Experiment	Measurement	Reference
Belle	\([7.5 \pm 1.3\mbox{ (stat)} \pm 1.1\mbox{ (syst)}] \times 10^{-4}\)	PLB 542, 171 (2002)
Average	\(\mathbf{[7.5 \pm 1.7\mbox{ (combined)}] \times 10^{-4}}\)