${\cal B}(B_s^0 \to \eta \eta)$
Experiment
Measurement [10
-4
]
$\Delta\chi^2$
Reference
Comments
Average
$< 1.4$
PDG
$< 1.4$
pdgLive
Belle
$< 1.44$ using $f_{s}$
Phys.Rev.D
105
,012007 (2022)
Input values that appear in red are not included in the PDG average.
Quoted upper limits are at 90% confidence level (CL), unless mentioned otherwise.
