"Fig. 4" 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 with varying displaced vertex (DV) selection criteria. 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 the 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. 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 lepton-number-violating decays via the $\lambda'_{211}$ coupling. The uncertainty in the signal prediction includes statistical and systematic uncertainties.