| Experiment | Measurement [10-4] | $\Delta\chi^2$ | Reference | Comments |
|---|---|---|---|---|
| Average | $1.09 \pm0.21$ | 4.17 | $p=0.24$ (ndf=3) | The PDG uncertainty includes a scale factor. |
| PDG | $1.09\,^{+0.25}_{-0.24}$ | pdgLive | ||
| Belle | $0.72\,^{+0.27}_{-0.25} \pm0.11$ | 1.64 | Phys.Rev.Lett. 110,131801 (2013) | |
| Belle | $1.25 \pm0.28 \pm0.27$ | 0.16 | Phys.Rev.D 92,051102 (2015) | |
| BaBar | $1.83\,^{+0.53}_{-0.49} \pm0.24$ | 1.82 | Phys.Rev.D 88,031102 (2013) | |
| BaBar | $1.70 \pm0.80 \pm0.20$ | 0.54 | Phys.Rev.D 81,051101 (2010) |