| Experiment | Measurement | Reference |
|---|---|---|
| CDF | \([11.5 \pm 2.3\mbox{ (stat)} \pm 1.7\mbox{ (syst)}] \times 10^{-4}\) | PRL 76 2015 (1996) |
| Belle | \([7.9 \pm 0.4\mbox{ (stat)} \pm 0.9\mbox{ (syst)} \pm 0.1\mbox{ (psi br (correlated))}] \times 10^{-4}\) | PRD 67, 032003(2003) |
| BaBar | \([8.69 \pm 0.22\mbox{ (stat)} \pm 0.26\mbox{ (syst)} \pm 0.15\mbox{ (jpsi br (correlated))}] \times 10^{-4}\) | PRL 94 141801 (2005) |
| Average | \(\mathbf{[8.63 \pm 0.35\mbox{ (combined)}] \times 10^{-4}}\) |