"Figure 11 (bottom right)" of "Search for light pseudoscalar boson pairs produced from Higgs boson decays using the 4$τ$ and 2$μ$2$τ$ final states in proton-proton collisions at $\sqrt{s}$ = 13 TeV"

The observed and expected 95% CL upper limits on $\sigma (\mathrm{pp} \to \mathrm{H}+\text{X}) {\mathcal{B}} (\mathrm{H} \to \mathrm{a}1,\mathrm{a}1)$, relative to $\sigma\text{SM}$, as a function of $\tan\beta$ for the Type II 2HD+S model for $m{\mathrm{a}_1} = 15$ GeV.