论文标题
在最终状态下以$ \ sqrt {s} = $ 13 tev的方式搜索最终状态下的单个生产T Quark腐烂到最终状态的顶部夸克和Z Boson
Search for single production of a vector-like T quark decaying to a top quark and a Z boson in the final state with jets and missing transverse momentum at $\sqrt{s} =$ 13 TeV
论文作者
论文摘要
搜索搜索单次生产类似于矢量的T夸克，充电2/3 $ e $，在衰减频道中，带有顶部夸克和Z玻孔，顶部的夸克衰减强调，Z玻色子腐烂到中微子。该搜索使用CMS实验收集的数据在质子质子碰撞中以13 TEV为中心的质量碰撞，对应于2016- 2018年在CERN LHC记录的137 Fb $^{ - 1} $的集成光度。搜索对t夸克质量在0.6至1.8 teV之间敏感，衰减宽度的范围从可忽略不足至t夸克质量的30％不等。顶级夸克的重建策略是基于洛伦兹的最终状态提升的程度。在95％的置信度下，横截面乘积和小衰减宽度的分支分数的上限在15至602 fb之间变化，具体取决于其质量。对于腐烂宽度的T夸克（T Quark）在其质量的10％至30％之间，该上限范围在16至836 fb之间。对于大多数研究范围，结果提供了迄今为止的最佳限制。这是基于LHC的完整运行2个数据集对单个T Quark生产的首次搜索。
A search is presented for single production of a vector-like T quark with charge 2/3 $e$, in the decay channel featuring a top quark and a Z boson, with the top quark decaying hadronically and the Z boson decaying to neutrinos. The search uses data collected by the CMS experiment in proton-proton collisions at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 137 fb$^{-1}$ recorded at the CERN LHC in 2016-2018. The search is sensitive to a T quark mass between 0.6 and 1.8 TeV with decay widths ranging from negligibly small up to 30% of the T quark mass. Reconstruction strategies for the top quark are based on the degree of Lorentz boosting of its final state. At 95% confidence level, the upper limit on the product of the cross section and branching fraction for a T quark of small decay width varies between 15 and 602 fb, depending on its mass. For a T quark with decay widths between 10 and 30% of its mass, this upper limit ranges between 16 and 836 fb. For most of the studied range, the results provide the best limits to date. This is the first search for single T quark production based on the full Run 2 data set of the LHC.
