Observation of time-dependent CP violation and measurement of the branching fraction of B0→J/ψπ0 decays
H. Aihara, Alberto Aloisio, S. Bettarini, D. Bodrov et autres
We present a measurement of the branching fraction and time-dependent charge-parity ( CP ) decay-rate asymmetries in B0→J/ψπ0 decays. The data sample was collected with the Belle II detector at the SuperKEKB asymmetric e+e− collider in 2019–2022 and contains (387±6)×106 BB¯ meson …