| Experiment | Measurement | Reference |
|---|---|---|
| Belle | \([8.13 \pm 0.77\mbox{ (stat)} \pm 0.89\mbox{ (syst)}] \times 10^{-4}\) | Experiment Note |
| BaBar | \([5.92 \pm 0.85\mbox{ (stat)} \pm 0.86\mbox{ (syst)} \pm 0.22\mbox{ (psi(2S) br (correlated))}] \times 10^{-4}\) | PRL 94 141801 (2005) |
| Average | \(\mathbf{[7.07 \pm 0.85\mbox{ (combined)}] \times 10^{-4}}\) |