| Experiment | Measurement | Reference |
|---|---|---|
| LHCb | \([1.43 \pm 0.16\mbox{ (stat)} \pm 0.13\mbox{ (syst)}] \times 10^{0}\) | PRD 84 092001 (2011), Erratum: PRD 85 039904 (2012) |
| CDF | \([3.04 \pm 0.33\mbox{ (stat)} ^{+0.70}_{-0.55}\mbox{ (syst)}] \times 10^{0}\) | PRD 85 032003 (2012) |
| Average | \(\mathbf{[1.55 \pm 0.20\mbox{ (combined)}] \times 10^{0}}\) | CL=0.0296 |