| Experiment | Measurement [10-5] | $\Delta\chi^2$ | Reference | Comments |
|---|---|---|---|---|
| Average | $2.352 \pm0.072$ | 4.32 | $p=0.50$ (ndf=5) | The PDG average is a result of a fit including input from other measurements. |
| PDG | $2.368 \pm0.076$ | pdgLive | ||
| Belle | $2.397 \pm0.053 \pm0.071$ | 0.25 | Phys.Rev.D 87,031103 (2013) | |
| BaBar | $2.39 \pm0.11 \pm0.10$ | 0.06 | Phys.Rev.Lett. 97,171805 (2006) | |
| Belle II | $2.14\,^{+0.23}_{-0.22} \pm0.16$ | 0.58 | arXiv:2106.03766 | |
| CLEO | $1.88\,^{+0.37}_{-0.33}\,^{+0.21}_{-0.18}$ | 1.23 | Phys.Rev.D 68,052002 (2003) | |
| LHCb | ${\cal B}(B^+ \to K^+ \bar{K}^0) / {\cal B}(B^+ \to K^0 \pi^+)$ | 0.72 | Phys.Lett.B 726,646 (2013) |
| Source | Parameter | Correlation [%] | Value | $\Delta\chi^2$ |
|---|---|---|---|---|
| fit | ${\cal B}(B^+ \to K^+ \bar{K}^0)$ | 9.0 | $1.31 \pm0.14 \times 10^{-6}$ |