论文标题
搜索质子proton碰撞中的完全强化最终状态，以搜索底部类型，类似矢量的夸克对生产，$ \ sqrt {s} = $ 13 tev
A search for bottom-type, vector-like quark pair production in a fully hadronic final state in proton-proton collisions at $\sqrt{s} =$ 13 TeV
论文作者
论文摘要
描述了生产一对底型矢量状夸克（VLQ）的搜索，每个Quarks（VLQ）都会腐烂成B或$ \ Mathrm {\ bar {b}} $ Quark，以及Higgs或A Higgs或A Z Boson，质量大于1000 GEV。该分析基于来自质子 - 普罗顿碰撞的数据，该数据在Cern LHC记录的13个TEV质量中心能量上，对应于137 fb $^{ - 1} $的总体集成光度。由于希格斯和Z玻色子的主要衰减模式是对一对夸克的，因此分析的重点是由事件中产生的六个夸克产生的喷气机组成的最终状态。由于在高度洛伦兹（Lorentz）增强的希格斯（Higgs）或z玻色子（Z Boson）的衰减中产生的两个喷气式飞机可以合并形成单个射流，因此进行了九种独立的分析，并按照观察到的JET的数量和重建事件模式进行分类。没有观察到超过预期背景的信号。如果VLQ专门腐烂到B Quark和Higgs Boson，则将下限设置为95％的置信度，等于1570 GEV，1390 GEV，当它专门衰减B Quark和z Boson和Z Boson，而在这两种模式中均等1450 GEV。这些限制代表了对先前发布的VLQ限制的重大改进。
A search is described for the production of a pair of bottom-type vector-like quarks (VLQs), each decaying into a b or $\mathrm{\bar{b}}$ quark and either a Higgs or a Z boson, with a mass greater than 1000 GeV. The analysis is based on data from proton-proton collisions at a 13 TeV center-of-mass energy recorded at the CERN LHC, corresponding to a total integrated luminosity of 137 fb$^{-1}$. As the predominant decay modes of the Higgs and Z bosons are to a pair of quarks, the analysis focuses on final states consisting of jets resulting from the six quarks produced in the events. Since the two jets produced in the decay of a highly Lorentz-boosted Higgs or Z boson can merge to form a single jet, nine independent analyses are performed, categorized by the number of observed jets and the reconstructed event mode. No signal in excess of the expected background is observed. Lower limits are set on the VLQ mass at 95% confidence level equal to 1570 GeV in the case where the VLQ decays exclusively to a b quark and a Higgs boson, 1390 GeV for when it decays exclusively to a b quark and a Z boson, and 1450 GeV for when it decays equally in these two modes. These limits represent significant improvements over the previously published VLQ limits.
