| Experiment | Measurement | Reference |
|---|---|---|
| Belle | \([6.62 ^{+1.30}_{-1.40}\mbox{ (stat)} \pm 0.70\mbox{ (syst)}] \times 10^{-6}\) | PRL 107, 091803 (2011) |
| BaBar | \([11.4 \pm 5.5\mbox{ (stat)} \pm 1.0\mbox{ (syst)}] \times 10^{-6}\) | PRL 102 132001 (2009) |
| Average | \(\mathbf{[6.95 \pm 1.47\mbox{ (combined)}] \times 10^{-6}}\) |