Rediscovery of $B^0\to J/\psi K_L^0$ at Belle II

Belle II Collaboration, F. Abudinén, I. Adachi +545

We present preliminary results on the reconstruction of the $B^0\to J/\psi K_L^0$ decay, where $J/\psi \to {\mu }^{+}{\mu }^{-}$ or $e^+e…