Experiment	Measurement	Reference
BaBar	\([0.77 \pm 0.22\mbox{ (stat)} \pm 0.29\mbox{ (syst)}] \times 10^{0}\)	PRD 74 111102 (2006)
Average	\(\mathbf{[0.77 \pm 0.36\mbox{ (combined)}] \times 10^{0}}\)