Experiment	Measurement	Reference
LHCb	\([0.047 \pm 0.010\mbox{ (stat)} \pm 0.004\mbox{ (syst)} \pm 0.002\mbox{ (PDG)}]\)	JHEP07(2014)140
Average	\(\mathbf{[0.047 \pm 0.011\mbox{ (combined)}]}\)