Experiment	Measurement	Reference
CDF	\([0.167 ^{+0.037}_{-0.025}\mbox{ (stat)} \pm 0.012\mbox{ (syst)}] \times 10^{0}\)	PRD 80, 072003 (2009)
Average	\(\mathbf{[0.167 ^{+0.039}_{-0.028}\mbox{ (combined)}] \times 10^{0}}\)