Experiment
Measurement
Reference
Belle
\([8.8 \pm 1.1\mbox{ (stat)} \pm 1.5\mbox{ (syst)}] \times 10^{-4}\)
PLB 542, 171 (2002)
Average
\(\mathbf{[8.8 \pm 1.9\mbox{ (combined)}] \times 10^{-4}}\)
