| Experiment | Measurement [10-6] | $\Delta\chi^2$ | Reference | Comments |
|---|---|---|---|---|
| Average | $5.3\,^{+1.4}_{-1.0}$ | |||
| PDG | $5.3\,^{+1.5}_{-1.1}$ | pdgLive | ||
| BaBar | $5.3 \pm0.7\,^{+1.3}_{-0.8}$ | 0.00 | Phys.Rev.D 79,072006 (2009) | The nonresonant amplitude is modelled using a sum of exponential functions. Multiple systematic uncertainties are added in quadrature. |