| Experiment | Measurement | Reference |
|---|---|---|
| LHCb | \([2.64 \pm 0.27\mbox{ (stat)} \pm 0.24\mbox{ (syst)}] \times 10^{-1}\) | PRL 108, 151801 (2012) |
| D0 | \([0.19 \pm 0.05\mbox{ (stat)} \pm 0.04\mbox{ (syst)}] \times 10^{0}\) | PRD 86, 092011 (2012) |
| Average | \(\mathbf{[2.46 \pm 0.31\mbox{ (combined)}] \times 10^{-1}}\) | CL=0.3142 |