| Experiment | Measurement | Reference |
|---|---|---|
| Belle | \([1.47 ^{+0.15}_{-0.14}\mbox{ (stat)} ^{+0.19}_{-0.19}\mbox{ (syst)} \pm 0.13\mbox{ (intermediate BRs)}] \times 10^{-4}\) | PRD 80, 052005 (2009) |
| BaBar | \([1.67 \pm 0.16\mbox{ (stat)} \pm 0.35\mbox{ (syst)} \pm 0.05\mbox{ (corr. syst.)}] \times 10^{-4}\) | PRL 100 171803 (2008) |
| Average | \(\mathbf{[1.54 \pm 0.22\mbox{ (combined)}] \times 10^{-4}}\) |