Rediscovery of $B\to \varphi K^{(\ast )}$ decays and measurement of the longitudinal polarization fraction $f_L$ in $B\to \varphi K^{\ast }$ decays using the Summer 2020 Belle II dataset

F. Abudinén, I. Adachi, R. Adak +538

We utilize a sample of 34.6 fb${}^{-1}$, collected by the Belle II experiment at the SuperKEKB asymmetric energy $e^{+}{e}^{-}$ collider, to search for the $B^{+}\to \varphi K^{+}$, $B^+ \to ϕK^{*+}…