| Experiment | Measurement | Reference |
|---|---|---|
| LHCb | \([0.594 \pm 0.006\mbox{ (stat)} \pm 0.016\mbox{ (syst)} \pm 0.015\mbox{ (R(psi))}] \times 10^{0}\) | Eur. Phys.J C72 (2012) 2118 |
| D0 | \([0.65 \pm 0.04\mbox{ (stat)} \pm 0.03\mbox{ (syst)} \pm 0.07\mbox{ (fragmentation)}] \times 10^{0}\) | PRD 79, 111102 (2009) |
| Average | \(\mathbf{[0.598 \pm 0.022\mbox{ (combined)}] \times 10^{0}}\) | CL=0.5291 |