First decay-time-dependent analysis of $B^{0} \to K_{S}^{0} π^{0}$ at Belle II
Belle II Collaboration, F. Abudinén, I. Adachi, R. Adak et autres
We report measurements of the branching fraction ($\mathcal{B}$) and direct $CP$-violating asymmetry ($A_{CP}$) of the charmless decay $B^{0} \to K^0 π^0$ at Belle II. A sample of $e^{+} e^{-}$ collisions, corresponding to $189.8 fb^{-1}$ of integrated luminosity, recorded at the $Υ(4S)$ resonance …