Experiment	Measurement	Reference
CDF	\([0.126 \pm 0.033\mbox{ (stat)} ^{+0.047}_{-0.038}\mbox{ (syst)}] \times 10^{0}\)	PRD 79, 032001 (2009)
Average	\(\mathbf{[0.126 ^{+0.057}_{-0.050}\mbox{ (combined)}] \times 10^{0}}\)