Experiment
Measurement
Reference
Belle
\([3.1 ^{+2.7}_{-2.3}\mbox{ (stat)}] \times 10^{-4}\)
PRL 91,262002 (2003)
Average
\(\mathbf{[3.1 ^{+2.7}_{-2.3}\mbox{ (combined)}] \times 10^{-4}}\)
