher than the SM expectations, with a combined discrepancy of 4.1σ (for B→D(∗)τν only) or ∼4.3σ (including all modes). In the coming years, Belle II and LHCb will greatly improve the measurement precision, to the level that systematic uncertainties associated with the background B→D∗∗ℓν become critical. We show how to utilize Belle II's high spatial resolution to obtain a model-independent handle on this background and improve the overall signal-backgroud. We also study the impact of vertexing on Belle II’s capability to perform this measurement with the decay τ→3πν, as already demonstrated by LHCb.
000001081 8560_ $$fdoris.yangsoo.kim@desy.de
000001081 8564_ $$uhttps://docs.belle2.org/record/1081/files/BELLE2-TALK-CONF-2018-096.pdf