| Experiment | Measurement | Reference |
|---|---|---|
| LHCb | \([2.52 ^{+0.46}_{-0.32}\mbox{ (stat)} ^{+0.27}_{-0.33}\mbox{ (syst)}] \times 10^{-1}\) | PLB 698, 115 (2011) |
| D0 | \([0.275 \pm 0.041\mbox{ (stat)} \pm 0.061\mbox{ (syst)}] \times 10^{0}\) | PRD 85, 011103 (2012) |
| Average | \(\mathbf{[2.59 \pm 0.41\mbox{ (combined)}] \times 10^{-1}}\) |