Reconstruction of $B\to \rho \ell {\nu }_{\ell }$ decays identified using hadronic decays of the recoil $B$ meson in 2019 -- 2021 Belle II data

Belle II Collaboration, F. Abudinén, I. Adachi +580

We present results on the semileptonic decays $B^0\to {\rho }^{-}{\ell }^{+}{\nu }_{\ell }$ and $B^{+}\to {\rho }^0{\ell }^{+}{\nu }_{\ell }$ in a sample corresponding to 189.9/fb of Belle II data at the SuperKEKB $e…