Experiment	Measurement	Reference
BaBar	\([0.67 \pm 0.20\mbox{ (stat)} \pm 0.11\mbox{ (syst)}] \times 10^{-2}\)	PRD 74 (2006) 031103
Average	\(\mathbf{[0.67 \pm 0.23\mbox{ (combined)}] \times 10^{-2}}\)