| Experiment | Measurement | Reference |
|---|---|---|
| Belle | \([1.94 ^{+0.09}_{-0.08}\mbox{ (stat)} ^{+0.20}_{-0.20}\mbox{ (syst)} \pm 0.17\mbox{ (intermediate Brs)}] \times 10^{-4}\) | PRD 80, 052005 (2009) |
| BaBar | \([2.02 \pm 0.13\mbox{ (stat)} \pm 0.38\mbox{ (syst)} \pm 0.06\mbox{ (corr. syst.)}] \times 10^{-4}\) | PRL 100 171803 (2008) |
| Average | \(\mathbf{[1.97 \pm 0.23\mbox{ (combined)}] \times 10^{-4}}\) |