| Experiment | Measurement [10-6] | $\Delta\chi^2$ | Reference | Comments |
|---|
| Average | $4.98 \pm0.52$ | 5.49 | $p=0.019$ (ndf=1) | The PDG uncertainty includes a scale factor.
|
| PDG | $4.22\,^{+0.82}_{-0.79}$ | | pdgLive | |
| BaBar | $5.6 \pm0.5 \pm0.3$ | 1.14 |
Phys.Rev.D 84,012001 (2011) | Measured in the $\phi \phi$ invariant mass range below the $\eta_c$ resonance ($M_{\phi \phi} < 2.85~\text{GeV}/c^2$).
|
| Belle | $2.6\,^{+1.1}_{-0.9} \pm0.3$ | 4.35 |
Phys.Rev.Lett. 91,241802 (2003) | Measured in the $\phi \phi$ invariant mass range below the $\eta_c$ resonance ($M_{\phi \phi} < 2.85~\text{GeV}/c^2$).
|
