| Experiment | Measurement | Reference |
|---|---|---|
| Belle | \([6.81 \pm 0.23\mbox{ (stat)} \pm 0.72\mbox{ (syst)}] \times 10^{-3}\) | PRD (R)70,111103(2004) |
| BaBar | \([7.26 \pm 0.11\mbox{ (stat)} \pm 0.30\mbox{ (syst)} \pm 0.09\mbox{ (correlated syst)}] \times 10^{-3}\) | PRD 94, 091101 (2016) |
| Average | \(\mathbf{[7.19 \pm 0.30\mbox{ (combined)}] \times 10^{-3}}\) | CL=0.5857 |