| Experiment | Measurement | Reference |
|---|---|---|
| LHCb | \([3.88 \pm 0.11\mbox{ (stat)} \pm 0.15\mbox{ (syst)}] \times 10^{-5}\) | PRD 85, 091105(R) (2012) |
| Belle | \([0.38 \pm 0.06\mbox{ (stat)} \pm 0.03\mbox{ (syst)}] \times 10^{-4}\) | PRD 67, 032003(2003) |
| BaBar | \([0.537 \pm 0.045\mbox{ (stat)} \pm 0.024\mbox{ (syst)}] \times 10^{-4}\) | PRL 92 241802 (2004) |
| Average | \(\mathbf{[4.04 \pm 0.17\mbox{ (combined)}] \times 10^{-5}}\) | CL=0.0216 |