| Experiment | Measurement [10-6] | $\Delta\chi^2$ | Reference | Comments |
|---|
| Average | $5.84 \pm0.69$ | 3.22 | $p=0.073$ (ndf=1) | Belle uses $m_{\ell^+\ell^-} > 0.2~\text{GeV}/c^2$, BABAR uses $m_{\ell^+\ell^-} > 0.1 ~\text{GeV}/c^2$. The PDG uncertainty includes a scale factor. Treatment of charmonium intermediate components differs between the results. |
| PDG | $5.84\,^{+1.31}_{-1.23}$ | | pdgLive | |
| BaBar | $6.73\,^{+0.70}_{-0.64}\,^{+0.60}_{-0.56}$ | 1.09 |
Phys.Rev.Lett. 112,211802 (2014) | Multiple systematic uncertainties are added in quadrature. |
| Belle | $4.11 \pm0.83\,^{+0.85}_{-0.81}$ | 2.13 |
Phys.Rev.D 72,092005 (2005) | |
