Experiment
Measurement
Reference
BaBar
\([4.6 \pm 0.7\mbox{ (stat)} \pm 0.6\mbox{ (syst)}] \times 10^{-5}\)
PRL 90 091801 (2003) (superseded)
BaBar
< \(1.2 \times 10^{-5}\)
PRD 76 031101 (2007)
Average
< \(\mathbf{1.2 \times 10^{-5}}\)
