"Aux. Fig. 8" of "Search for massive, long-lived particles in events with displaced vertices and displaced muons in $pp$ collisions at $\sqrt{s}=13.6$ TeV with the ATLAS experiment"

Overview of the analysis regions, binned in $m_{\mathrm{DV}}^{\mathrm{red}}$, the largest reduced mass of any DV in the event, using the same binning as in the statistical analysis. The predicted background yields are obtained via the transfer factor method from the zero-DV and material-map-vetoed DV selections, with additional muon selection criteria to enhance purity for each background. Good agreement is observed in all validation regions, except the far $n_{\mathrm{track}} \geq 4$, $m_{\mathrm{DV}} < 20\,\text{GeV}$ region. To account for this, an additional non-closure uncertainty is applied to the heavy-flavour estimate in that region and in $\text{SR}_{\mathrm{far}}$. The hatched band represents the total uncertainty in the prediction. The predictions are overlaid with one representative higgsino pair-production benchmark model, with $m = 1500\,\text{GeV}$ and $\tau = 0.1\,\text{ns}$, and $L$-violating decays via the $\lambda'_{211}$ coupling. The uncertainty band on the signal model includes statistical and systematic uncertainties.