Study of $B^+ \to μ^+ ν_μ$ decays at Belle and Belle II
Merna Abumusabh, Ichiro Adachi, K. Adamczyk, Agrim Aggarwal et autres
We report a measurement of the branching fraction for the leptonic decay $B^+\toμ^+ν_μ$. This work presents the first $B^+\toμ^+ν_μ$ result using Belle~II data, an updated Belle measurement that supersedes the previous result, and their combination, which yields the most precise search to …
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