Experiment
Measurement
Reference
Belle
\([2.7 ^{+2.9}_{-2.2}\mbox{ (stat)}] \times 10^{-4}\)
PRL 91,262002 (2003)
Average
\(\mathbf{[2.7 ^{+2.9}_{-2.2}\mbox{ (combined)}] \times 10^{-4}}\)
