| Experiment | Measurement | Reference |
|---|---|---|
| Belle | \([0.074 \pm 0.015\mbox{ (stat)} \pm 0.006\mbox{ (syst)}]\) | PRL 87, 111801 (2001) |
| BaBar | \([7.76 \pm 0.34\mbox{ (stat)} \pm 0.29\mbox{ (syst)}] \times 10^{-2}\) | PRL 96 011803 (2006) |
| Average | \(\mathbf{[7.73 \pm 0.43\mbox{ (combined)}] \times 10^{-2}}\) |