"Low-purity SR 5jex3bex 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 5jex3bex 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.

本数据集包含分辨型qqbb 5jex3bex事件类别下低纯度信号区域内的mWh可观测量分布。‘Others’一词涵盖了来自tHjb、tWh、tttt以及标准模型（Standard Model, SM）Vh产生过程的全部事件。上述分布均基于对数据开展仅背景最大似然拟合的结果给出。单个背景不确定性未考虑讨厌参数（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、且以信号截面与分支比的乘积（$sigma_{ ext{sig}}$ × B）的预期极限值0.064皮可靶恩（pb）进行归一化的预期信号贡献，以虚线直方图形式呈现。