Measurement of the branching fraction of the ${\Lambda }_b^0\to J/\psi \Lambda$ decay and isospin asymmetry of $B\to J/\psi K$ decays

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

This paper describes a measurement of the ${\Lambda }_b^0\to J/\psi \Lambda$ branching fraction using data collected with the LHCb experiment in proton-proton collisions from 2016 to 2018. The datase…