| Experiment | Measurement | Reference |
|---|---|---|
| CDF | \([6.9 \pm 1.8\mbox{ (stat)} \pm 1.2\mbox{ (syst)}] \times 10^{-4}\) | PRD 66 052005 (2002) |
| Belle | \([7.16 \pm 0.10\mbox{ (stat)} \pm 0.60\mbox{ (syst)}] \times 10^{-4}\) | PRD 83, 032005 (2011) |
| BaBar | \([11.6 \pm 0.7\mbox{ (stat)} \pm 0.9\mbox{ (syst)}] \times 10^{-4}\) | PRD 71 071103 (2005) |
| Average | \(\mathbf{[8.07 \pm 0.52\mbox{ (combined)}] \times 10^{-4}}\) |