Experiment	Measurement	Reference
LHCb	\([0.578 \pm 0.035\mbox{ (stat)} \pm 0.027\mbox{ (syst)}]\)	Eur.Phys.J. C73 (2013) 2462
Average	\(\mathbf{[0.578 \pm 0.044\mbox{ (combined)}]}\)