| Experiment | Measurement | Reference |
|---|---|---|
| Belle | \([0.48 \pm 0.11\mbox{ (stat)} \pm 0.07\mbox{ (syst)}] \times 10^{-3}\) | PRL 93,051803(2004) |
| BaBar | \([3.5 \pm 2.5\mbox{ (stat)} \pm 0.3\mbox{ (syst)}] \times 10^{-4}\) | PRL 96 052002 (2006) |
| Average | \(\mathbf{[4.5 \pm 1.2\mbox{ (combined)}] \times 10^{-4}}\) |