Experiment	Measurement	Reference
LHCb	\([20.2 \pm 4.3\mbox{ (stat)} \pm 1.7\mbox{ (syst)} \pm 0.8\mbox{ (PDG)}] \times 10^{-6}\)	JHEP07(2014)140
Average	\(\mathbf{[20.2 \pm 4.7\mbox{ (combined)}] \times 10^{-6}}\)