标题： 在质子-质子碰撞中搜索带有许多轻味喷注且含有 0、1 或 2 个带电轻子的顶squark，在 $\sqrt{s}$ = 13 TeV 的条件下 显示英文标题

标题： Search for top squarks in final states with many light-flavor jets and 0, 1, or 2 charged leptons in proton-proton collisions at $\sqrt{s}$ = 13 TeV

摘要： 一些新的物理模型，包括以$R$宇称不守恒（RPV）或附加隐藏扇区为特征的超对称性（SUSY）版本，预测了具有顶夸克、低缺失横向动量和大量额外夸克或胶子的事件的产生。 本文报道了对衰变为两个顶夸克和六个额外轻味夸克或胶子的顶夸克的搜索结果。 该搜索采用一种新颖的机器学习方法，使用去相关鉴别器从数据中的控制样本中进行背景估计。 搜索使用具有0、1或2个电子或μ子以及至少六个喷流的事件进行。 对缺失横向动量的大小没有要求。 该结果基于 2016 年至 2018 年 LHC 上 CMS 探测器采集的 $\sqrt{s}$ = 13 TeV 质子-质子碰撞样本，相当于 138 fb$^{-1}$ 的积分光度。 这些数据用于确定 RPV 和隐形 SUSY 框架下顶夸克对产生截面的上限。 对于 RPV（隐形）SUSY 场景，在 95% 的置信水平下，顶夸克质量小于 700 (930) GeV 的模型被排除在外。 显示英文摘要

摘要： Several new physics models including versions of supersymmetry (SUSY) characterized by $R$-parity violation (RPV) or with additional hidden sectors predict the production of events with top quarks, low missing transverse momentum, and many additional quarks or gluons. The results of a search for top squarks decaying to two top quarks and six additional light-flavor quarks or gluons are reported. The search employs a novel machine learning method for background estimation from control samples in data using decorrelated discriminators. The search is performed using events with 0, 1, or 2 electrons or muons in conjunction with at least six jets. No requirement is placed on the magnitude of the missing transverse momentum. The result is based on a sample of proton-proton collisions at $\sqrt{s}$ = 13 TeV corresponding to 138 fb$^{-1}$ of integrated luminosity collected with the CMS detector at the LHC in 2016$-$2018. The data are used to determine upper limits on the top squark pair production cross section in the frameworks of RPV and stealth SUSY. Models with top squark masses less than 700 (930) GeV are excluded at 95% confidence level for RPV (stealth) SUSY scenarios.