"Cross-section upper limit 9" of "Search for supersymmetry in final states with missing transverse momentum and charm-tagged jets using 139 fb$^{-1}$ of proton-proton collisions at $\sqrt{s}=$ 13 TeV with the ATLAS detector"

Expected upper limit on the cross-section $(+1\sigma)$ for $U(1)$ vector LQ models in the Yang-Mills coupling scenario with $\beta_{23}=1$, corresponding to a branching fraction $\mathcal{B}(\mathrm{vLQ}^\mathrm{u,YM}_{23}\rightarrow c\nu) = 0.5$.

在β₂₃=1的杨-米尔斯耦合（Yang-Mills coupling）场景下，U(1)矢量类夸克（Leptoquark，简称LQ）模型的截面（+1σ）预期上限，对应分支比（branching fraction）ℬ(vLQᵘ,YM₂₃→cν)=0.5。