| Experiment | Measurement | Reference |
|---|---|---|
| Belle | \([4.59 \pm 0.72\mbox{ (stat)} \pm 0.56\mbox{ (syst)}] \times 10^{-4}\) | PRL 95, 041803 (2005) |
| BaBar | \([3.6 \pm 0.5\mbox{ (stat)} \pm 0.4\mbox{ (syst)} \pm 0.2\mbox{ (syst)}] \times 10^{-4}\) | PRD 73(2006) 112004 |
| Average | \(\mathbf{[3.85 \pm 0.46\mbox{ (combined)}] \times 10^{-4}}\) |