Experiment	Measurement	Reference
LHCb	\([0.068 \pm 0.005\mbox{ (stat)} ^{+0.003}_{-0.002}\mbox{ (syst)}]\)	JHEP 2015 130
Average	\(\mathbf{[0.068 ^{+0.006}_{-0.005}\mbox{ (combined)}]}\)