Speaker
Description
Recent measurements of B to charm semileptonic decays show a difference between the branching ratio of the sum of exclusive decay rates and the inclusive $b \rightarrow cℓν$ decay rate (the so-called Semi-Leptonic (SL) gap) which affects the interpretation of the CKM element |Vcb|. Large contributions from not-yet measured $B \rightarrow D(∗)ηℓν$ decays could be the explanation of such difference. We present a sensitivity study of the $B \rightarrow D^{*}ηπ$ decay using the data sample collected by the Belle II experiment. This measurement will provide valuable information to predict its semileptonic counterpart $B \rightarrow D^{*}ηℓν$. If $B \rightarrow D^{*}ηπ$ decay is found to be large, it could contribute significantly to the hadronic B-tagging, and consequently enhance the sensitivity for searching rare B decays with missing energy.
| Session | Quark and Lepton Flavour Physics |
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