| Experiment | Measurement | Reference |
|---|---|---|
| Belle | \([7.5 \pm 0.2\mbox{ (stat)} \pm 0.8\mbox{ (syst)} \pm 0.8\mbox{ (brs)}] \times 10^{-3}\) | PRD 75, 091102 (2007) |
| BaBar | \([0.90 \pm 0.18\mbox{ (stat)} \pm 0.14\mbox{ (syst)}] \times 10^{-2}\) | PRD 74 (2006) 031103 |
| Average | \(\mathbf{[7.8 \pm 1.0\mbox{ (combined)}] \times 10^{-3}}\) |