论文标题
在PP碰撞中，搜索成对生产的标量和矢量leptoquarks腐烂成第三代夸克和第一代或第二代leptons
Search for pair-produced scalar and vector leptoquarks decaying into third-generation quarks and first- or second-generation leptons in pp collisions with the ATLAS detector
论文作者
论文摘要
提出了对成对产生的标量和向量leptoquarks腐烂到不同世代的lept子的搜索。它使用完整的LHC Run 2（2015-2018）数据集的139 fb $^{ - 1} $的数据集，在Proton-Proton碰撞中收集的Atlas检测器以$ \ sqrt {s} = 13 $ tev的质量中心能量中的Atlas检测器收集。具有电荷的标量leptoquarks - （1/3）E以及标量和矢量leptoquarks具有电荷 +（2/3）e。将对第一代（t，b）的夸克产生的所有可能的衰变，以及在最终状态下完全具有一个电子或穆恩的第一代或第二代（$ e，μ，ν$）的带电或中性瘦素（$ e，μ，ν$）。没有观察到与标准模型期望的显着偏差。为八个模型提供了生产横截面上的上限，该模型与Leptokark质量的函数以及Leptoquark的分支比为带电或中性的Lepton。另外，在一系列分支比率的所有模型中都会得出Leptoquark质量的下限。其中两个模型的目的是为最近的B-动物提供解释。在这两个模型中，矢量leptoquark都以相似的分支分数衰减第二代带电和中性的瘦素。这两个模型的Leptoquark质量设置了1980年GEV和1710 GEV的下限。
A search for pair-produced scalar and vector leptoquarks decaying into quarks and leptons of different generations is presented. It uses the full LHC Run 2 (2015-2018) data set of 139 fb$^{-1}$ collected with the ATLAS detector in proton-proton collisions at a centre-of-mass energy of $\sqrt{s} = 13$ TeV. Scalar leptoquarks with charge -(1/3)e as well as scalar and vector leptoquarks with charge +(2/3)e are considered. All possible decays of the pair-produced leptoquarks into quarks of the third generation (t, b) and charged or neutral leptons of the first or second generation ($e, μ, ν$) with exactly one electron or muon in the final state are investigated. No significant deviations from the Standard Model expectation are observed. Upper limits on the production cross-section are provided for eight models as a function of the leptoquark mass and the branching ratio of the leptoquark into the charged or neutral lepton. In addition, lower limits on the leptoquark masses are derived for all models across a range of branching ratios. Two of these models have the goal of providing an explanation for the recent B-anomalies. In both models, a vector leptoquark decays into charged and neutral leptons of the second generation with a similar branching fraction. Lower limits of 1980 GeV and 1710 GeV are set on the leptoquark mass for these two models.
