Experiment	Measurement	Reference
BaBar	\([3.2 \pm 0.1\mbox{ (stat)} ^{+0.6}_{-0.3}\mbox{ (syst)}] \times 10^{-4}\)	PRD(RC) 82 011101 (2010)
Average	\(\mathbf{[3.2 ^{+0.6}_{-0.3}\mbox{ (combined)}] \times 10^{-4}}\)