"Aux : Figure 4b" of "Search for direct top squark pair production in events with a Higgs or $Z$ boson, and missing transverse momentum in $\sqrt{s}=13$ TeV $pp$ collisions with the ATLAS detector"

$E^{T}_\text{miss}$ for events with at least 3 jets, one $b$-tagged jets for an integrated luminosity of 36.1 fb$^{-1}$. The contributions from all SM backgrounds are shown as a histogram stack; the bands represent the total uncertainty. In order to enhance the contribution from fake or non-prompt leptons from $t\bar{t}$ events, the events are required to have at least one different flavour lepton pair and no same flavour pair with opposite charge.

该结果针对积分亮度为36.1 fb⁻¹的实验数据，选取至少包含3个喷注（jet）且含1个b标记喷注（b-tagged jet）的事件，给出其缺失横向能量（Missing Transverse Energy，$E^{T}_ ext{miss}$）的分布。所有标准模型（Standard Model, SM）本底的贡献以堆叠直方图形式展示，误差带代表总不确定度。为了增强顶夸克-反顶夸克对撞事件（$tar{t}$ 事件）中虚假轻子或非即时轻子的贡献占比，实验要求事件至少包含一组不同味轻子对，且不包含任何同味异号轻子对。