论文标题
在最终状态下，在$ \ sqrt {s} $ = 13 tev的$ pp $ collisions中，在最终状态下以顶级夸克对搜索新现象，并缺少横向动量。
Search for new phenomena with top quark pairs in final states with one lepton, jets, and missing transverse momentum in $pp$ collisions at $\sqrt{s}$= 13 TeV with the ATLAS detector
论文作者
论文摘要
在最终状态下，搜索具有顶级夸克对的新现象，其中一个孤立的电子或哑光，多个喷气机和大量缺失的横向动量。信号区域旨在搜索顶部夸克（Stop）的直接生产的超对称伴侣的两体和四体衰变。其他信号区域专门设计用于搜索与一对顶夸克相关产生的Spin-0介质，并腐烂成一对深色物体颗粒。搜索是使用$ \ sqrt {s} $ = 13 TEV录制的Atlas检测器从2015年到2018年录制的$ \ sqrt {s} $ = 13 TEV的大型强化撞机质子proton碰撞数据集进行的搜索，对应于139 fb $^{ - 1} $。没有观察到高于标准模型背景的显着多余，并且在置信水平的95％置信水平上设置了限制，并根据中介体质量或深色 - 粒子质量的函数设置。在两体（三体）衰减方案中，停止最多可排除在1200 GEV（710 GEV）。在四体情况下，最多可停止640 GEV，因为停止 - 中inino的质量差为60 GEV。当调解器与标准模型的耦合强度和深色 - 粒子的耦合强度均等于1时，标量和伪级暗介体被排除在200 GEV中，而当深色 - 强度粒子的质量为1 GEV时。
A search for new phenomena with top quark pairs in final states with one isolated electron or muon, multiple jets, and large missing transverse momentum is performed. Signal regions are designed to search for two-, three-, and four-body decays of the directly pair-produced supersymmetric partner of the top quark (stop). Additional signal regions are designed specifically to search for spin-0 mediators that are produced in association with a pair of top quarks and decay into a pair of dark-matter particles. The search is performed using the Large Hadron Collider proton-proton collision dataset at a centre-of-mass energy of $\sqrt{s}$=13 TeV recorded by the ATLAS detector from 2015 to 2018, corresponding to an integrated luminosity of 139 fb$^{-1}$. No significant excess above the Standard Model background is observed, and limits at 95 % confidence level are set in the stop-neutralino mass plane and as a function of the mediator mass or the dark-matter particle mass. Stops are excluded up to 1200 GeV (710 GeV) in the two-body (three-body) decay scenario. In the four-body scenario stops up to 640 GeV are excluded for a stop-neutralino mass difference of 60 GeV. Scalar and pseudoscalar dark-matter mediators are excluded up to 200 GeV when the coupling strengths of the mediator to Standard Model and dark-matter particles are both equal to one and when the mass of the dark-matter particle is 1 GeV.
