| Experiment | Measurement | Reference |
|---|---|---|
| LHCb | \([4.4 ^{+0.5}_{-0.4}\mbox{ (stat)} \pm 0.8\mbox{ (syst)}] \times 10^{-5}\) | PRD 86, 071102(R) (2012) |
| CDF | \([8.3 \pm 1.2\mbox{ (stat)} \pm 3.4\mbox{ (syst)} \pm 1.0\mbox{ (frag)} \pm 0.4\mbox{ (norm)}] \times 10^{-5}\) | PRD 83, 052012 (2011) |
| Average | \(\mathbf{[4.6 \pm 0.9\mbox{ (combined)}] \times 10^{-5}}\) |