Experiment	Measurement	Reference
BaBar	\([15.4 \pm 1.8\mbox{ (stat)} \pm 0.3\mbox{ (syst)}] \times 10^{0}\)	PRD 78, 112003 (2008)
Average	\(\mathbf{[15.4 \pm 1.8\mbox{ (combined)}] \times 10^{0}}\)