"Low-purity SR 6jin3bex qqbb postfit" of "Search for a heavy charged Higgs boson decaying into a $W$ boson and a Higgs boson in final states with leptons and $b$-jets in $\sqrt{s} = 13$ TeV $pp$ collisions with the ATLAS detector"

Distributions of the mWh observable in the low-purity signal regions of the resolved qqbb 6jin3bex event categories. The term ‘Others’ summarises events from tHjb, tWh, tttt, and SM Vh production. The distributions are presented after a background-only maximum-likelihood fit to data. The individual background uncertainty does not take into account the possible correlations between the nuisance parameter. The expected signal contribution assuming $m_{H^{\pm}}$ = 700 GeV, normalised to the expected limit of the cross-section times branching ratio ($\sigma_{sig}$ × B) of 0.064 pb, is shown as a dashed histogram.

本数据集展示了分辨型qqbb（resolved qqbb）6jin3bex事件类别的低纯度信号区域内mWh可观测量的分布。"Others"项涵盖了来自tHjb、tWh、tttt以及标准模型（Standard Model，SM）Vh产生过程的全部事件。上述分布均为仅对实验数据开展背景极大似然拟合后的结果。单个背景的不确定性未考虑各讨厌参数（nuisance parameter）之间可能存在的相关性。假设带电希格斯玻色子质量（$m_{H^pm}$）为700 GeV的预期信号贡献，已按截面与分支比的乘积（$sigma_{ ext{sig}} imes B$）的预期极限0.064皮靶（pb）进行归一化，以虚线直方图形式呈现。