"Figure 3b" of "Search for heavy resonances decaying into two Higgs bosons in the $\mathrm{b\bar{b}}τ^+τ^-$ final state in proton-proton collisions at $\sqrt{s}$ = 13 TeV"

Distribution of $M_{\mathrm{H}(\mathrm{b}\bar{\mathrm{b}})}$ obtained from the leading AK8 jet in the event after the full event selection for the $\ell\tau_{\mathrm{h}}$ channel. The signal-enriched region (SR) is defined as $100 < M_{\mathrm{H}(\mathrm{b}\bar{\mathrm{b}})} < 150\ \mathrm{GeV}$. The sideband (SB) is immediately adjacent to the SR, on either side. The data (solid circles) are compared to the background simulation (filled histograms), where the gray bands represent the total background uncertainty, obtained from the post-fit values of the dominant systematic uncertainties and the statistical uncertainties in the simulated samples. The $X\to HH$ signal simulation (solid red line) is overlaid and normalized to $\sigma(X\to HH)=0.1~\mathrm{pb}$ for illustration. The ratio between the data and the total expected background contribution is shown in the lower panel, where a solid black triangle indicates those bins where the ratio exceeds the axis range.