Experiment	Measurement	Reference
Belle	\([2.67 \pm 0.14\mbox{ (stat)} ^{+0.29}_{-0.26}\mbox{ (syst)} \pm 0.49\mbox{ (model)}] \times 10^{-7}\)	PLB 706 (2011)
Average	\(\mathbf{[2.67 ^{+0.59}_{-0.57}\mbox{ (combined)}] \times 10^{-7}}\)