| Experiment | Measurement [10-7] | $\Delta\chi^2$ | Reference | Comments |
|---|---|---|---|---|
| Average | $3.28 \pm0.32$ | 0.76 | $p=0.68$ (ndf=2) | Treatment of charmonium intermediate components differs between the results. |
| PDG | $3.29\,^{+0.63}_{-0.55}$ | pdgLive | ||
| LHCb | $3.27 \pm0.34 \pm0.17$ | 0.00 | JHEP 06,133 (2014) | Only muons are used. |
| BELLE | $3.51\,^{+0.69}_{-0.60} \pm0.10$ | 0.13 | JHEP 03,105 (2021) | |
| BaBar | $2.1\,^{+1.5}_{-1.3} \pm0.2$ | 0.63 | Phys.Rev.Lett. 102,091803 (2009) |