ExperimentMeasurementReference
Belle\([1.23 \pm 0.23\mbox{ (stat)} ^{+0.12}_{-0.16}\mbox{ (syst)} \pm 0.38\mbox{ (etac br (correlated))}] \times 10^{-3}\)PRL 90, 071801(2003)
BaBar\([0.64 ^{+0.22}_{-0.20}\mbox{ (stat)} \pm 0.04\mbox{ (syst)} ^{+0.28}_{-0.15}\mbox{ (br)}] \times 10^{-3}\)PRD 76 092004 (2007)
BaBar\([11.4 \pm 1.5\mbox{ (stat)} \pm 1.2\mbox{ (syst)} \pm 3.2\mbox{ (etac br (correlated))}] \times 10^{-4}\)PRD 70 011101 (2004)
Average \(\mathbf{[8.5 \pm 2.4\mbox{ (combined)}] \times 10^{-4}}\)