| Experiment | Measurement | Reference |
|---|---|---|
| LHCb | \([0.71 \pm 0.20\mbox{ (stat)} \pm 0.07\mbox{ (syst)}] \times 10^{0}\) | LHCb (superseded) |
| LHCb | \([0.578 \pm 0.035\mbox{ (stat)} \pm 0.027\mbox{ (syst)}]\) | Eur.Phys.J. C73 (2013) 2462 |
| Average | \(\mathbf{[0.578 \pm 0.044\mbox{ (combined)}]}\) |