${\cal B}(B_s^0 \to \eta^\prime K^0_S)$
| Experiment | Measurement [10-6] | $\Delta\chi^2$ | Reference | Comments |
|---|
| Average | $< 8.2$ | | | |
| Belle | $< 8.16$ using $f_{s}$ | | arXiv:2201.01851 | |
Input values in blue correspond to yet unpublished results.
Quoted upper limits are at 90% confidence level (CL), unless mentioned otherwise.