| Experiment | Measurement | Reference |
|---|---|---|
| LHCb | \([0.489 \pm 0.026\mbox{ (stat)} \pm 0.021\mbox{ (syst)} \pm 0.012\mbox{ (R(psi))}] \times 10^{0}\) | Eur. Phys.J C72 (2012) 2118 |
| D0 | \([0.55 \pm 0.11\mbox{ (stat)} \pm 0.07\mbox{ (syst)} \pm 0.06\mbox{ (fragmentation)}] \times 10^{0}\) | PRD 79, 111102 (2009) |
| CDF | \([0.52 \pm 0.13\mbox{ (stat)} \pm 0.07\mbox{ (syst)}] \times 10^{0}\) | RL 96 231801 (2006) |
| Average | \(\mathbf{[0.494 \pm 0.034\mbox{ (combined)}] \times 10^{0}}\) | CL=0.9035 |