Experiment	Measurement	Reference
Belle	\([8.5 ^{+1.3}_{-1.2}\mbox{ (stat)} \pm 1.1\mbox{ (syst)} \pm 1.3\mbox{ (fs)}] \times 10^{-3}\)	PRL 104, 231801 (2010)
Average	\(\mathbf{[8.5 ^{+2.1}_{-2.1}\mbox{ (combined)}] \times 10^{-3}}\)