Experiment
Measurement
Reference
Belle
\([12.9 \pm 2.2\mbox{ (stat)} \pm 2.5\mbox{ (syst)}] \times 10^{-4}\)
PLB 542, 171 (2002)
Average
\(\mathbf{[12.9 \pm 3.3\mbox{ (combined)}] \times 10^{-4}}\)
