Experiment	Measurement	Reference
CDF	\([3.5 \pm 0.6\mbox{ (stat)} \pm 0.4\mbox{ (syst)} \pm 0.4\mbox{ (frag)} \pm 0.1\mbox{ (norm)}] \times 10^{-5}\)	PRD 83, 052012 (2011)
Average	\(\mathbf{[3.5 \pm 0.8\mbox{ (combined)}] \times 10^{-5}}\)