论文标题
在LHC运行3
Probing displaced top quark signature at the LHC Run 3
论文作者
论文摘要
在LHC运行3中搜索新物理学的前瞻性研究中，本文研究了使用由新的长寿命颗粒产生的顶级夸克的相关性，并在ATLAS和CMS实验的跟踪器体积中检测到。这种签名被称为流离失所的夸克，导致最终状态包含流离失所的顶点和高度多样性的流离失所的喷气机和轨道，这要归功于顶部的夸克衰减。因此，它是寻找新的长寿命颗粒的可能功能强大的工具。基于超对称性的三个简化模型是针对该签名的研究明确设计的。它们根据长寿命的重粒子的性质而不同，该颗粒的性质至少产生了一个顶部夸克：电气中性或带电，有色或非彩色的长寿命颗粒。对于每个模型，已经探测了与典型跟踪器体积中的相当数量的流离失所Quark衰减一致的广泛参数空间区域。从这项研究中，定义了有希望的基准，并提出了实验指南。
In the context of prospective studies for searches of new physics at the LHC Run 3, this paper investigates the relevance of using top quarks produced from new long-lived particles, and detected in the tracker volume of the ATLAS and CMS experiments. Such a signature, referred to as displaced top quarks, leads to final states containing displaced vertices and a high multiplicity of displaced jets and tracks, thanks to the top quark decays. Therefore, it is a possible powerful tool for searching for new long-lived particles. Three simplified models based on supersymmetry are explicitly designed for the study of this signature. They differ according to the nature of the long-lived heavy particle which produces at least one top quark: electrically neutral or charged, coloured or non-coloured long-lived particle. For each model, a wide region of parameter space, consistent with a reasonable number of displaced top quarks decaying in a typical tracker volume has been probed. From this study, promising benchmarks are defined and experimental guidelines are suggested.
