Table 1.

Summary of event selection requirements for signal events

Jet-based trigger

$\ge$ 6 jets with $p_{\mathrm{T}}>30\mathrm{GeV}$ and $|\mathit{\eta }|<2.5$

$\ge$ 5 jets with $p_{\mathrm{T}}>55\mathrm{GeV}$ and $|\mathit{\eta }|<2.5$

$\mathrm{\Delta }R>0.6$ between pairs of jets with $p_{\mathrm{T}}>30\mathrm{GeV}$

Jet vertex fraction JVF $>0.75$

Reject events w. isolated electrons with $E_{\mathrm{T}}>25\mathrm{GeV}$

Reject events w. isolated muons with $p_{\mathrm{T}}>20\mathrm{GeV}$

Exactly 2 $b$-tagged jets among the four leading jets

Missing transverse momentum significance

$E_{\mathrm{T}}^{\mathrm{miss}}[\mathrm{GeV}]/\sqrt{H_{\mathrm{T}}[\mathrm{GeV}]}<3$

Centrality $\mathcal{C}>0.6$