Measurement of the branching fraction, polarization, and time-dependent $CP$ asymmetry in $B^0\to \ddot{I}{}^{+}\ddot{I}{}^{-}$ decays and constraint on the CKM angle $\ddot{I}{•}_2$

Belle II Collaboration, I. Adachi, L. Aggarwal +377

We present a measurement of the branching fraction and fraction of longitudinal polarization of $B^0\to \ddot{I}{}^{+}\ddot{I}{}^{-}$ decays, which have two $\ddot{I}{€}^0$'s in the final state. We also meas…