| Experiment | Measurement | Reference |
|---|---|---|
| Belle | \([1.85 \pm 0.29\mbox{ (stat)} \pm 0.35\mbox{ (syst)} ^{+0.00}_{-0.46}\mbox{ (model uncertainty)}] \times 10^{-4}\) | PRL 94 (2005) 221805 |
| Average | \(\mathbf{[1.85 ^{+0.45}_{-0.65}\mbox{ (combined)}] \times 10^{-4}}\) |