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

ExperimentMeasurement [10-6]$\Delta\chi^2$ReferenceComments
Average$< 3.4$
PDG$< 3.4$pdgLive
Belle$< 3.4$Phys.Rev.D 98,112016 (2018) $E_\gamma > 1~\text{GeV}$.
BaBar$< 26.0$Phys.Rev.D 80,111105 (2009)
Quoted upper limits are at 90% confidence level (CL), unless mentioned otherwise.