论文标题
部分可观测时空混沌系统的无模型预测
Search for a W' boson decaying to a vector-like quark and a top or bottom quark in the all-jets final state at $\sqrt{s} =$ 13 TeV
论文作者
论文摘要
搜索分别为B或T类Quark和A T或A B Quark的沉重的W'Boson共振衰减。分析是使用LHC上与CMS检测器收集的质子 - 蛋白碰撞进行的。数据对应于13 tev的质量中心能量，对应于138 fb $^{ - 1} $的集成光度。两个衰减通道都会带有带有T夸克，Higgs或Z Boson和B Quark的签名，每个杂物都以明显的Lorentz增强作用。使用JET子结构技术选择了Higgs或Z Boson和T Quark的全部衰减，以减少标准模型背景，从而产生不同的三射流W'Boson衰减签名。没有观察到有关标准模型背景预测的数据的显着偏差。上限设置为W'Boson横截面和最终状态分支部分的乘积的95％置信度。鉴于民主分支分数的基准模型假设，排除了低于3.1 TEV的W'Boson。另外，基于这些假设的概括设置限制。这些是该最终状态迄今为止最敏感的限制。
A search is presented for a heavy W' boson resonance decaying to a B or T vector-like quark and a t or a b quark, respectively. The analysis is performed using proton-proton collisions collected with the CMS detector at the LHC. The data correspond to an integrated luminosity of 138 fb$^{-1}$ at a center-of-mass energy of 13 TeV. Both decay channels result in a signature with a t quark, a Higgs or Z boson, and a b quark, each produced with a significant Lorentz boost. The all-hadronic decays of the Higgs or Z boson and of the t quark are selected using jet substructure techniques to reduce standard model backgrounds, resulting in a distinct three-jet W' boson decay signature. No significant deviation in data with respect to the standard model background prediction is observed. Upper limits are set at 95% confidence level on the product of the W' boson cross section and the final state branching fraction. A W' boson with a mass below 3.1 TeV is excluded, given the benchmark model assumption of democratic branching fractions. In addition, limits are set based on generalizations of these assumptions. These are the most sensitive limits to date for this final state.
