Measurement of the branching fraction and $CP$-violating asymmetry of the decay $B^0\to {\pi }^0{\pi }^0$ using $387$ million bottom-antibottom meson pairs in Belle II data

Belle II Collaboration, I. Adachi, L. Aggarwal +437

We measure the branching fraction and $CP$-violating flavor-dependent rate asymmetry of $B^0\to {\pi }^0{\pi }^0$ decays reconstructed using the Belle II detector in an electron-…