"Figure 4(a)" of "Search for charged-lepton-flavour violating $\mu\tau qt$ interactions in top-quark production and decay in $pp$ collisions at $\sqrt{s}= 13$ TeV with the ATLAS detector at the LHC"

Observed event yields in $\textrm{CR}t\bar{t}\mu$ compared with pre-fit expectations from Monte Carlo simulations, as a function of the scalar sum of lepton and jet transverse momenta, $H_{\mathrm{T}}$. The last bin includes overflow events. `Signal (prod.)' and `Signal (dec.)' refer to the single-top-quark production and top-quark pair decay signal contributions, respectively. The pre-fit signal yield represents all Wilson coefficients set to 0.1 simultaneously for a new physics scale of $\Lambda=1$ TeV.

顶夸克对-缪子控制区（CR tar{t}mu）中的观测事件产额，与蒙特卡洛（Monte Carlo）模拟得到的拟合前预期值相对比，二者均以轻子与喷注横向动量的标量总和$H_{mathrm{T}}$为自变量。最后一个分箱包含溢出事件。`Signal (prod.)`与`Signal (dec.)`分别指代单顶夸克产生信号贡献与顶夸克对衰变信号贡献。拟合前的信号产额对应于所有威尔逊系数（Wilson coefficients）同时设为0.1，且新物理标度$Lambda=1$ TeV的情形。