Experiment
Measurement
Reference
Belle
\([2.5 ^{+2.1}_{-1.6}\mbox{ (stat)}] \times 10^{-4}\)
PRL 91,262002 (2003)
Average
\(\mathbf{[2.5 ^{+2.1}_{-1.6}\mbox{ (combined)}] \times 10^{-4}}\)
