${\cal B}(B^0 \to \mu^+ \mu^-)$

ExperimentMeasurement [10-10]$\Delta\chi^2$ReferenceComments
Average$< 1.5$
PDG$0.7\,^{+1.3}_{-1.1}$pdgLive
CMS$< 1.5$ICHEP2022
ATLAS$< 2.1$JHEP 04,098 (2019)At CL=95%.
LHCb$< 2.3$Phys.Rev.D 105,012010 (2022)
CDF$< 38$Phys.Rev.D 87,072003 (2013)
BaBar$< 520$Phys.Rev.D 77,032007 (2008)
Belle$< 1600$Phys.Rev.D 68,111101 (2003)
Input values that appear in red are not included in the PDG average.
Input values in blue correspond to yet unpublished results.
Quoted upper limits are at 90% confidence level (CL), unless mentioned otherwise.