${\cal{B}}( B^0 \to SP ) \times {\cal{B}}( S \to \mu^+ \mu^- ) \times {\cal{B}}( P \to \mu^+ \mu^- )$

ExperimentMeasurement [10-10]$\Delta\chi^2$ReferenceComments
Average$< 6.0$
PDG$< 6.0$pdgLive
LHCb$< 6$JHEP 03,001 (2017)The mass windows corresponding to $\phi$ and charmonium resonances decaying to $\mu \mu$ are vetoed.
At CL=95%.
Quoted upper limits are at 90% confidence level (CL), unless mentioned otherwise.