标题： 使用CMS探测器在Run-2中搜索长寿命带电粒子 显示英文标题

标题： Search for long-lived charged particles using the CMS detector in Run-2

摘要： 长寿命带电粒子被标准模型以外的各种理论所预测，导致了可能揭示新物理的独特信号。在大型强子对撞机上，CMS探测器能够搜索这些大质量粒子，这些粒子可通过其特征电离模式进行识别。利用2017-2018年收集的数据，我们搜索硅轨迹仪中异常电离的信号。我们提出了一种新的背景预测方法，利用硅像素和条形探测器的不同电离测量值作为独立变量。我们在多个模型中解释结果，包括具有停超子、停止子、胶微子和多重带电粒子的模型，以及一个具有Z'玻色子衰变的新模型。 显示英文摘要

摘要： Long-lived charged particles are predicted by various theories beyond the Standard Model, leading to unique signatures that could reveal new physics. At the LHC, the CMS detector enables searches for these massive particles, identifiable by their characteristic ionization patterns. Using data collected during 2017-2018, we search for signals of anomalous ionization in the silicon tracker. We present a novel approach to background prediction, utilizing the distinct ionization measurements of the silicon pixel and strip detectors as independent variables. We interpret the results within several models including those with staus, stops, gluinos, and multiply charged particles as well as a new model with decays from a Z' boson