Experiment	Measurement	Reference
Belle	\([8.2 ^{+2.2}_{-1.9}\mbox{ (stat)} \pm 2.5\mbox{ (syst)}] \times 10^{-4}\)	PRL 91,262002 (2003)
BaBar	\([0.8 \pm 0.2\mbox{ (stat)} \pm 0.1\mbox{ (syst)} ^{+0.3}_{-0.2}\mbox{ (correlated systematic)}] \times 10^{-3}\)	PRL 93,181801 (2004)
Average	\(\mathbf{[8.1 \pm 2.3\mbox{ (combined)}] \times 10^{-4}}\)