Observation of $CP$ violation in $B^0\to J/\ddot{I}ˆ\ddot{I}(770{)}^0$ decays

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1172

The LHCb collaboration measures the time‑dependent CP asymmetry in B⁰ → J/ψ ρ⁰ decays, reporting the first observation of CP violation in this channel and determining the effective…