| Experiment | Measurement | Reference |
|---|---|---|
| BaBar | \([0.57 \pm 0.16\mbox{ (stat)} \pm 0.09\mbox{ (syst)}] \times 10^{-2}\) | PRD 74 (2006) 031103 |
| BaBar | \([1.03 \pm 0.14\mbox{ (stat)} \pm 0.13\mbox{ (syst)} \pm 0.26\mbox{ (correlated systematic)}] \times 10^{-2}\) | PRD 67, 092003 (2003) |
| Average | \(\mathbf{[0.68 \pm 0.16\mbox{ (combined)}] \times 10^{-2}}\) |