Measurement of the branching fraction of the $\hat{I}{›}_b^0\to J/\ddot{I}ˆ\hat{I}›$ decay and isospin asymmetry of $B\to J/\ddot{I}ˆK$ decays

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1193

This paper describes a measurement of the $\hat{I}{›}_b^0\to J/\ddot{I}ˆ\hat{I}›$ branching fraction using data collected with the LHCb experiment in proton-proton collisions from 2016 to 2018. The dat…