Top-squarks (stop) play an important role in SUSY naturalness. The stop pair production is considered as the most effective way to search for stop at the LHC. However, the collider signature of stop pair production is usually characterized by $t\overline{t}$ plus missing transverse energy, which is also predicted in many other non-supersymmetric models. On the other hand, the single stop production via the electroweak interaction can provide some distinctive signatures, and thus will help to confirm the existence of the stop. In this paper, we investigate the observability of the mono-b events from the single stop production process $pp\to {\tilde{t}}_1{\tilde{\chi }}_1^{-}\to b+{\mathrm{E̸}}_T$ in a simplified MSSM framework where the higgsinos and stops are the only sparticles at the HL-LHC and HE-LHC. We find that the stop mass and the higgsino mass may be probed up to about 1.6 TeV and 550 GeV at 5σ level at the HE-LHC with the integrated luminosity $\mathcal{L}=15{\text{ab}}^{-1}$. We also present the 2σ exclusion limits of the stop mass at the HL-LHC and HE-LHC.

顶排（停止）在SUSY自然度中起重要作用。停止对的产生被认为是在大型强子对撞机中寻找停止的最有效方法。但是，停止对生产的对撞机签名通常具有以下特征：$Ť\overline{Ť}$加上缺少的横向能量，这在许多其他非超对称模型中也可以预测。另一方面，通过电弱相互作用产生的单停止可以提供一些独特的特征，因此将有助于确认停止的存在。在本文中，我们研究了单的可观测b事件从单一的一条龙生产工艺$pp\to {\stackrel{〜}{Ť}}_{\mathrm{1个}}{\stackrel{〜}{\chi }}_{\mathrm{1个}}^{-}\to b+{̸}_{Ť}$在简化的MSSM框架中，higgsinos和stops是HL-LHC和HE-LHC的唯一粒子。我们发现，停止质量和higgsino质量可探测高达约1.6 TeV能在5 550 GeV的σ在HE-LHC与积分亮度水平$\mathcal{大号}=15{\text{b}}^{-\mathrm{1个}}$。我们还介绍了HL-LHC和HE-LHC处的2σ停止质量的排除限。