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

ExperimentMeasurement [10-7]$\Delta\chi^2$ReferenceComments
Average$< 8.6$
PDG$< 8.6$pdgLive
Belle$< 8.6$Phys.Rev.D 101,032007 (2020)
BaBar$< 10$Phys.Rev.D 79,091101 (2009)
Belle$< 10.7$Phys.Rev.Lett. 121,031801 (2018)
Quoted upper limits are at 90% confidence level (CL), unless mentioned otherwise.